./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.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-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:43:44,154 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:43:44,203 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:43:44,207 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:43:44,208 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:43:44,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:43:44,230 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:43:44,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:43:44,230 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:43:44,230 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:43:44,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:43:44,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:43:44,231 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:43:44,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:43:44,231 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:43:44,232 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:43:44,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:43:44,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:43:44,232 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 -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2025-03-13 21:43:44,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:43:44,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:43:44,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:43:44,475 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:43:44,475 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:43:44,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2025-03-13 21:43:45,641 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e43bb31d4/dcf53ea278f04ce3b9a35365ceee2da0/FLAG01c8af3c2 [2025-03-13 21:43:45,902 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:43:45,903 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2025-03-13 21:43:45,908 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e43bb31d4/dcf53ea278f04ce3b9a35365ceee2da0/FLAG01c8af3c2 [2025-03-13 21:43:46,224 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e43bb31d4/dcf53ea278f04ce3b9a35365ceee2da0 [2025-03-13 21:43:46,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:43:46,228 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:43:46,229 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:43:46,230 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:43:46,233 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:43:46,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154d80e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46, skipping insertion in model container [2025-03-13 21:43:46,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,250 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:43:46,394 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-word-symm.wvr.c[2874,2887] [2025-03-13 21:43:46,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:43:46,415 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:43:46,436 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-word-symm.wvr.c[2874,2887] [2025-03-13 21:43:46,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:43:46,453 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:43:46,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46 WrapperNode [2025-03-13 21:43:46,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:43:46,455 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:43:46,455 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:43:46,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:43:46,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,467 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,484 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 117 [2025-03-13 21:43:46,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:43:46,488 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:43:46,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:43:46,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:43:46,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,517 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-13 21:43:46,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,528 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,535 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:43:46,536 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:43:46,539 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:43:46,539 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:43:46,540 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (1/1) ... [2025-03-13 21:43:46,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:43:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:46,566 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 21:43:46,568 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 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:43:46,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:43:46,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:43:46,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:43:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:43:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:43:46,588 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 21:43:46,667 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:43:46,669 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:43:46,960 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:43:46,961 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:43:46,961 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:43:47,189 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:43:47,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:43:47 BoogieIcfgContainer [2025-03-13 21:43:47,189 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:43:47,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:43:47,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:43:47,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:43:47,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:43:46" (1/3) ... [2025-03-13 21:43:47,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa8bbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:43:47, skipping insertion in model container [2025-03-13 21:43:47,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:43:46" (2/3) ... [2025-03-13 21:43:47,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa8bbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:43:47, skipping insertion in model container [2025-03-13 21:43:47,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:43:47" (3/3) ... [2025-03-13 21:43:47,197 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2025-03-13 21:43:47,206 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:43:47,207 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-word-symm.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-13 21:43:47,207 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:43:47,249 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-13 21:43:47,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2025-03-13 21:43:47,293 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2025-03-13 21:43:47,297 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:43:47,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-03-13 21:43:47,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2025-03-13 21:43:47,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2025-03-13 21:43:47,311 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:43:47,322 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;@7266068b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:43:47,322 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-13 21:43:47,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:43:47,331 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2025-03-13 21:43:47,331 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:43:47,331 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:47,331 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:47,333 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:47,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2081270935, now seen corresponding path program 1 times [2025-03-13 21:43:47,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:47,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775141692] [2025-03-13 21:43:47,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:47,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:47,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:43:47,442 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:43:47,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:47,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:47,835 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 21:43:47,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775141692] [2025-03-13 21:43:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775141692] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:47,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:47,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:47,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673976357] [2025-03-13 21:43:47,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:47,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:47,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:47,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:47,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:47,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:47,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 21:43:47,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:47,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:47,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:48,120 INFO L124 PetriNetUnfolderBase]: 244/413 cut-off events. [2025-03-13 21:43:48,120 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-13 21:43:48,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 413 events. 244/413 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1457 event pairs, 115 based on Foata normal form. 1/346 useless extension candidates. Maximal degree in co-relation 755. Up to 301 conditions per place. [2025-03-13 21:43:48,128 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 37 selfloop transitions, 1 changer transitions 7/48 dead transitions. [2025-03-13 21:43:48,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 48 transitions, 210 flow [2025-03-13 21:43:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2025-03-13 21:43:48,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2025-03-13 21:43:48,139 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 4 states and 67 transitions. [2025-03-13 21:43:48,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 48 transitions, 210 flow [2025-03-13 21:43:48,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-13 21:43:48,148 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 75 flow [2025-03-13 21:43:48,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2025-03-13 21:43:48,151 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-13 21:43:48,152 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 75 flow [2025-03-13 21:43:48,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 21:43:48,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:48,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:48,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:43:48,156 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:48,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1103715989, now seen corresponding path program 2 times [2025-03-13 21:43:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979921952] [2025-03-13 21:43:48,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:48,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:43:48,182 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:43:48,183 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:48,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:48,366 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 21:43:48,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:48,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979921952] [2025-03-13 21:43:48,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979921952] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:48,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:48,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:48,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670208528] [2025-03-13 21:43:48,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:48,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:43:48,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:48,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:43:48,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:43:48,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:48,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 21:43:48,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:48,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:48,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:48,555 INFO L124 PetriNetUnfolderBase]: 284/495 cut-off events. [2025-03-13 21:43:48,555 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-03-13 21:43:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 495 events. 284/495 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1969 event pairs, 156 based on Foata normal form. 6/443 useless extension candidates. Maximal degree in co-relation 1022. Up to 367 conditions per place. [2025-03-13 21:43:48,558 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 37 selfloop transitions, 1 changer transitions 9/50 dead transitions. [2025-03-13 21:43:48,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 50 transitions, 217 flow [2025-03-13 21:43:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:43:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:43:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2025-03-13 21:43:48,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2025-03-13 21:43:48,561 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 75 flow. Second operand 4 states and 69 transitions. [2025-03-13 21:43:48,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 50 transitions, 217 flow [2025-03-13 21:43:48,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 50 transitions, 211 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:48,564 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 81 flow [2025-03-13 21:43:48,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2025-03-13 21:43:48,565 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2025-03-13 21:43:48,565 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 81 flow [2025-03-13 21:43:48,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 21:43:48,566 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:48,566 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:48,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:43:48,566 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:48,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1510863721, now seen corresponding path program 1 times [2025-03-13 21:43:48,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:48,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452522157] [2025-03-13 21:43:48,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:48,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:48,579 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-13 21:43:48,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-13 21:43:48,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:48,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:48,617 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 21:43:48,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:48,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452522157] [2025-03-13 21:43:48,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452522157] 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 [3] imperfect sequences [] total 3 [2025-03-13 21:43:48,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513715498] [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 3 states [2025-03-13 21:43:48,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:48,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:43:48,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:43:48,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:48,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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: 5 of 34 [2025-03-13 21:43:48,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:48,712 INFO L124 PetriNetUnfolderBase]: 194/341 cut-off events. [2025-03-13 21:43:48,712 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-03-13 21:43:48,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 341 events. 194/341 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1182 event pairs, 62 based on Foata normal form. 17/325 useless extension candidates. Maximal degree in co-relation 716. Up to 255 conditions per place. [2025-03-13 21:43:48,717 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 31 selfloop transitions, 2 changer transitions 5/41 dead transitions. [2025-03-13 21:43:48,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 183 flow [2025-03-13 21:43:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:43:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:43:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2025-03-13 21:43:48,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2025-03-13 21:43:48,718 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 81 flow. Second operand 3 states and 55 transitions. [2025-03-13 21:43:48,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 183 flow [2025-03-13 21:43:48,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 180 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:48,719 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2025-03-13 21:43:48,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2025-03-13 21:43:48,720 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2025-03-13 21:43:48,720 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2025-03-13 21:43:48,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 21:43:48,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:48,720 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:48,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:43:48,720 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:48,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1198863773, now seen corresponding path program 1 times [2025-03-13 21:43:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:48,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830895573] [2025-03-13 21:43:48,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:48,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:48,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:43:48,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:43:48,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:48,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:49,079 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 21:43:49,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830895573] [2025-03-13 21:43:49,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830895573] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:49,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:49,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:43:49,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297125417] [2025-03-13 21:43:49,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:49,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:43:49,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:49,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:43:49,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:43:49,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:49,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 21:43:49,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:49,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:49,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:49,340 INFO L124 PetriNetUnfolderBase]: 416/713 cut-off events. [2025-03-13 21:43:49,340 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2025-03-13 21:43:49,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570 conditions, 713 events. 416/713 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2994 event pairs, 74 based on Foata normal form. 1/645 useless extension candidates. Maximal degree in co-relation 499. Up to 245 conditions per place. [2025-03-13 21:43:49,347 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 79 selfloop transitions, 14 changer transitions 1/97 dead transitions. [2025-03-13 21:43:49,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 97 transitions, 448 flow [2025-03-13 21:43:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-13 21:43:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-13 21:43:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2025-03-13 21:43:49,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48161764705882354 [2025-03-13 21:43:49,349 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 8 states and 131 transitions. [2025-03-13 21:43:49,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 97 transitions, 448 flow [2025-03-13 21:43:49,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 97 transitions, 424 flow, removed 12 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:49,353 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 168 flow [2025-03-13 21:43:49,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2025-03-13 21:43:49,354 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2025-03-13 21:43:49,354 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 168 flow [2025-03-13 21:43:49,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 21:43:49,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:49,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:49,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:43:49,355 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:49,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2105802840, now seen corresponding path program 1 times [2025-03-13 21:43:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:49,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124090986] [2025-03-13 21:43:49,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:49,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:49,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:43:49,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:49,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:49,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124090986] [2025-03-13 21:43:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124090986] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793809757] [2025-03-13 21:43:49,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:49,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:49,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:49,641 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 21:43:49,642 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 21:43:49,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:43:49,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:49,717 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:49,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:49,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:43:49,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:50,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793809757] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:50,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:43:50,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2025-03-13 21:43:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624763091] [2025-03-13 21:43:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:50,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:43:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:50,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:43:50,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-03-13 21:43:50,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:50,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 168 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 21:43:50,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:50,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:50,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:51,414 INFO L124 PetriNetUnfolderBase]: 930/1613 cut-off events. [2025-03-13 21:43:51,414 INFO L125 PetriNetUnfolderBase]: For 390/394 co-relation queries the response was YES. [2025-03-13 21:43:51,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 1613 events. 930/1613 cut-off events. For 390/394 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8412 event pairs, 98 based on Foata normal form. 5/1615 useless extension candidates. Maximal degree in co-relation 2669. Up to 304 conditions per place. [2025-03-13 21:43:51,425 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 122 selfloop transitions, 46 changer transitions 6/177 dead transitions. [2025-03-13 21:43:51,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 177 transitions, 946 flow [2025-03-13 21:43:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:43:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:43:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2025-03-13 21:43:51,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4796380090497738 [2025-03-13 21:43:51,427 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 168 flow. Second operand 13 states and 212 transitions. [2025-03-13 21:43:51,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 177 transitions, 946 flow [2025-03-13 21:43:51,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 177 transitions, 942 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-03-13 21:43:51,431 INFO L231 Difference]: Finished difference. Result has 62 places, 78 transitions, 521 flow [2025-03-13 21:43:51,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=521, PETRI_PLACES=62, PETRI_TRANSITIONS=78} [2025-03-13 21:43:51,432 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2025-03-13 21:43:51,432 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 78 transitions, 521 flow [2025-03-13 21:43:51,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 21:43:51,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:51,432 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:51,440 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 21:43:51,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:51,639 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:51,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash -68932744, now seen corresponding path program 1 times [2025-03-13 21:43:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:51,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758415294] [2025-03-13 21:43:51,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:51,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:51,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:43:51,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:51,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:51,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758415294] [2025-03-13 21:43:51,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758415294] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495014997] [2025-03-13 21:43:51,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:51,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:51,851 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 21:43:51,853 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 21:43:51,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:43:51,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:51,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:51,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:51,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:43:51,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:52,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495014997] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:52,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:43:52,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2025-03-13 21:43:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565436374] [2025-03-13 21:43:52,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:52,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:43:52,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:52,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:43:52,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2025-03-13 21:43:52,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:52,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 78 transitions, 521 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:52,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:52,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:52,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:53,337 INFO L124 PetriNetUnfolderBase]: 1355/2368 cut-off events. [2025-03-13 21:43:53,337 INFO L125 PetriNetUnfolderBase]: For 3741/3745 co-relation queries the response was YES. [2025-03-13 21:43:53,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7575 conditions, 2368 events. 1355/2368 cut-off events. For 3741/3745 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13453 event pairs, 267 based on Foata normal form. 5/2370 useless extension candidates. Maximal degree in co-relation 7496. Up to 697 conditions per place. [2025-03-13 21:43:53,354 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 175 selfloop transitions, 48 changer transitions 7/233 dead transitions. [2025-03-13 21:43:53,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 233 transitions, 1629 flow [2025-03-13 21:43:53,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:43:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:43:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 257 transitions. [2025-03-13 21:43:53,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5399159663865546 [2025-03-13 21:43:53,356 INFO L175 Difference]: Start difference. First operand has 62 places, 78 transitions, 521 flow. Second operand 14 states and 257 transitions. [2025-03-13 21:43:53,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 233 transitions, 1629 flow [2025-03-13 21:43:53,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 233 transitions, 1606 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-03-13 21:43:53,370 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 798 flow [2025-03-13 21:43:53,370 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=798, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2025-03-13 21:43:53,371 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2025-03-13 21:43:53,371 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 798 flow [2025-03-13 21:43:53,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:53,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:53,371 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:53,379 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 21:43:53,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-13 21:43:53,571 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:53,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1548476456, now seen corresponding path program 1 times [2025-03-13 21:43:53,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:53,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015359245] [2025-03-13 21:43:53,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:53,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:53,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:43:53,583 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:53,583 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:53,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:53,626 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 21:43:53,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:53,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015359245] [2025-03-13 21:43:53,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015359245] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:53,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:53,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440034638] [2025-03-13 21:43:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:53,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:53,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:53,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:53,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:43:53,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:53,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 798 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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 21:43:53,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:53,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:53,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:53,856 INFO L124 PetriNetUnfolderBase]: 980/1860 cut-off events. [2025-03-13 21:43:53,856 INFO L125 PetriNetUnfolderBase]: For 5104/5104 co-relation queries the response was YES. [2025-03-13 21:43:53,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 1860 events. 980/1860 cut-off events. For 5104/5104 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11075 event pairs, 563 based on Foata normal form. 72/1928 useless extension candidates. Maximal degree in co-relation 6256. Up to 906 conditions per place. [2025-03-13 21:43:53,871 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 100 selfloop transitions, 14 changer transitions 8/125 dead transitions. [2025-03-13 21:43:53,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1169 flow [2025-03-13 21:43:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:43:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:43:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2025-03-13 21:43:53,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2025-03-13 21:43:53,873 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 798 flow. Second operand 6 states and 90 transitions. [2025-03-13 21:43:53,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1169 flow [2025-03-13 21:43:53,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1087 flow, removed 26 selfloop flow, removed 3 redundant places. [2025-03-13 21:43:53,889 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 668 flow [2025-03-13 21:43:53,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=668, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2025-03-13 21:43:53,891 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2025-03-13 21:43:53,891 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 668 flow [2025-03-13 21:43:53,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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 21:43:53,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:53,892 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:53,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-13 21:43:53,892 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:53,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:53,892 INFO L85 PathProgramCache]: Analyzing trace with hash 877291088, now seen corresponding path program 2 times [2025-03-13 21:43:53,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:53,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332717462] [2025-03-13 21:43:53,892 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:53,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:53,898 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:53,904 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 22 statements. [2025-03-13 21:43:53,904 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:53,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:43:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332717462] [2025-03-13 21:43:54,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332717462] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:54,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:54,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-13 21:43:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036469014] [2025-03-13 21:43:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:54,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:43:54,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:54,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:43:54,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:43:54,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:54,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 668 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:54,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:54,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:54,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:54,451 INFO L124 PetriNetUnfolderBase]: 948/1734 cut-off events. [2025-03-13 21:43:54,453 INFO L125 PetriNetUnfolderBase]: For 5094/5110 co-relation queries the response was YES. [2025-03-13 21:43:54,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6361 conditions, 1734 events. 948/1734 cut-off events. For 5094/5110 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9675 event pairs, 158 based on Foata normal form. 17/1748 useless extension candidates. Maximal degree in co-relation 5226. Up to 927 conditions per place. [2025-03-13 21:43:54,464 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 47 changer transitions 5/162 dead transitions. [2025-03-13 21:43:54,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 162 transitions, 1395 flow [2025-03-13 21:43:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:43:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:43:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2025-03-13 21:43:54,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4304812834224599 [2025-03-13 21:43:54,466 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 668 flow. Second operand 11 states and 161 transitions. [2025-03-13 21:43:54,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 162 transitions, 1395 flow [2025-03-13 21:43:54,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 162 transitions, 1373 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-13 21:43:54,480 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 934 flow [2025-03-13 21:43:54,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=934, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2025-03-13 21:43:54,482 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2025-03-13 21:43:54,482 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 934 flow [2025-03-13 21:43:54,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:54,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:54,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:54,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-13 21:43:54,483 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:54,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1691639750, now seen corresponding path program 3 times [2025-03-13 21:43:54,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:54,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18726400] [2025-03-13 21:43:54,484 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:54,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:54,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:54,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 22 statements. [2025-03-13 21:43:54,496 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:43:54,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:43:54,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:54,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18726400] [2025-03-13 21:43:54,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18726400] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:54,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:54,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-13 21:43:54,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376048622] [2025-03-13 21:43:54,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:54,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:43:54,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:54,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:43:54,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:43:54,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:54,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 934 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:54,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:54,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:54,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:55,036 INFO L124 PetriNetUnfolderBase]: 938/1714 cut-off events. [2025-03-13 21:43:55,036 INFO L125 PetriNetUnfolderBase]: For 6398/6410 co-relation queries the response was YES. [2025-03-13 21:43:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6814 conditions, 1714 events. 938/1714 cut-off events. For 6398/6410 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9521 event pairs, 156 based on Foata normal form. 13/1725 useless extension candidates. Maximal degree in co-relation 6716. Up to 518 conditions per place. [2025-03-13 21:43:55,047 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 132 selfloop transitions, 50 changer transitions 6/191 dead transitions. [2025-03-13 21:43:55,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 191 transitions, 1730 flow [2025-03-13 21:43:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:43:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:43:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2025-03-13 21:43:55,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2025-03-13 21:43:55,049 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 934 flow. Second operand 13 states and 204 transitions. [2025-03-13 21:43:55,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 191 transitions, 1730 flow [2025-03-13 21:43:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 191 transitions, 1661 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-03-13 21:43:55,065 INFO L231 Difference]: Finished difference. Result has 104 places, 96 transitions, 989 flow [2025-03-13 21:43:55,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=989, PETRI_PLACES=104, PETRI_TRANSITIONS=96} [2025-03-13 21:43:55,066 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2025-03-13 21:43:55,066 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 96 transitions, 989 flow [2025-03-13 21:43:55,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:55,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:55,066 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:55,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-13 21:43:55,066 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:55,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1579751142, now seen corresponding path program 4 times [2025-03-13 21:43:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612840060] [2025-03-13 21:43:55,067 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:55,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:55,074 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:55,080 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:55,080 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:55,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:55,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:55,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612840060] [2025-03-13 21:43:55,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612840060] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:55,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929655535] [2025-03-13 21:43:55,279 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:43:55,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:55,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:55,282 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 21:43:55,284 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 21:43:55,324 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:55,341 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:55,341 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:43:55,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:55,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:43:55,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:55,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929655535] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:55,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:43:55,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2025-03-13 21:43:55,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763949585] [2025-03-13 21:43:55,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:55,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:43:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:55,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:43:55,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2025-03-13 21:43:55,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:55,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 96 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 21:43:55,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:55,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:55,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:56,297 INFO L124 PetriNetUnfolderBase]: 920/1672 cut-off events. [2025-03-13 21:43:56,298 INFO L125 PetriNetUnfolderBase]: For 6733/6745 co-relation queries the response was YES. [2025-03-13 21:43:56,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6814 conditions, 1672 events. 920/1672 cut-off events. For 6733/6745 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9179 event pairs, 163 based on Foata normal form. 13/1683 useless extension candidates. Maximal degree in co-relation 6740. Up to 517 conditions per place. [2025-03-13 21:43:56,309 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 116 selfloop transitions, 48 changer transitions 6/173 dead transitions. [2025-03-13 21:43:56,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 173 transitions, 1677 flow [2025-03-13 21:43:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:43:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:43:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2025-03-13 21:43:56,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2025-03-13 21:43:56,310 INFO L175 Difference]: Start difference. First operand has 104 places, 96 transitions, 989 flow. Second operand 12 states and 180 transitions. [2025-03-13 21:43:56,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 173 transitions, 1677 flow [2025-03-13 21:43:56,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 173 transitions, 1571 flow, removed 8 selfloop flow, removed 10 redundant places. [2025-03-13 21:43:56,327 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 1000 flow [2025-03-13 21:43:56,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1000, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2025-03-13 21:43:56,328 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2025-03-13 21:43:56,328 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 1000 flow [2025-03-13 21:43:56,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 21:43:56,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:56,329 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:56,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:43:56,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:56,529 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:56,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2122478446, now seen corresponding path program 5 times [2025-03-13 21:43:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:56,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852897565] [2025-03-13 21:43:56,530 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:56,538 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:56,546 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:56,547 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:43:56,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:56,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852897565] [2025-03-13 21:43:56,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852897565] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355625153] [2025-03-13 21:43:56,725 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:43:56,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:43:56,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:43:56,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:43:56,766 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:56,781 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:56,781 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:43:56,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:56,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:43:56,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:43:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:56,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:43:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:43:57,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355625153] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:43:57,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:43:57,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2025-03-13 21:43:57,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818917493] [2025-03-13 21:43:57,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:57,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:43:57,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:57,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:43:57,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2025-03-13 21:43:57,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:57,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 1000 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 21:43:57,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:57,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:57,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:58,119 INFO L124 PetriNetUnfolderBase]: 998/1835 cut-off events. [2025-03-13 21:43:58,119 INFO L125 PetriNetUnfolderBase]: For 7722/7734 co-relation queries the response was YES. [2025-03-13 21:43:58,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7394 conditions, 1835 events. 998/1835 cut-off events. For 7722/7734 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10396 event pairs, 164 based on Foata normal form. 13/1845 useless extension candidates. Maximal degree in co-relation 7309. Up to 517 conditions per place. [2025-03-13 21:43:58,138 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 132 selfloop transitions, 51 changer transitions 6/192 dead transitions. [2025-03-13 21:43:58,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 192 transitions, 1820 flow [2025-03-13 21:43:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:43:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:43:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2025-03-13 21:43:58,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4592760180995475 [2025-03-13 21:43:58,141 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 1000 flow. Second operand 13 states and 203 transitions. [2025-03-13 21:43:58,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 192 transitions, 1820 flow [2025-03-13 21:43:58,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 192 transitions, 1727 flow, removed 7 selfloop flow, removed 9 redundant places. [2025-03-13 21:43:58,161 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 1096 flow [2025-03-13 21:43:58,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1096, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2025-03-13 21:43:58,161 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2025-03-13 21:43:58,161 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 1096 flow [2025-03-13 21:43:58,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 21:43:58,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:58,162 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:58,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:43:58,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:43:58,363 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:58,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -19175634, now seen corresponding path program 6 times [2025-03-13 21:43:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754625917] [2025-03-13 21:43:58,363 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:43:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:58,368 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:58,372 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 21 of 22 statements. [2025-03-13 21:43:58,372 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:43:58,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:43:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754625917] [2025-03-13 21:43:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754625917] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:58,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:58,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-13 21:43:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694179394] [2025-03-13 21:43:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:58,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:43:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:58,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:43:58,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:43:58,564 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:58,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 100 transitions, 1096 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:58,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:58,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:58,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:58,890 INFO L124 PetriNetUnfolderBase]: 980/1794 cut-off events. [2025-03-13 21:43:58,890 INFO L125 PetriNetUnfolderBase]: For 8180/8192 co-relation queries the response was YES. [2025-03-13 21:43:58,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7438 conditions, 1794 events. 980/1794 cut-off events. For 8180/8192 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10037 event pairs, 181 based on Foata normal form. 7/1798 useless extension candidates. Maximal degree in co-relation 7356. Up to 837 conditions per place. [2025-03-13 21:43:58,903 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 52 changer transitions 6/156 dead transitions. [2025-03-13 21:43:58,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 156 transitions, 1650 flow [2025-03-13 21:43:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:43:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:43:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2025-03-13 21:43:58,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-03-13 21:43:58,905 INFO L175 Difference]: Start difference. First operand has 111 places, 100 transitions, 1096 flow. Second operand 11 states and 154 transitions. [2025-03-13 21:43:58,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 156 transitions, 1650 flow [2025-03-13 21:43:58,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 156 transitions, 1598 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-03-13 21:43:58,973 INFO L231 Difference]: Finished difference. Result has 115 places, 101 transitions, 1176 flow [2025-03-13 21:43:58,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1176, PETRI_PLACES=115, PETRI_TRANSITIONS=101} [2025-03-13 21:43:58,976 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2025-03-13 21:43:58,976 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 101 transitions, 1176 flow [2025-03-13 21:43:58,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:58,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:58,976 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:58,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-13 21:43:58,977 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:58,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:58,977 INFO L85 PathProgramCache]: Analyzing trace with hash -144835976, now seen corresponding path program 2 times [2025-03-13 21:43:58,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:58,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210947697] [2025-03-13 21:43:58,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:43:58,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:58,982 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:58,986 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 22 statements. [2025-03-13 21:43:58,986 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:43:58,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:43:59,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:59,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210947697] [2025-03-13 21:43:59,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210947697] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:59,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:59,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-13 21:43:59,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621678091] [2025-03-13 21:43:59,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:59,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:43:59,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:59,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:43:59,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:43:59,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:59,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 101 transitions, 1176 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:59,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:59,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:59,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:59,446 INFO L124 PetriNetUnfolderBase]: 967/1766 cut-off events. [2025-03-13 21:43:59,447 INFO L125 PetriNetUnfolderBase]: For 8648/8660 co-relation queries the response was YES. [2025-03-13 21:43:59,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7637 conditions, 1766 events. 967/1766 cut-off events. For 8648/8660 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9785 event pairs, 182 based on Foata normal form. 13/1776 useless extension candidates. Maximal degree in co-relation 7554. Up to 738 conditions per place. [2025-03-13 21:43:59,456 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 117 selfloop transitions, 49 changer transitions 8/177 dead transitions. [2025-03-13 21:43:59,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 177 transitions, 1911 flow [2025-03-13 21:43:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:43:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:43:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 179 transitions. [2025-03-13 21:43:59,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40497737556561086 [2025-03-13 21:43:59,458 INFO L175 Difference]: Start difference. First operand has 115 places, 101 transitions, 1176 flow. Second operand 13 states and 179 transitions. [2025-03-13 21:43:59,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 177 transitions, 1911 flow [2025-03-13 21:43:59,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 1753 flow, removed 16 selfloop flow, removed 11 redundant places. [2025-03-13 21:43:59,482 INFO L231 Difference]: Finished difference. Result has 122 places, 110 transitions, 1291 flow [2025-03-13 21:43:59,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1291, PETRI_PLACES=122, PETRI_TRANSITIONS=110} [2025-03-13 21:43:59,483 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2025-03-13 21:43:59,483 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 110 transitions, 1291 flow [2025-03-13 21:43:59,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:43:59,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:59,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:59,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-13 21:43:59,483 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:59,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:59,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2082924026, now seen corresponding path program 3 times [2025-03-13 21:43:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:59,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056625747] [2025-03-13 21:43:59,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:43:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:59,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:43:59,496 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 22 statements. [2025-03-13 21:43:59,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:43:59,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:43:59,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:59,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056625747] [2025-03-13 21:43:59,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056625747] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:59,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:59,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:43:59,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968044638] [2025-03-13 21:43:59,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:59,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:43:59,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:59,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:43:59,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:43:59,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:43:59,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 110 transitions, 1291 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 21:43:59,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:43:59,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:43:59,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:43:59,912 INFO L124 PetriNetUnfolderBase]: 948/1729 cut-off events. [2025-03-13 21:43:59,912 INFO L125 PetriNetUnfolderBase]: For 8767/8775 co-relation queries the response was YES. [2025-03-13 21:43:59,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7473 conditions, 1729 events. 948/1729 cut-off events. For 8767/8775 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9532 event pairs, 174 based on Foata normal form. 9/1738 useless extension candidates. Maximal degree in co-relation 7399. Up to 1020 conditions per place. [2025-03-13 21:43:59,921 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 104 selfloop transitions, 46 changer transitions 5/158 dead transitions. [2025-03-13 21:43:59,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 158 transitions, 1779 flow [2025-03-13 21:43:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:43:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:43:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2025-03-13 21:43:59,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42058823529411765 [2025-03-13 21:43:59,922 INFO L175 Difference]: Start difference. First operand has 122 places, 110 transitions, 1291 flow. Second operand 10 states and 143 transitions. [2025-03-13 21:43:59,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 158 transitions, 1779 flow [2025-03-13 21:43:59,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 158 transitions, 1715 flow, removed 13 selfloop flow, removed 5 redundant places. [2025-03-13 21:43:59,950 INFO L231 Difference]: Finished difference. Result has 126 places, 109 transitions, 1325 flow [2025-03-13 21:43:59,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1325, PETRI_PLACES=126, PETRI_TRANSITIONS=109} [2025-03-13 21:43:59,950 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2025-03-13 21:43:59,950 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 109 transitions, 1325 flow [2025-03-13 21:43:59,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 21:43:59,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:43:59,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:43:59,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-13 21:43:59,951 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:43:59,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:43:59,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1204203037, now seen corresponding path program 1 times [2025-03-13 21:43:59,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:43:59,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699022743] [2025-03-13 21:43:59,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:43:59,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:43:59,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-13 21:43:59,958 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:43:59,958 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:43:59,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:43:59,994 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 21:43:59,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:43:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699022743] [2025-03-13 21:43:59,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699022743] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:43:59,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:43:59,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:43:59,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945747559] [2025-03-13 21:43:59,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:43:59,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:43:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:43:59,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:43:59,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:44:00,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:00,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 109 transitions, 1325 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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 21:44:00,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:00,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:00,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:00,133 INFO L124 PetriNetUnfolderBase]: 715/1351 cut-off events. [2025-03-13 21:44:00,133 INFO L125 PetriNetUnfolderBase]: For 6856/6868 co-relation queries the response was YES. [2025-03-13 21:44:00,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1351 events. 715/1351 cut-off events. For 6856/6868 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7374 event pairs, 419 based on Foata normal form. 46/1397 useless extension candidates. Maximal degree in co-relation 5479. Up to 970 conditions per place. [2025-03-13 21:44:00,141 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 92 selfloop transitions, 7 changer transitions 16/118 dead transitions. [2025-03-13 21:44:00,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 118 transitions, 1507 flow [2025-03-13 21:44:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:44:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:44:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2025-03-13 21:44:00,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2025-03-13 21:44:00,142 INFO L175 Difference]: Start difference. First operand has 126 places, 109 transitions, 1325 flow. Second operand 5 states and 78 transitions. [2025-03-13 21:44:00,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 118 transitions, 1507 flow [2025-03-13 21:44:00,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 118 transitions, 1416 flow, removed 7 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:00,158 INFO L231 Difference]: Finished difference. Result has 123 places, 86 transitions, 862 flow [2025-03-13 21:44:00,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=862, PETRI_PLACES=123, PETRI_TRANSITIONS=86} [2025-03-13 21:44:00,158 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2025-03-13 21:44:00,158 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 86 transitions, 862 flow [2025-03-13 21:44:00,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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 21:44:00,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:00,159 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:00,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-13 21:44:00,159 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:00,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash -553590806, now seen corresponding path program 4 times [2025-03-13 21:44:00,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:00,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043751739] [2025-03-13 21:44:00,159 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:00,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:00,166 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:44:00,170 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:44:00,170 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:44:00,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:00,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:00,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043751739] [2025-03-13 21:44:00,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043751739] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:00,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516885044] [2025-03-13 21:44:00,317 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:00,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:00,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:00,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:00,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:44:00,361 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:44:00,379 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:44:00,379 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:44:00,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:00,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-13 21:44:00,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:00,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516885044] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:00,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:00,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 10] total 26 [2025-03-13 21:44:00,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367400712] [2025-03-13 21:44:00,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:00,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:00,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:00,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2025-03-13 21:44:00,851 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2025-03-13 21:44:00,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 86 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 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 21:44:00,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:00,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2025-03-13 21:44:00,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:01,345 INFO L124 PetriNetUnfolderBase]: 925/1648 cut-off events. [2025-03-13 21:44:01,345 INFO L125 PetriNetUnfolderBase]: For 7419/7427 co-relation queries the response was YES. [2025-03-13 21:44:01,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6904 conditions, 1648 events. 925/1648 cut-off events. For 7419/7427 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8650 event pairs, 159 based on Foata normal form. 6/1654 useless extension candidates. Maximal degree in co-relation 6528. Up to 559 conditions per place. [2025-03-13 21:44:01,354 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 147 selfloop transitions, 54 changer transitions 11/214 dead transitions. [2025-03-13 21:44:01,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 214 transitions, 2036 flow [2025-03-13 21:44:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:44:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:44:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 225 transitions. [2025-03-13 21:44:01,355 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2025-03-13 21:44:01,355 INFO L175 Difference]: Start difference. First operand has 123 places, 86 transitions, 862 flow. Second operand 15 states and 225 transitions. [2025-03-13 21:44:01,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 214 transitions, 2036 flow [2025-03-13 21:44:01,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 214 transitions, 1933 flow, removed 38 selfloop flow, removed 9 redundant places. [2025-03-13 21:44:01,374 INFO L231 Difference]: Finished difference. Result has 130 places, 105 transitions, 1157 flow [2025-03-13 21:44:01,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1157, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2025-03-13 21:44:01,375 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2025-03-13 21:44:01,375 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 1157 flow [2025-03-13 21:44:01,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 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 21:44:01,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:01,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:01,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-13 21:44:01,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-13 21:44:01,580 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:01,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash 2012899856, now seen corresponding path program 5 times [2025-03-13 21:44:01,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:01,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818208537] [2025-03-13 21:44:01,581 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:01,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:01,585 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:44:01,588 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:44:01,588 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:01,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:01,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818208537] [2025-03-13 21:44:01,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818208537] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012220377] [2025-03-13 21:44:01,689 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:01,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:01,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:01,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:01,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:44:01,729 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:44:01,743 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-13 21:44:01,744 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:01,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:01,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:44:01,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:01,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:02,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012220377] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:02,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:02,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2025-03-13 21:44:02,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499029235] [2025-03-13 21:44:02,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:02,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:02,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:02,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:44:02,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:02,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 105 transitions, 1157 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:02,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:02,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:02,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:02,758 INFO L124 PetriNetUnfolderBase]: 796/1442 cut-off events. [2025-03-13 21:44:02,758 INFO L125 PetriNetUnfolderBase]: For 7913/7931 co-relation queries the response was YES. [2025-03-13 21:44:02,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6642 conditions, 1442 events. 796/1442 cut-off events. For 7913/7931 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7545 event pairs, 184 based on Foata normal form. 5/1444 useless extension candidates. Maximal degree in co-relation 6567. Up to 983 conditions per place. [2025-03-13 21:44:02,766 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 30 changer transitions 18/140 dead transitions. [2025-03-13 21:44:02,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 140 transitions, 1578 flow [2025-03-13 21:44:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:44:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:44:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-03-13 21:44:02,767 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3431372549019608 [2025-03-13 21:44:02,767 INFO L175 Difference]: Start difference. First operand has 130 places, 105 transitions, 1157 flow. Second operand 12 states and 140 transitions. [2025-03-13 21:44:02,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 140 transitions, 1578 flow [2025-03-13 21:44:02,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 140 transitions, 1412 flow, removed 29 selfloop flow, removed 13 redundant places. [2025-03-13 21:44:02,785 INFO L231 Difference]: Finished difference. Result has 127 places, 98 transitions, 964 flow [2025-03-13 21:44:02,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=964, PETRI_PLACES=127, PETRI_TRANSITIONS=98} [2025-03-13 21:44:02,786 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2025-03-13 21:44:02,787 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 98 transitions, 964 flow [2025-03-13 21:44:02,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:02,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:02,787 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:02,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:02,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-13 21:44:02,987 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:02,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1645220800, now seen corresponding path program 6 times [2025-03-13 21:44:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:02,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432803840] [2025-03-13 21:44:02,988 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:02,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:02,992 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-13 21:44:02,999 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 21 of 22 statements. [2025-03-13 21:44:02,999 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:02,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:03,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:03,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432803840] [2025-03-13 21:44:03,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432803840] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:03,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:03,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:44:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291940316] [2025-03-13 21:44:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:03,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-13 21:44:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:03,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-13 21:44:03,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:44:03,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:03,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 98 transitions, 964 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 21:44:03,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:03,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:03,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:03,361 INFO L124 PetriNetUnfolderBase]: 767/1376 cut-off events. [2025-03-13 21:44:03,361 INFO L125 PetriNetUnfolderBase]: For 6064/6078 co-relation queries the response was YES. [2025-03-13 21:44:03,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 conditions, 1376 events. 767/1376 cut-off events. For 6064/6078 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7003 event pairs, 184 based on Foata normal form. 1/1374 useless extension candidates. Maximal degree in co-relation 5958. Up to 983 conditions per place. [2025-03-13 21:44:03,369 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 69 selfloop transitions, 25 changer transitions 24/123 dead transitions. [2025-03-13 21:44:03,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 123 transitions, 1293 flow [2025-03-13 21:44:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2025-03-13 21:44:03,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34411764705882353 [2025-03-13 21:44:03,370 INFO L175 Difference]: Start difference. First operand has 127 places, 98 transitions, 964 flow. Second operand 10 states and 117 transitions. [2025-03-13 21:44:03,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 123 transitions, 1293 flow [2025-03-13 21:44:03,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 1222 flow, removed 4 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:03,385 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 851 flow [2025-03-13 21:44:03,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=851, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2025-03-13 21:44:03,386 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2025-03-13 21:44:03,386 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 851 flow [2025-03-13 21:44:03,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 21:44:03,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:03,386 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:03,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-13 21:44:03,387 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:03,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1708104337, now seen corresponding path program 1 times [2025-03-13 21:44:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353131208] [2025-03-13 21:44:03,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:03,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:44:03,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:44:03,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:03,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:03,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:03,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353131208] [2025-03-13 21:44:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353131208] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:03,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:44:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367814764] [2025-03-13 21:44:03,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:03,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:44:03,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:03,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:44:03,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:44:03,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:03,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 851 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 21:44:03,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:03,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:03,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:03,560 INFO L124 PetriNetUnfolderBase]: 536/1019 cut-off events. [2025-03-13 21:44:03,560 INFO L125 PetriNetUnfolderBase]: For 4533/4543 co-relation queries the response was YES. [2025-03-13 21:44:03,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 1019 events. 536/1019 cut-off events. For 4533/4543 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5145 event pairs, 307 based on Foata normal form. 36/1053 useless extension candidates. Maximal degree in co-relation 4291. Up to 565 conditions per place. [2025-03-13 21:44:03,564 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 84 selfloop transitions, 9 changer transitions 6/104 dead transitions. [2025-03-13 21:44:03,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 104 transitions, 1107 flow [2025-03-13 21:44:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:44:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:44:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2025-03-13 21:44:03,565 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4764705882352941 [2025-03-13 21:44:03,565 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 851 flow. Second operand 5 states and 81 transitions. [2025-03-13 21:44:03,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 104 transitions, 1107 flow [2025-03-13 21:44:03,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 934 flow, removed 26 selfloop flow, removed 18 redundant places. [2025-03-13 21:44:03,576 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 592 flow [2025-03-13 21:44:03,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=592, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2025-03-13 21:44:03,577 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2025-03-13 21:44:03,577 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 592 flow [2025-03-13 21:44:03,577 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 21:44:03,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:03,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:03,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-13 21:44:03,577 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:03,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:03,578 INFO L85 PathProgramCache]: Analyzing trace with hash 136161610, now seen corresponding path program 1 times [2025-03-13 21:44:03,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:03,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853515649] [2025-03-13 21:44:03,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:03,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:03,581 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:44:03,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:44:03,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:03,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:03,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:03,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853515649] [2025-03-13 21:44:03,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853515649] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:03,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:03,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:44:03,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322444667] [2025-03-13 21:44:03,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:03,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:44:03,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:03,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:44:03,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:44:03,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:03,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 592 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 21:44:03,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:03,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:03,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:03,704 INFO L124 PetriNetUnfolderBase]: 388/742 cut-off events. [2025-03-13 21:44:03,705 INFO L125 PetriNetUnfolderBase]: For 2248/2261 co-relation queries the response was YES. [2025-03-13 21:44:03,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 742 events. 388/742 cut-off events. For 2248/2261 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3472 event pairs, 231 based on Foata normal form. 24/763 useless extension candidates. Maximal degree in co-relation 2900. Up to 565 conditions per place. [2025-03-13 21:44:03,708 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 48 selfloop transitions, 2 changer transitions 25/80 dead transitions. [2025-03-13 21:44:03,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 716 flow [2025-03-13 21:44:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:44:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:44:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2025-03-13 21:44:03,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4176470588235294 [2025-03-13 21:44:03,709 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 592 flow. Second operand 5 states and 71 transitions. [2025-03-13 21:44:03,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 716 flow [2025-03-13 21:44:03,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 688 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-03-13 21:44:03,714 INFO L231 Difference]: Finished difference. Result has 83 places, 55 transitions, 363 flow [2025-03-13 21:44:03,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2025-03-13 21:44:03,714 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-13 21:44:03,714 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 363 flow [2025-03-13 21:44:03,714 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 21:44:03,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:03,714 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:03,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-13 21:44:03,715 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:03,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1685065887, now seen corresponding path program 1 times [2025-03-13 21:44:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:03,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357919468] [2025-03-13 21:44:03,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:03,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:03,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:44:03,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:44:03,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:03,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:03,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:03,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357919468] [2025-03-13 21:44:03,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357919468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:03,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883195437] [2025-03-13 21:44:03,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:03,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:03,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:03,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:44:03,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:44:03,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:44:03,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:03,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:03,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:44:03,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:03,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:03,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883195437] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:03,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:03,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-03-13 21:44:03,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745274263] [2025-03-13 21:44:03,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:03,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:03,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:03,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:03,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:44:04,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2025-03-13 21:44:04,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 363 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 21:44:04,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:04,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2025-03-13 21:44:04,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:04,098 INFO L124 PetriNetUnfolderBase]: 442/763 cut-off events. [2025-03-13 21:44:04,098 INFO L125 PetriNetUnfolderBase]: For 1324/1341 co-relation queries the response was YES. [2025-03-13 21:44:04,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2842 conditions, 763 events. 442/763 cut-off events. For 1324/1341 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3201 event pairs, 202 based on Foata normal form. 32/792 useless extension candidates. Maximal degree in co-relation 2816. Up to 487 conditions per place. [2025-03-13 21:44:04,102 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 63 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2025-03-13 21:44:04,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 657 flow [2025-03-13 21:44:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:44:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:44:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2025-03-13 21:44:04,103 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28991596638655465 [2025-03-13 21:44:04,103 INFO L175 Difference]: Start difference. First operand has 83 places, 55 transitions, 363 flow. Second operand 7 states and 69 transitions. [2025-03-13 21:44:04,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 657 flow [2025-03-13 21:44:04,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 635 flow, removed 9 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:04,107 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 394 flow [2025-03-13 21:44:04,107 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2025-03-13 21:44:04,107 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2025-03-13 21:44:04,107 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 394 flow [2025-03-13 21:44:04,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 21:44:04,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:04,107 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 21:44:04,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:04,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:04,308 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:04,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -59343566, now seen corresponding path program 1 times [2025-03-13 21:44:04,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:04,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271978643] [2025-03-13 21:44:04,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:04,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:04,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:44:04,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:44:04,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:04,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:04,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271978643] [2025-03-13 21:44:04,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271978643] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205202034] [2025-03-13 21:44:04,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:04,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:04,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:04,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:44:04,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:44:04,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:44:04,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:04,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:04,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:44:04,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:04,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:04,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205202034] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:04,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:04,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2025-03-13 21:44:04,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325055625] [2025-03-13 21:44:04,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:04,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:04,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:04,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:04,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:44:04,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2025-03-13 21:44:04,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 394 flow. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 21:44:04,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:04,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2025-03-13 21:44:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:04,634 INFO L124 PetriNetUnfolderBase]: 329/570 cut-off events. [2025-03-13 21:44:04,635 INFO L125 PetriNetUnfolderBase]: For 1351/1363 co-relation queries the response was YES. [2025-03-13 21:44:04,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 570 events. 329/570 cut-off events. For 1351/1363 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2116 event pairs, 161 based on Foata normal form. 18/585 useless extension candidates. Maximal degree in co-relation 2295. Up to 392 conditions per place. [2025-03-13 21:44:04,637 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 47 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2025-03-13 21:44:04,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 517 flow [2025-03-13 21:44:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:44:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:44:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2025-03-13 21:44:04,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2025-03-13 21:44:04,638 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 394 flow. Second operand 7 states and 70 transitions. [2025-03-13 21:44:04,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 517 flow [2025-03-13 21:44:04,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 61 transitions, 494 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-03-13 21:44:04,641 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 335 flow [2025-03-13 21:44:04,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2025-03-13 21:44:04,641 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2025-03-13 21:44:04,641 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 335 flow [2025-03-13 21:44:04,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 21:44:04,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:04,641 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] [2025-03-13 21:44:04,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:04,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-13 21:44:04,842 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:04,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 564555842, now seen corresponding path program 1 times [2025-03-13 21:44:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041925640] [2025-03-13 21:44:04,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:04,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:44:04,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:04,884 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:04,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:05,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:05,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041925640] [2025-03-13 21:44:05,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041925640] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:05,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550325910] [2025-03-13 21:44:05,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:05,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:05,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:05,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-13 21:44:05,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:44:05,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:05,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:05,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:05,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-13 21:44:05,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:05,895 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-13 21:44:05,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2025-03-13 21:44:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:05,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:06,313 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:44:06,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2025-03-13 21:44:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:06,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550325910] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:06,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:06,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2025-03-13 21:44:06,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246872550] [2025-03-13 21:44:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:06,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:06,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:06,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:06,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2025-03-13 21:44:06,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:06,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 335 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:06,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:06,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:06,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:07,090 INFO L124 PetriNetUnfolderBase]: 483/840 cut-off events. [2025-03-13 21:44:07,091 INFO L125 PetriNetUnfolderBase]: For 2070/2117 co-relation queries the response was YES. [2025-03-13 21:44:07,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3371 conditions, 840 events. 483/840 cut-off events. For 2070/2117 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3652 event pairs, 65 based on Foata normal form. 5/840 useless extension candidates. Maximal degree in co-relation 3351. Up to 337 conditions per place. [2025-03-13 21:44:07,094 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 101 selfloop transitions, 32 changer transitions 10/146 dead transitions. [2025-03-13 21:44:07,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 146 transitions, 1139 flow [2025-03-13 21:44:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:44:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:44:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 196 transitions. [2025-03-13 21:44:07,095 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-03-13 21:44:07,095 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 335 flow. Second operand 14 states and 196 transitions. [2025-03-13 21:44:07,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 146 transitions, 1139 flow [2025-03-13 21:44:07,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 146 transitions, 1119 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:07,101 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 621 flow [2025-03-13 21:44:07,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=621, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2025-03-13 21:44:07,101 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2025-03-13 21:44:07,101 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 621 flow [2025-03-13 21:44:07,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:07,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:07,102 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] [2025-03-13 21:44:07,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-13 21:44:07,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:07,303 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:07,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1386061524, now seen corresponding path program 2 times [2025-03-13 21:44:07,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:07,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463834977] [2025-03-13 21:44:07,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:07,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:07,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:07,327 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 25 statements. [2025-03-13 21:44:07,328 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:07,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:07,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:07,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463834977] [2025-03-13 21:44:07,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463834977] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:07,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:07,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-13 21:44:07,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997851344] [2025-03-13 21:44:07,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:07,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:44:07,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:07,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:44:07,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:44:07,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:07,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 621 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:07,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:07,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:07,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:07,980 INFO L124 PetriNetUnfolderBase]: 572/995 cut-off events. [2025-03-13 21:44:07,980 INFO L125 PetriNetUnfolderBase]: For 5076/5097 co-relation queries the response was YES. [2025-03-13 21:44:07,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4795 conditions, 995 events. 572/995 cut-off events. For 5076/5097 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4535 event pairs, 245 based on Foata normal form. 1/993 useless extension candidates. Maximal degree in co-relation 4766. Up to 664 conditions per place. [2025-03-13 21:44:07,984 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 80 selfloop transitions, 31 changer transitions 17/131 dead transitions. [2025-03-13 21:44:07,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 1420 flow [2025-03-13 21:44:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:44:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:44:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2025-03-13 21:44:07,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3393665158371041 [2025-03-13 21:44:07,985 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 621 flow. Second operand 13 states and 150 transitions. [2025-03-13 21:44:07,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 1420 flow [2025-03-13 21:44:07,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 131 transitions, 1327 flow, removed 36 selfloop flow, removed 4 redundant places. [2025-03-13 21:44:07,995 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 950 flow [2025-03-13 21:44:07,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=950, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2025-03-13 21:44:07,996 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2025-03-13 21:44:07,996 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 950 flow [2025-03-13 21:44:07,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:07,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:07,997 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] [2025-03-13 21:44:07,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-13 21:44:07,997 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:07,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:07,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1667808228, now seen corresponding path program 3 times [2025-03-13 21:44:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:07,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663052616] [2025-03-13 21:44:07,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:08,004 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:08,020 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 23 of 25 statements. [2025-03-13 21:44:08,020 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:08,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:08,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663052616] [2025-03-13 21:44:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663052616] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:08,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:08,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-13 21:44:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545534653] [2025-03-13 21:44:08,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:08,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:44:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:08,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:44:08,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:44:08,361 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:08,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 950 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:08,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:08,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:08,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:08,824 INFO L124 PetriNetUnfolderBase]: 557/968 cut-off events. [2025-03-13 21:44:08,824 INFO L125 PetriNetUnfolderBase]: For 5358/5389 co-relation queries the response was YES. [2025-03-13 21:44:08,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4843 conditions, 968 events. 557/968 cut-off events. For 5358/5389 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4400 event pairs, 181 based on Foata normal form. 5/971 useless extension candidates. Maximal degree in co-relation 4811. Up to 466 conditions per place. [2025-03-13 21:44:08,829 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 102 selfloop transitions, 27 changer transitions 18/150 dead transitions. [2025-03-13 21:44:08,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 150 transitions, 1590 flow [2025-03-13 21:44:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:44:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:44:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 171 transitions. [2025-03-13 21:44:08,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3352941176470588 [2025-03-13 21:44:08,830 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 950 flow. Second operand 15 states and 171 transitions. [2025-03-13 21:44:08,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 150 transitions, 1590 flow [2025-03-13 21:44:08,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 150 transitions, 1479 flow, removed 54 selfloop flow, removed 3 redundant places. [2025-03-13 21:44:08,840 INFO L231 Difference]: Finished difference. Result has 106 places, 89 transitions, 924 flow [2025-03-13 21:44:08,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=924, PETRI_PLACES=106, PETRI_TRANSITIONS=89} [2025-03-13 21:44:08,840 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2025-03-13 21:44:08,840 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 89 transitions, 924 flow [2025-03-13 21:44:08,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:08,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:08,841 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] [2025-03-13 21:44:08,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-13 21:44:08,841 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:08,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash -528428934, now seen corresponding path program 4 times [2025-03-13 21:44:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:08,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277067032] [2025-03-13 21:44:08,842 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:08,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:08,846 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:08,857 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:08,857 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:44:08,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:09,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277067032] [2025-03-13 21:44:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277067032] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:09,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861406684] [2025-03-13 21:44:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:09,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:09,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:09,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:09,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:44:09,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:09,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 89 transitions, 924 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:09,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:09,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:09,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:09,459 INFO L124 PetriNetUnfolderBase]: 576/1003 cut-off events. [2025-03-13 21:44:09,459 INFO L125 PetriNetUnfolderBase]: For 5778/5809 co-relation queries the response was YES. [2025-03-13 21:44:09,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5195 conditions, 1003 events. 576/1003 cut-off events. For 5778/5809 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4611 event pairs, 237 based on Foata normal form. 1/1002 useless extension candidates. Maximal degree in co-relation 5159. Up to 678 conditions per place. [2025-03-13 21:44:09,465 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 80 selfloop transitions, 42 changer transitions 17/142 dead transitions. [2025-03-13 21:44:09,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 142 transitions, 1689 flow [2025-03-13 21:44:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2025-03-13 21:44:09,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2025-03-13 21:44:09,466 INFO L175 Difference]: Start difference. First operand has 106 places, 89 transitions, 924 flow. Second operand 11 states and 136 transitions. [2025-03-13 21:44:09,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 142 transitions, 1689 flow [2025-03-13 21:44:09,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 142 transitions, 1584 flow, removed 18 selfloop flow, removed 8 redundant places. [2025-03-13 21:44:09,479 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 1207 flow [2025-03-13 21:44:09,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1207, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2025-03-13 21:44:09,479 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2025-03-13 21:44:09,479 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 1207 flow [2025-03-13 21:44:09,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:09,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:09,479 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] [2025-03-13 21:44:09,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-13 21:44:09,480 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:09,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1627444338, now seen corresponding path program 5 times [2025-03-13 21:44:09,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:09,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804734305] [2025-03-13 21:44:09,480 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:09,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:09,485 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:09,495 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:09,496 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:09,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:10,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:10,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804734305] [2025-03-13 21:44:10,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804734305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:10,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590553575] [2025-03-13 21:44:10,033 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:10,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:10,035 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:10,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-13 21:44:10,073 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:10,090 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:10,090 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:10,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:10,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-13 21:44:10,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:10,445 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-13 21:44:10,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2025-03-13 21:44:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:10,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:10,824 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:44:10,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2025-03-13 21:44:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590553575] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:10,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:10,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2025-03-13 21:44:10,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586054036] [2025-03-13 21:44:10,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:10,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:10,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:10,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:10,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2025-03-13 21:44:10,907 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:10,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 1207 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:10,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:10,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:10,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:11,578 INFO L124 PetriNetUnfolderBase]: 581/1004 cut-off events. [2025-03-13 21:44:11,578 INFO L125 PetriNetUnfolderBase]: For 6560/6615 co-relation queries the response was YES. [2025-03-13 21:44:11,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 1004 events. 581/1004 cut-off events. For 6560/6615 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4550 event pairs, 82 based on Foata normal form. 9/1010 useless extension candidates. Maximal degree in co-relation 5395. Up to 563 conditions per place. [2025-03-13 21:44:11,583 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 102 selfloop transitions, 58 changer transitions 11/174 dead transitions. [2025-03-13 21:44:11,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 2070 flow [2025-03-13 21:44:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:44:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:44:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 196 transitions. [2025-03-13 21:44:11,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3843137254901961 [2025-03-13 21:44:11,584 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 1207 flow. Second operand 15 states and 196 transitions. [2025-03-13 21:44:11,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 2070 flow [2025-03-13 21:44:11,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 174 transitions, 1962 flow, removed 30 selfloop flow, removed 4 redundant places. [2025-03-13 21:44:11,597 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 1452 flow [2025-03-13 21:44:11,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1452, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2025-03-13 21:44:11,598 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2025-03-13 21:44:11,598 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 1452 flow [2025-03-13 21:44:11,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:11,598 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:11,598 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] [2025-03-13 21:44:11,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-13 21:44:11,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-13 21:44:11,798 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:11,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1740241814, now seen corresponding path program 6 times [2025-03-13 21:44:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:11,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595427264] [2025-03-13 21:44:11,799 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:11,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:11,815 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 23 of 25 statements. [2025-03-13 21:44:11,819 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:11,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:12,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595427264] [2025-03-13 21:44:12,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595427264] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:12,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:12,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-13 21:44:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782631192] [2025-03-13 21:44:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:12,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:44:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:12,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:44:12,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:44:12,094 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:12,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 1452 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:12,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:12,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:12,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:12,412 INFO L124 PetriNetUnfolderBase]: 585/1025 cut-off events. [2025-03-13 21:44:12,412 INFO L125 PetriNetUnfolderBase]: For 6923/6958 co-relation queries the response was YES. [2025-03-13 21:44:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5614 conditions, 1025 events. 585/1025 cut-off events. For 6923/6958 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4805 event pairs, 242 based on Foata normal form. 1/1023 useless extension candidates. Maximal degree in co-relation 5570. Up to 701 conditions per place. [2025-03-13 21:44:12,417 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 80 selfloop transitions, 45 changer transitions 18/146 dead transitions. [2025-03-13 21:44:12,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 146 transitions, 1965 flow [2025-03-13 21:44:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:44:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:44:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2025-03-13 21:44:12,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33578431372549017 [2025-03-13 21:44:12,417 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 1452 flow. Second operand 12 states and 137 transitions. [2025-03-13 21:44:12,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 146 transitions, 1965 flow [2025-03-13 21:44:12,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 146 transitions, 1823 flow, removed 32 selfloop flow, removed 8 redundant places. [2025-03-13 21:44:12,433 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 1404 flow [2025-03-13 21:44:12,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1404, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2025-03-13 21:44:12,434 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2025-03-13 21:44:12,434 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 1404 flow [2025-03-13 21:44:12,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:12,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:12,434 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] [2025-03-13 21:44:12,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-13 21:44:12,434 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:12,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash 353413426, now seen corresponding path program 7 times [2025-03-13 21:44:12,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:12,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569544620] [2025-03-13 21:44:12,434 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:12,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:12,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:44:12,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:12,451 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:12,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569544620] [2025-03-13 21:44:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569544620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952691373] [2025-03-13 21:44:12,869 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:12,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:12,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:12,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:12,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-13 21:44:12,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:44:12,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:12,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:12,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:12,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-13 21:44:12,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:13,141 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-13 21:44:13,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2025-03-13 21:44:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:13,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:13,652 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:44:13,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2025-03-13 21:44:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952691373] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:13,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:13,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2025-03-13 21:44:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418227305] [2025-03-13 21:44:13,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:13,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:13,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:13,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2025-03-13 21:44:13,732 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:13,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 1404 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:13,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:13,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:13,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:14,380 INFO L124 PetriNetUnfolderBase]: 557/969 cut-off events. [2025-03-13 21:44:14,380 INFO L125 PetriNetUnfolderBase]: For 6367/6422 co-relation queries the response was YES. [2025-03-13 21:44:14,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5233 conditions, 969 events. 557/969 cut-off events. For 6367/6422 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4400 event pairs, 85 based on Foata normal form. 9/976 useless extension candidates. Maximal degree in co-relation 5189. Up to 546 conditions per place. [2025-03-13 21:44:14,385 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 55 changer transitions 11/165 dead transitions. [2025-03-13 21:44:14,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 165 transitions, 2015 flow [2025-03-13 21:44:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:44:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:44:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 182 transitions. [2025-03-13 21:44:14,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2025-03-13 21:44:14,386 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 1404 flow. Second operand 14 states and 182 transitions. [2025-03-13 21:44:14,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 165 transitions, 2015 flow [2025-03-13 21:44:14,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 165 transitions, 1965 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:14,401 INFO L231 Difference]: Finished difference. Result has 131 places, 109 transitions, 1430 flow [2025-03-13 21:44:14,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1430, PETRI_PLACES=131, PETRI_TRANSITIONS=109} [2025-03-13 21:44:14,401 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2025-03-13 21:44:14,401 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 109 transitions, 1430 flow [2025-03-13 21:44:14,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:14,402 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:14,402 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] [2025-03-13 21:44:14,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:14,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-13 21:44:14,603 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:14,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1064751226, now seen corresponding path program 8 times [2025-03-13 21:44:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418882564] [2025-03-13 21:44:14,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:14,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:14,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:14,619 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 25 statements. [2025-03-13 21:44:14,620 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:14,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418882564] [2025-03-13 21:44:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418882564] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:14,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:14,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-13 21:44:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131827233] [2025-03-13 21:44:14,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:14,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:44:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:14,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:44:14,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:44:14,893 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:14,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 109 transitions, 1430 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:14,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:14,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:14,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:15,393 INFO L124 PetriNetUnfolderBase]: 726/1240 cut-off events. [2025-03-13 21:44:15,394 INFO L125 PetriNetUnfolderBase]: For 10249/10287 co-relation queries the response was YES. [2025-03-13 21:44:15,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7234 conditions, 1240 events. 726/1240 cut-off events. For 10249/10287 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5845 event pairs, 236 based on Foata normal form. 1/1240 useless extension candidates. Maximal degree in co-relation 7190. Up to 748 conditions per place. [2025-03-13 21:44:15,399 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 123 selfloop transitions, 57 changer transitions 15/198 dead transitions. [2025-03-13 21:44:15,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 198 transitions, 2789 flow [2025-03-13 21:44:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:44:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:44:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 164 transitions. [2025-03-13 21:44:15,400 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3215686274509804 [2025-03-13 21:44:15,400 INFO L175 Difference]: Start difference. First operand has 131 places, 109 transitions, 1430 flow. Second operand 15 states and 164 transitions. [2025-03-13 21:44:15,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 198 transitions, 2789 flow [2025-03-13 21:44:15,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 198 transitions, 2609 flow, removed 1 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:15,417 INFO L231 Difference]: Finished difference. Result has 137 places, 134 transitions, 1904 flow [2025-03-13 21:44:15,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1904, PETRI_PLACES=137, PETRI_TRANSITIONS=134} [2025-03-13 21:44:15,417 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2025-03-13 21:44:15,417 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 134 transitions, 1904 flow [2025-03-13 21:44:15,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:15,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:15,418 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] [2025-03-13 21:44:15,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-13 21:44:15,418 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:15,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash 204065804, now seen corresponding path program 9 times [2025-03-13 21:44:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:15,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378808434] [2025-03-13 21:44:15,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:15,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:15,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:15,430 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 23 of 25 statements. [2025-03-13 21:44:15,431 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:15,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:15,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:15,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378808434] [2025-03-13 21:44:15,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378808434] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:15,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:15,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-13 21:44:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490865646] [2025-03-13 21:44:15,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:15,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:44:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:15,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:44:15,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:44:15,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:15,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 134 transitions, 1904 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:15,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:15,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:15,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:16,079 INFO L124 PetriNetUnfolderBase]: 719/1233 cut-off events. [2025-03-13 21:44:16,079 INFO L125 PetriNetUnfolderBase]: For 11885/11923 co-relation queries the response was YES. [2025-03-13 21:44:16,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7587 conditions, 1233 events. 719/1233 cut-off events. For 11885/11923 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5798 event pairs, 245 based on Foata normal form. 1/1234 useless extension candidates. Maximal degree in co-relation 7536. Up to 748 conditions per place. [2025-03-13 21:44:16,086 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 113 selfloop transitions, 59 changer transitions 15/190 dead transitions. [2025-03-13 21:44:16,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 2851 flow [2025-03-13 21:44:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:44:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:44:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2025-03-13 21:44:16,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34068627450980393 [2025-03-13 21:44:16,086 INFO L175 Difference]: Start difference. First operand has 137 places, 134 transitions, 1904 flow. Second operand 12 states and 139 transitions. [2025-03-13 21:44:16,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 2851 flow [2025-03-13 21:44:16,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 190 transitions, 2734 flow, removed 57 selfloop flow, removed 4 redundant places. [2025-03-13 21:44:16,116 INFO L231 Difference]: Finished difference. Result has 148 places, 151 transitions, 2281 flow [2025-03-13 21:44:16,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2281, PETRI_PLACES=148, PETRI_TRANSITIONS=151} [2025-03-13 21:44:16,117 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2025-03-13 21:44:16,117 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 151 transitions, 2281 flow [2025-03-13 21:44:16,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:16,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:16,117 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] [2025-03-13 21:44:16,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-13 21:44:16,117 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:16,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1424781892, now seen corresponding path program 10 times [2025-03-13 21:44:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:16,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993537201] [2025-03-13 21:44:16,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:16,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:16,122 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:16,128 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:16,128 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:44:16,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:16,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993537201] [2025-03-13 21:44:16,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993537201] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:16,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:16,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142256591] [2025-03-13 21:44:16,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:16,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:16,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:16,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:44:16,379 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:16,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 151 transitions, 2281 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:16,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:16,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:16,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:16,886 INFO L124 PetriNetUnfolderBase]: 791/1388 cut-off events. [2025-03-13 21:44:16,886 INFO L125 PetriNetUnfolderBase]: For 13578/13620 co-relation queries the response was YES. [2025-03-13 21:44:16,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8497 conditions, 1388 events. 791/1388 cut-off events. For 13578/13620 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6889 event pairs, 249 based on Foata normal form. 1/1389 useless extension candidates. Maximal degree in co-relation 8441. Up to 691 conditions per place. [2025-03-13 21:44:16,894 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 136 selfloop transitions, 60 changer transitions 17/216 dead transitions. [2025-03-13 21:44:16,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 216 transitions, 3275 flow [2025-03-13 21:44:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:44:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:44:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 155 transitions. [2025-03-13 21:44:16,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3506787330316742 [2025-03-13 21:44:16,895 INFO L175 Difference]: Start difference. First operand has 148 places, 151 transitions, 2281 flow. Second operand 13 states and 155 transitions. [2025-03-13 21:44:16,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 216 transitions, 3275 flow [2025-03-13 21:44:16,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 216 transitions, 3037 flow, removed 69 selfloop flow, removed 6 redundant places. [2025-03-13 21:44:16,930 INFO L231 Difference]: Finished difference. Result has 159 places, 158 transitions, 2371 flow [2025-03-13 21:44:16,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2371, PETRI_PLACES=159, PETRI_TRANSITIONS=158} [2025-03-13 21:44:16,930 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2025-03-13 21:44:16,930 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 158 transitions, 2371 flow [2025-03-13 21:44:16,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:16,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:16,931 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] [2025-03-13 21:44:16,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-03-13 21:44:16,931 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:16,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash -612099310, now seen corresponding path program 11 times [2025-03-13 21:44:16,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:16,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756094717] [2025-03-13 21:44:16,931 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:16,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:16,936 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:16,944 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:16,944 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:16,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:17,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:17,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756094717] [2025-03-13 21:44:17,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756094717] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:17,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629183090] [2025-03-13 21:44:17,476 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:17,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:17,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:17,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:17,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-13 21:44:17,522 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:17,539 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:17,539 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:17,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:17,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-13 21:44:17,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:17,744 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-13 21:44:17,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2025-03-13 21:44:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:17,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:18,252 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:18,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2025-03-13 21:44:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:18,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629183090] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:18,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:18,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2025-03-13 21:44:18,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552687756] [2025-03-13 21:44:18,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:18,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:18,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:18,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:18,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2025-03-13 21:44:18,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:18,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 158 transitions, 2371 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:18,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:18,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:18,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:19,080 INFO L124 PetriNetUnfolderBase]: 820/1439 cut-off events. [2025-03-13 21:44:19,081 INFO L125 PetriNetUnfolderBase]: For 14316/14378 co-relation queries the response was YES. [2025-03-13 21:44:19,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8715 conditions, 1439 events. 820/1439 cut-off events. For 14316/14378 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7193 event pairs, 123 based on Foata normal form. 5/1443 useless extension candidates. Maximal degree in co-relation 8654. Up to 744 conditions per place. [2025-03-13 21:44:19,089 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 98 changer transitions 20/229 dead transitions. [2025-03-13 21:44:19,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 229 transitions, 3401 flow [2025-03-13 21:44:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-13 21:44:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-13 21:44:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 203 transitions. [2025-03-13 21:44:19,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35121107266435986 [2025-03-13 21:44:19,090 INFO L175 Difference]: Start difference. First operand has 159 places, 158 transitions, 2371 flow. Second operand 17 states and 203 transitions. [2025-03-13 21:44:19,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 229 transitions, 3401 flow [2025-03-13 21:44:19,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 229 transitions, 3296 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:19,125 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 2693 flow [2025-03-13 21:44:19,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2693, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2025-03-13 21:44:19,126 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2025-03-13 21:44:19,126 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 2693 flow [2025-03-13 21:44:19,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:19,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:19,126 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] [2025-03-13 21:44:19,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-13 21:44:19,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-03-13 21:44:19,326 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:19,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2136905218, now seen corresponding path program 12 times [2025-03-13 21:44:19,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:19,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211476264] [2025-03-13 21:44:19,327 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:19,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:19,331 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:19,336 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 23 of 25 statements. [2025-03-13 21:44:19,336 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:19,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:19,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:19,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211476264] [2025-03-13 21:44:19,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211476264] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:19,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-13 21:44:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118264989] [2025-03-13 21:44:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:19,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:44:19,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:19,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:44:19,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:44:19,688 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:19,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 2693 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:19,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:19,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:19,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:20,138 INFO L124 PetriNetUnfolderBase]: 796/1397 cut-off events. [2025-03-13 21:44:20,138 INFO L125 PetriNetUnfolderBase]: For 13952/14014 co-relation queries the response was YES. [2025-03-13 21:44:20,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8686 conditions, 1397 events. 796/1397 cut-off events. For 13952/14014 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6924 event pairs, 297 based on Foata normal form. 1/1397 useless extension candidates. Maximal degree in co-relation 8623. Up to 884 conditions per place. [2025-03-13 21:44:20,149 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 119 selfloop transitions, 72 changer transitions 11/205 dead transitions. [2025-03-13 21:44:20,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 205 transitions, 3327 flow [2025-03-13 21:44:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:44:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:44:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 152 transitions. [2025-03-13 21:44:20,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31932773109243695 [2025-03-13 21:44:20,150 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 2693 flow. Second operand 14 states and 152 transitions. [2025-03-13 21:44:20,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 205 transitions, 3327 flow [2025-03-13 21:44:20,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 205 transitions, 3232 flow, removed 32 selfloop flow, removed 4 redundant places. [2025-03-13 21:44:20,196 INFO L231 Difference]: Finished difference. Result has 180 places, 170 transitions, 2792 flow [2025-03-13 21:44:20,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2792, PETRI_PLACES=180, PETRI_TRANSITIONS=170} [2025-03-13 21:44:20,196 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2025-03-13 21:44:20,196 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 170 transitions, 2792 flow [2025-03-13 21:44:20,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:20,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:20,197 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] [2025-03-13 21:44:20,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-03-13 21:44:20,197 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:20,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1592063144, now seen corresponding path program 13 times [2025-03-13 21:44:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:20,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836748696] [2025-03-13 21:44:20,197 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:20,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:20,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:44:20,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:20,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:20,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:20,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:20,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836748696] [2025-03-13 21:44:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836748696] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724052276] [2025-03-13 21:44:20,708 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:20,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:20,710 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:20,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-13 21:44:20,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:44:20,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:44:20,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:20,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:20,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-13 21:44:20,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:20,996 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-13 21:44:20,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2025-03-13 21:44:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:44:21,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:21,317 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:21,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2025-03-13 21:44:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:21,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724052276] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:21,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:21,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2025-03-13 21:44:21,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581556772] [2025-03-13 21:44:21,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:21,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:44:21,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:21,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:44:21,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2025-03-13 21:44:21,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:21,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 170 transitions, 2792 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:21,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:21,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:21,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:21,964 INFO L124 PetriNetUnfolderBase]: 779/1363 cut-off events. [2025-03-13 21:44:21,964 INFO L125 PetriNetUnfolderBase]: For 14314/14376 co-relation queries the response was YES. [2025-03-13 21:44:21,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8605 conditions, 1363 events. 779/1363 cut-off events. For 14314/14376 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6680 event pairs, 117 based on Foata normal form. 5/1368 useless extension candidates. Maximal degree in co-relation 8540. Up to 728 conditions per place. [2025-03-13 21:44:21,989 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 102 selfloop transitions, 95 changer transitions 9/209 dead transitions. [2025-03-13 21:44:21,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 209 transitions, 3401 flow [2025-03-13 21:44:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:44:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:44:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 166 transitions. [2025-03-13 21:44:21,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3755656108597285 [2025-03-13 21:44:21,990 INFO L175 Difference]: Start difference. First operand has 180 places, 170 transitions, 2792 flow. Second operand 13 states and 166 transitions. [2025-03-13 21:44:21,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 209 transitions, 3401 flow [2025-03-13 21:44:22,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 209 transitions, 3274 flow, removed 16 selfloop flow, removed 10 redundant places. [2025-03-13 21:44:22,030 INFO L231 Difference]: Finished difference. Result has 181 places, 168 transitions, 2825 flow [2025-03-13 21:44:22,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2825, PETRI_PLACES=181, PETRI_TRANSITIONS=168} [2025-03-13 21:44:22,031 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2025-03-13 21:44:22,031 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 168 transitions, 2825 flow [2025-03-13 21:44:22,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 21:44:22,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:22,031 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] [2025-03-13 21:44:22,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-13 21:44:22,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-13 21:44:22,232 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:22,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash -948694250, now seen corresponding path program 14 times [2025-03-13 21:44:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847485186] [2025-03-13 21:44:22,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:22,238 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:44:22,245 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 25 statements. [2025-03-13 21:44:22,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:22,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:22,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847485186] [2025-03-13 21:44:22,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847485186] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:22,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:22,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-13 21:44:22,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275191077] [2025-03-13 21:44:22,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:22,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:44:22,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:22,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:44:22,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:44:22,662 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:22,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 168 transitions, 2825 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:22,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:22,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:22,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:23,029 INFO L124 PetriNetUnfolderBase]: 766/1333 cut-off events. [2025-03-13 21:44:23,029 INFO L125 PetriNetUnfolderBase]: For 14331/14393 co-relation queries the response was YES. [2025-03-13 21:44:23,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8559 conditions, 1333 events. 766/1333 cut-off events. For 14331/14393 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6482 event pairs, 281 based on Foata normal form. 1/1333 useless extension candidates. Maximal degree in co-relation 8498. Up to 836 conditions per place. [2025-03-13 21:44:23,038 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 114 selfloop transitions, 65 changer transitions 15/197 dead transitions. [2025-03-13 21:44:23,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 197 transitions, 3332 flow [2025-03-13 21:44:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:44:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:44:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2025-03-13 21:44:23,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3167420814479638 [2025-03-13 21:44:23,039 INFO L175 Difference]: Start difference. First operand has 181 places, 168 transitions, 2825 flow. Second operand 13 states and 140 transitions. [2025-03-13 21:44:23,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 197 transitions, 3332 flow [2025-03-13 21:44:23,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 197 transitions, 3183 flow, removed 2 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:23,083 INFO L231 Difference]: Finished difference. Result has 179 places, 162 transitions, 2693 flow [2025-03-13 21:44:23,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2693, PETRI_PLACES=179, PETRI_TRANSITIONS=162} [2025-03-13 21:44:23,083 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2025-03-13 21:44:23,083 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 162 transitions, 2693 flow [2025-03-13 21:44:23,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 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 21:44:23,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:23,083 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] [2025-03-13 21:44:23,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-03-13 21:44:23,083 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:23,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1230901079, now seen corresponding path program 1 times [2025-03-13 21:44:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:23,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275589069] [2025-03-13 21:44:23,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:23,093 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:23,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:23,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:23,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:23,280 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 21:44:23,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275589069] [2025-03-13 21:44:23,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275589069] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206015574] [2025-03-13 21:44:23,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:23,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:23,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:23,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-13 21:44:23,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:23,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:23,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:23,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:23,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:44:23,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:23,392 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:44:23,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-03-13 21:44:23,397 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 21:44:23,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:23,445 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:44:23,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:44:23,452 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 21:44:23,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206015574] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:23,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:23,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2025-03-13 21:44:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091580893] [2025-03-13 21:44:23,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:23,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-13 21:44:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:23,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-13 21:44:23,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:44:23,471 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:23,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 162 transitions, 2693 flow. Second operand has 17 states, 17 states have (on average 7.823529411764706) internal successors, (133), 17 states have internal predecessors, (133), 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 21:44:23,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:23,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:23,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:23,806 INFO L124 PetriNetUnfolderBase]: 791/1375 cut-off events. [2025-03-13 21:44:23,807 INFO L125 PetriNetUnfolderBase]: For 16873/16929 co-relation queries the response was YES. [2025-03-13 21:44:23,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8798 conditions, 1375 events. 791/1375 cut-off events. For 16873/16929 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6787 event pairs, 151 based on Foata normal form. 20/1395 useless extension candidates. Maximal degree in co-relation 8738. Up to 580 conditions per place. [2025-03-13 21:44:23,814 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 155 selfloop transitions, 62 changer transitions 0/220 dead transitions. [2025-03-13 21:44:23,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 220 transitions, 3622 flow [2025-03-13 21:44:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2025-03-13 21:44:23,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38823529411764707 [2025-03-13 21:44:23,815 INFO L175 Difference]: Start difference. First operand has 179 places, 162 transitions, 2693 flow. Second operand 10 states and 132 transitions. [2025-03-13 21:44:23,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 220 transitions, 3622 flow [2025-03-13 21:44:23,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 220 transitions, 3367 flow, removed 2 selfloop flow, removed 13 redundant places. [2025-03-13 21:44:23,853 INFO L231 Difference]: Finished difference. Result has 170 places, 165 transitions, 2646 flow [2025-03-13 21:44:23,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2646, PETRI_PLACES=170, PETRI_TRANSITIONS=165} [2025-03-13 21:44:23,853 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2025-03-13 21:44:23,853 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 165 transitions, 2646 flow [2025-03-13 21:44:23,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.823529411764706) internal successors, (133), 17 states have internal predecessors, (133), 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 21:44:23,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:23,853 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] [2025-03-13 21:44:23,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:24,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:24,054 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:24,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 500700370, now seen corresponding path program 1 times [2025-03-13 21:44:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:24,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240919528] [2025-03-13 21:44:24,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:24,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:24,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:24,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:24,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:24,261 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 21:44:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240919528] [2025-03-13 21:44:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240919528] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510613965] [2025-03-13 21:44:24,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:24,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:24,264 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:24,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-13 21:44:24,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:24,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:24,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:24,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:24,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:44:24,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:24,360 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:44:24,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-03-13 21:44:24,365 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 21:44:24,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:24,414 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:24,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:24,429 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 21:44:24,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510613965] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:24,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:24,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:44:24,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969942480] [2025-03-13 21:44:24,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:24,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:44:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:24,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:44:24,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:24,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:24,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 165 transitions, 2646 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 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 21:44:24,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:24,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:24,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:24,750 INFO L124 PetriNetUnfolderBase]: 869/1491 cut-off events. [2025-03-13 21:44:24,750 INFO L125 PetriNetUnfolderBase]: For 17106/17161 co-relation queries the response was YES. [2025-03-13 21:44:24,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9804 conditions, 1491 events. 869/1491 cut-off events. For 17106/17161 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7461 event pairs, 345 based on Foata normal form. 10/1497 useless extension candidates. Maximal degree in co-relation 9743. Up to 1047 conditions per place. [2025-03-13 21:44:24,758 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 135 selfloop transitions, 66 changer transitions 0/204 dead transitions. [2025-03-13 21:44:24,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 204 transitions, 3545 flow [2025-03-13 21:44:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2025-03-13 21:44:24,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36176470588235293 [2025-03-13 21:44:24,758 INFO L175 Difference]: Start difference. First operand has 170 places, 165 transitions, 2646 flow. Second operand 10 states and 123 transitions. [2025-03-13 21:44:24,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 204 transitions, 3545 flow [2025-03-13 21:44:24,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 204 transitions, 3329 flow, removed 14 selfloop flow, removed 9 redundant places. [2025-03-13 21:44:24,805 INFO L231 Difference]: Finished difference. Result has 172 places, 172 transitions, 2739 flow [2025-03-13 21:44:24,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2739, PETRI_PLACES=172, PETRI_TRANSITIONS=172} [2025-03-13 21:44:24,806 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2025-03-13 21:44:24,806 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 172 transitions, 2739 flow [2025-03-13 21:44:24,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 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 21:44:24,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:24,806 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] [2025-03-13 21:44:24,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:25,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-13 21:44:25,007 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:25,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1953144202, now seen corresponding path program 2 times [2025-03-13 21:44:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846786231] [2025-03-13 21:44:25,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:25,013 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:25,023 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:25,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:25,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:25,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:25,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846786231] [2025-03-13 21:44:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846786231] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:25,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315466858] [2025-03-13 21:44:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:25,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:25,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:25,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:25,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:25,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:25,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 172 transitions, 2739 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:25,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:25,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:25,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:25,625 INFO L124 PetriNetUnfolderBase]: 857/1472 cut-off events. [2025-03-13 21:44:25,626 INFO L125 PetriNetUnfolderBase]: For 15229/15298 co-relation queries the response was YES. [2025-03-13 21:44:25,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 1472 events. 857/1472 cut-off events. For 15229/15298 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7374 event pairs, 262 based on Foata normal form. 16/1484 useless extension candidates. Maximal degree in co-relation 9404. Up to 786 conditions per place. [2025-03-13 21:44:25,634 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 137 selfloop transitions, 61 changer transitions 20/221 dead transitions. [2025-03-13 21:44:25,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 221 transitions, 3436 flow [2025-03-13 21:44:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:44:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:44:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2025-03-13 21:44:25,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3627450980392157 [2025-03-13 21:44:25,635 INFO L175 Difference]: Start difference. First operand has 172 places, 172 transitions, 2739 flow. Second operand 12 states and 148 transitions. [2025-03-13 21:44:25,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 221 transitions, 3436 flow [2025-03-13 21:44:25,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 221 transitions, 3317 flow, removed 15 selfloop flow, removed 6 redundant places. [2025-03-13 21:44:25,678 INFO L231 Difference]: Finished difference. Result has 177 places, 163 transitions, 2592 flow [2025-03-13 21:44:25,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2592, PETRI_PLACES=177, PETRI_TRANSITIONS=163} [2025-03-13 21:44:25,679 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2025-03-13 21:44:25,679 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 163 transitions, 2592 flow [2025-03-13 21:44:25,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:25,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:25,679 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] [2025-03-13 21:44:25,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-03-13 21:44:25,680 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:25,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1826121822, now seen corresponding path program 3 times [2025-03-13 21:44:25,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:25,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186636392] [2025-03-13 21:44:25,680 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:25,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:25,685 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:25,692 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:25,692 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:44:25,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:25,855 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 21:44:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186636392] [2025-03-13 21:44:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186636392] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529077859] [2025-03-13 21:44:25,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:25,858 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:25,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-13 21:44:25,906 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:25,923 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:25,923 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:44:25,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:25,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-13 21:44:25,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:25,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:25,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2025-03-13 21:44:25,996 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 21:44:25,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:26,063 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:44:26,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:44:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:26,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529077859] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:26,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 18 [2025-03-13 21:44:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37991429] [2025-03-13 21:44:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:26,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:26,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:26,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:26,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:26,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 163 transitions, 2592 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:26,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:26,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:26,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:26,393 INFO L124 PetriNetUnfolderBase]: 900/1548 cut-off events. [2025-03-13 21:44:26,394 INFO L125 PetriNetUnfolderBase]: For 17132/17201 co-relation queries the response was YES. [2025-03-13 21:44:26,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9994 conditions, 1548 events. 900/1548 cut-off events. For 17132/17201 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7841 event pairs, 264 based on Foata normal form. 10/1554 useless extension candidates. Maximal degree in co-relation 9934. Up to 803 conditions per place. [2025-03-13 21:44:26,403 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 160 selfloop transitions, 64 changer transitions 3/230 dead transitions. [2025-03-13 21:44:26,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 230 transitions, 3585 flow [2025-03-13 21:44:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2025-03-13 21:44:26,404 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4197860962566845 [2025-03-13 21:44:26,404 INFO L175 Difference]: Start difference. First operand has 177 places, 163 transitions, 2592 flow. Second operand 11 states and 157 transitions. [2025-03-13 21:44:26,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 230 transitions, 3585 flow [2025-03-13 21:44:26,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 230 transitions, 3420 flow, removed 24 selfloop flow, removed 12 redundant places. [2025-03-13 21:44:26,448 INFO L231 Difference]: Finished difference. Result has 168 places, 168 transitions, 2696 flow [2025-03-13 21:44:26,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2696, PETRI_PLACES=168, PETRI_TRANSITIONS=168} [2025-03-13 21:44:26,449 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2025-03-13 21:44:26,449 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 168 transitions, 2696 flow [2025-03-13 21:44:26,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:26,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:26,449 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:26,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-13 21:44:26,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-03-13 21:44:26,650 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:26,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:26,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1273769365, now seen corresponding path program 2 times [2025-03-13 21:44:26,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:26,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154372105] [2025-03-13 21:44:26,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:26,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:26,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:26,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:26,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:26,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:26,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:26,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154372105] [2025-03-13 21:44:26,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154372105] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:26,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:26,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355282568] [2025-03-13 21:44:26,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:26,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:26,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:26,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:26,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:26,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 168 transitions, 2696 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:26,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:26,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:26,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:27,078 INFO L124 PetriNetUnfolderBase]: 1008/1719 cut-off events. [2025-03-13 21:44:27,078 INFO L125 PetriNetUnfolderBase]: For 19042/19125 co-relation queries the response was YES. [2025-03-13 21:44:27,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11228 conditions, 1719 events. 1008/1719 cut-off events. For 19042/19125 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8885 event pairs, 335 based on Foata normal form. 20/1734 useless extension candidates. Maximal degree in co-relation 11171. Up to 1117 conditions per place. [2025-03-13 21:44:27,088 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 142 selfloop transitions, 73 changer transitions 0/218 dead transitions. [2025-03-13 21:44:27,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 218 transitions, 3591 flow [2025-03-13 21:44:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2025-03-13 21:44:27,091 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39869281045751637 [2025-03-13 21:44:27,091 INFO L175 Difference]: Start difference. First operand has 168 places, 168 transitions, 2696 flow. Second operand 9 states and 122 transitions. [2025-03-13 21:44:27,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 218 transitions, 3591 flow [2025-03-13 21:44:27,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 218 transitions, 3518 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-03-13 21:44:27,139 INFO L231 Difference]: Finished difference. Result has 175 places, 174 transitions, 2898 flow [2025-03-13 21:44:27,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2623, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2898, PETRI_PLACES=175, PETRI_TRANSITIONS=174} [2025-03-13 21:44:27,140 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2025-03-13 21:44:27,140 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 174 transitions, 2898 flow [2025-03-13 21:44:27,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:27,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:27,140 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] [2025-03-13 21:44:27,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2025-03-13 21:44:27,140 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:27,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash 461770529, now seen corresponding path program 3 times [2025-03-13 21:44:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993960810] [2025-03-13 21:44:27,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:27,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:27,144 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:27,147 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:27,147 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:27,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:27,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993960810] [2025-03-13 21:44:27,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993960810] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:27,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:27,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681108700] [2025-03-13 21:44:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:27,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:27,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:27,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:27,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:27,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 174 transitions, 2898 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:27,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:27,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:27,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:27,565 INFO L124 PetriNetUnfolderBase]: 992/1707 cut-off events. [2025-03-13 21:44:27,565 INFO L125 PetriNetUnfolderBase]: For 20693/20772 co-relation queries the response was YES. [2025-03-13 21:44:27,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11318 conditions, 1707 events. 992/1707 cut-off events. For 20693/20772 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8937 event pairs, 368 based on Foata normal form. 20/1723 useless extension candidates. Maximal degree in co-relation 11259. Up to 1206 conditions per place. [2025-03-13 21:44:27,576 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 130 selfloop transitions, 71 changer transitions 0/204 dead transitions. [2025-03-13 21:44:27,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 204 transitions, 3506 flow [2025-03-13 21:44:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2025-03-13 21:44:27,577 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2025-03-13 21:44:27,577 INFO L175 Difference]: Start difference. First operand has 175 places, 174 transitions, 2898 flow. Second operand 9 states and 114 transitions. [2025-03-13 21:44:27,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 204 transitions, 3506 flow [2025-03-13 21:44:27,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 204 transitions, 3424 flow, removed 17 selfloop flow, removed 4 redundant places. [2025-03-13 21:44:27,629 INFO L231 Difference]: Finished difference. Result has 181 places, 175 transitions, 2989 flow [2025-03-13 21:44:27,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2989, PETRI_PLACES=181, PETRI_TRANSITIONS=175} [2025-03-13 21:44:27,630 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2025-03-13 21:44:27,630 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 175 transitions, 2989 flow [2025-03-13 21:44:27,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:27,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:27,630 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] [2025-03-13 21:44:27,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-03-13 21:44:27,630 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:27,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1774337445, now seen corresponding path program 4 times [2025-03-13 21:44:27,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:27,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560445309] [2025-03-13 21:44:27,631 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:27,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:27,635 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:27,636 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-03-13 21:44:27,636 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:44:27,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:27,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:27,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560445309] [2025-03-13 21:44:27,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560445309] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:27,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:27,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:44:27,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477490515] [2025-03-13 21:44:27,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:27,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:27,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:27,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:27,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:27,718 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:27,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 175 transitions, 2989 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:27,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:27,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:27,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:28,006 INFO L124 PetriNetUnfolderBase]: 967/1666 cut-off events. [2025-03-13 21:44:28,006 INFO L125 PetriNetUnfolderBase]: For 18876/18957 co-relation queries the response was YES. [2025-03-13 21:44:28,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11095 conditions, 1666 events. 967/1666 cut-off events. For 18876/18957 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8667 event pairs, 374 based on Foata normal form. 10/1672 useless extension candidates. Maximal degree in co-relation 11034. Up to 1197 conditions per place. [2025-03-13 21:44:28,017 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 125 selfloop transitions, 64 changer transitions 5/197 dead transitions. [2025-03-13 21:44:28,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 197 transitions, 3472 flow [2025-03-13 21:44:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-13 21:44:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-13 21:44:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2025-03-13 21:44:28,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3860294117647059 [2025-03-13 21:44:28,018 INFO L175 Difference]: Start difference. First operand has 181 places, 175 transitions, 2989 flow. Second operand 8 states and 105 transitions. [2025-03-13 21:44:28,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 197 transitions, 3472 flow [2025-03-13 21:44:28,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 197 transitions, 3344 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:28,078 INFO L231 Difference]: Finished difference. Result has 183 places, 171 transitions, 2882 flow [2025-03-13 21:44:28,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2025-03-13 21:44:28,079 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2025-03-13 21:44:28,079 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 2882 flow [2025-03-13 21:44:28,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:28,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:28,079 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] [2025-03-13 21:44:28,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2025-03-13 21:44:28,079 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:28,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1478168994, now seen corresponding path program 4 times [2025-03-13 21:44:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:28,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775903082] [2025-03-13 21:44:28,080 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:28,083 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:28,084 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-03-13 21:44:28,084 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:44:28,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:28,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775903082] [2025-03-13 21:44:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775903082] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:28,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:28,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:44:28,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316758198] [2025-03-13 21:44:28,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:28,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:28,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:28,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:28,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:28,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:28,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 2882 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:28,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:28,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:28,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:28,421 INFO L124 PetriNetUnfolderBase]: 957/1650 cut-off events. [2025-03-13 21:44:28,421 INFO L125 PetriNetUnfolderBase]: For 18316/18397 co-relation queries the response was YES. [2025-03-13 21:44:28,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10890 conditions, 1650 events. 957/1650 cut-off events. For 18316/18397 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8560 event pairs, 368 based on Foata normal form. 11/1656 useless extension candidates. Maximal degree in co-relation 10829. Up to 1166 conditions per place. [2025-03-13 21:44:28,431 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 123 selfloop transitions, 62 changer transitions 9/197 dead transitions. [2025-03-13 21:44:28,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 197 transitions, 3376 flow [2025-03-13 21:44:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2025-03-13 21:44:28,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3790849673202614 [2025-03-13 21:44:28,432 INFO L175 Difference]: Start difference. First operand has 183 places, 171 transitions, 2882 flow. Second operand 9 states and 116 transitions. [2025-03-13 21:44:28,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 197 transitions, 3376 flow [2025-03-13 21:44:28,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 197 transitions, 3199 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:28,479 INFO L231 Difference]: Finished difference. Result has 181 places, 164 transitions, 2708 flow [2025-03-13 21:44:28,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2708, PETRI_PLACES=181, PETRI_TRANSITIONS=164} [2025-03-13 21:44:28,479 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2025-03-13 21:44:28,479 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 164 transitions, 2708 flow [2025-03-13 21:44:28,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:28,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:28,479 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] [2025-03-13 21:44:28,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2025-03-13 21:44:28,479 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:28,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash -437933196, now seen corresponding path program 5 times [2025-03-13 21:44:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:28,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833065983] [2025-03-13 21:44:28,480 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:28,487 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:28,491 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:28,492 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:28,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833065983] [2025-03-13 21:44:28,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833065983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486938605] [2025-03-13 21:44:28,684 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:28,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:28,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:28,686 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:28,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-13 21:44:28,742 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:28,759 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:28,759 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:28,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:28,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-13 21:44:28,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:28,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:28,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2025-03-13 21:44:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:28,864 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:44:28,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486938605] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:28,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:44:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2025-03-13 21:44:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965454030] [2025-03-13 21:44:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:28,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:28,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:28,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:44:28,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:28,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 164 transitions, 2708 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:28,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:28,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:28,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:29,122 INFO L124 PetriNetUnfolderBase]: 892/1531 cut-off events. [2025-03-13 21:44:29,122 INFO L125 PetriNetUnfolderBase]: For 16462/16533 co-relation queries the response was YES. [2025-03-13 21:44:29,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10113 conditions, 1531 events. 892/1531 cut-off events. For 16462/16533 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7737 event pairs, 349 based on Foata normal form. 11/1537 useless extension candidates. Maximal degree in co-relation 10052. Up to 1087 conditions per place. [2025-03-13 21:44:29,132 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 117 selfloop transitions, 60 changer transitions 6/186 dead transitions. [2025-03-13 21:44:29,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 186 transitions, 3143 flow [2025-03-13 21:44:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2025-03-13 21:44:29,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3352941176470588 [2025-03-13 21:44:29,133 INFO L175 Difference]: Start difference. First operand has 181 places, 164 transitions, 2708 flow. Second operand 10 states and 114 transitions. [2025-03-13 21:44:29,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 186 transitions, 3143 flow [2025-03-13 21:44:29,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 186 transitions, 3026 flow, removed 10 selfloop flow, removed 9 redundant places. [2025-03-13 21:44:29,179 INFO L231 Difference]: Finished difference. Result has 177 places, 159 transitions, 2606 flow [2025-03-13 21:44:29,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2606, PETRI_PLACES=177, PETRI_TRANSITIONS=159} [2025-03-13 21:44:29,179 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2025-03-13 21:44:29,179 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 159 transitions, 2606 flow [2025-03-13 21:44:29,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:29,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:29,179 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] [2025-03-13 21:44:29,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-13 21:44:29,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:29,380 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:29,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1136872086, now seen corresponding path program 6 times [2025-03-13 21:44:29,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:29,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957507507] [2025-03-13 21:44:29,380 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:29,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:29,385 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:29,389 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:29,389 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:29,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957507507] [2025-03-13 21:44:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957507507] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:29,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:29,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:29,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669383880] [2025-03-13 21:44:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:29,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:29,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:29,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:29,602 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:29,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 159 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:29,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:29,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:29,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:29,870 INFO L124 PetriNetUnfolderBase]: 913/1559 cut-off events. [2025-03-13 21:44:29,871 INFO L125 PetriNetUnfolderBase]: For 17281/17352 co-relation queries the response was YES. [2025-03-13 21:44:29,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10367 conditions, 1559 events. 913/1559 cut-off events. For 17281/17352 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7876 event pairs, 355 based on Foata normal form. 10/1565 useless extension candidates. Maximal degree in co-relation 10309. Up to 1099 conditions per place. [2025-03-13 21:44:29,880 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 122 selfloop transitions, 60 changer transitions 0/185 dead transitions. [2025-03-13 21:44:29,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 185 transitions, 3271 flow [2025-03-13 21:44:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2025-03-13 21:44:29,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3660130718954248 [2025-03-13 21:44:29,881 INFO L175 Difference]: Start difference. First operand has 177 places, 159 transitions, 2606 flow. Second operand 9 states and 112 transitions. [2025-03-13 21:44:29,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 185 transitions, 3271 flow [2025-03-13 21:44:29,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 185 transitions, 3057 flow, removed 2 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:29,922 INFO L231 Difference]: Finished difference. Result has 172 places, 166 transitions, 2708 flow [2025-03-13 21:44:29,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2708, PETRI_PLACES=172, PETRI_TRANSITIONS=166} [2025-03-13 21:44:29,923 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2025-03-13 21:44:29,923 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 166 transitions, 2708 flow [2025-03-13 21:44:29,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:29,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:29,923 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] [2025-03-13 21:44:29,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2025-03-13 21:44:29,923 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:29,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 519328688, now seen corresponding path program 7 times [2025-03-13 21:44:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863899819] [2025-03-13 21:44:29,924 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:29,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:29,931 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:29,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:29,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:30,075 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 21:44:30,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863899819] [2025-03-13 21:44:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863899819] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755532773] [2025-03-13 21:44:30,076 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:30,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:30,077 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:30,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-13 21:44:30,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:30,143 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:30,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:30,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:30,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:44:30,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:30,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:30,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2025-03-13 21:44:30,184 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 21:44:30,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:30,237 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:30,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:30,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755532773] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:30,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:30,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 18 [2025-03-13 21:44:30,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911163717] [2025-03-13 21:44:30,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:30,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:30,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:30,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:30,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:30,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:30,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 166 transitions, 2708 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:30,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:30,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:30,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:30,550 INFO L124 PetriNetUnfolderBase]: 958/1653 cut-off events. [2025-03-13 21:44:30,550 INFO L125 PetriNetUnfolderBase]: For 16813/16890 co-relation queries the response was YES. [2025-03-13 21:44:30,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10601 conditions, 1653 events. 958/1653 cut-off events. For 16813/16890 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8594 event pairs, 346 based on Foata normal form. 10/1659 useless extension candidates. Maximal degree in co-relation 10542. Up to 1075 conditions per place. [2025-03-13 21:44:30,560 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 144 selfloop transitions, 63 changer transitions 0/210 dead transitions. [2025-03-13 21:44:30,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 210 transitions, 3483 flow [2025-03-13 21:44:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2025-03-13 21:44:30,560 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2025-03-13 21:44:30,560 INFO L175 Difference]: Start difference. First operand has 172 places, 166 transitions, 2708 flow. Second operand 10 states and 139 transitions. [2025-03-13 21:44:30,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 210 transitions, 3483 flow [2025-03-13 21:44:30,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 210 transitions, 3375 flow, removed 14 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:30,602 INFO L231 Difference]: Finished difference. Result has 179 places, 172 transitions, 2867 flow [2025-03-13 21:44:30,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2867, PETRI_PLACES=179, PETRI_TRANSITIONS=172} [2025-03-13 21:44:30,602 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2025-03-13 21:44:30,603 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 172 transitions, 2867 flow [2025-03-13 21:44:30,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:30,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:30,603 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] [2025-03-13 21:44:30,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-13 21:44:30,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:30,803 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:30,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash 877041391, now seen corresponding path program 5 times [2025-03-13 21:44:30,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:30,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529531112] [2025-03-13 21:44:30,804 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:30,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:30,808 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:30,813 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:30,815 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:30,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:30,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:30,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529531112] [2025-03-13 21:44:30,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529531112] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:30,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870163775] [2025-03-13 21:44:30,948 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:30,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:30,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:30,950 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:30,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-13 21:44:30,999 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:31,014 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:31,014 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:31,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:31,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:44:31,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:31,076 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:44:31,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-03-13 21:44:31,083 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 21:44:31,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:31,136 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:31,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:31,150 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 21:44:31,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870163775] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:31,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:31,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-13 21:44:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820621539] [2025-03-13 21:44:31,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:31,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:44:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:31,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:44:31,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:31,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:31,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 172 transitions, 2867 flow. Second operand has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 18 states have internal predecessors, (137), 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 21:44:31,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:31,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:31,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:31,532 INFO L124 PetriNetUnfolderBase]: 1066/1829 cut-off events. [2025-03-13 21:44:31,532 INFO L125 PetriNetUnfolderBase]: For 20328/20409 co-relation queries the response was YES. [2025-03-13 21:44:31,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11993 conditions, 1829 events. 1066/1829 cut-off events. For 20328/20409 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9696 event pairs, 369 based on Foata normal form. 16/1840 useless extension candidates. Maximal degree in co-relation 11931. Up to 1218 conditions per place. [2025-03-13 21:44:31,546 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 139 selfloop transitions, 71 changer transitions 0/213 dead transitions. [2025-03-13 21:44:31,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 213 transitions, 3702 flow [2025-03-13 21:44:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2025-03-13 21:44:31,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2025-03-13 21:44:31,547 INFO L175 Difference]: Start difference. First operand has 179 places, 172 transitions, 2867 flow. Second operand 11 states and 132 transitions. [2025-03-13 21:44:31,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 213 transitions, 3702 flow [2025-03-13 21:44:31,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 213 transitions, 3646 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-13 21:44:31,602 INFO L231 Difference]: Finished difference. Result has 189 places, 178 transitions, 3091 flow [2025-03-13 21:44:31,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3091, PETRI_PLACES=189, PETRI_TRANSITIONS=178} [2025-03-13 21:44:31,602 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2025-03-13 21:44:31,602 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 178 transitions, 3091 flow [2025-03-13 21:44:31,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 18 states have internal predecessors, (137), 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 21:44:31,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:31,603 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] [2025-03-13 21:44:31,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-13 21:44:31,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:31,803 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:31,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash -811163179, now seen corresponding path program 6 times [2025-03-13 21:44:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:31,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286620331] [2025-03-13 21:44:31,804 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:31,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:31,809 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:31,812 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:31,812 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:31,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:31,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:31,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286620331] [2025-03-13 21:44:31,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286620331] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:31,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:31,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996544179] [2025-03-13 21:44:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:31,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:31,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:31,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:31,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:31,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 178 transitions, 3091 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:31,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:31,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:31,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:32,282 INFO L124 PetriNetUnfolderBase]: 1089/1879 cut-off events. [2025-03-13 21:44:32,282 INFO L125 PetriNetUnfolderBase]: For 24058/24125 co-relation queries the response was YES. [2025-03-13 21:44:32,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12623 conditions, 1879 events. 1089/1879 cut-off events. For 24058/24125 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10062 event pairs, 424 based on Foata normal form. 16/1891 useless extension candidates. Maximal degree in co-relation 12559. Up to 1364 conditions per place. [2025-03-13 21:44:32,294 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 132 selfloop transitions, 66 changer transitions 0/201 dead transitions. [2025-03-13 21:44:32,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 201 transitions, 3671 flow [2025-03-13 21:44:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2025-03-13 21:44:32,295 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2025-03-13 21:44:32,295 INFO L175 Difference]: Start difference. First operand has 189 places, 178 transitions, 3091 flow. Second operand 9 states and 114 transitions. [2025-03-13 21:44:32,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 201 transitions, 3671 flow [2025-03-13 21:44:32,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 201 transitions, 3547 flow, removed 21 selfloop flow, removed 6 redundant places. [2025-03-13 21:44:32,349 INFO L231 Difference]: Finished difference. Result has 193 places, 181 transitions, 3184 flow [2025-03-13 21:44:32,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3184, PETRI_PLACES=193, PETRI_TRANSITIONS=181} [2025-03-13 21:44:32,350 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2025-03-13 21:44:32,350 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 181 transitions, 3184 flow [2025-03-13 21:44:32,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:32,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:32,350 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] [2025-03-13 21:44:32,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2025-03-13 21:44:32,350 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:32,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash 501403737, now seen corresponding path program 7 times [2025-03-13 21:44:32,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:32,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367042598] [2025-03-13 21:44:32,351 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:32,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:32,355 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:32,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:32,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:32,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367042598] [2025-03-13 21:44:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367042598] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:32,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:32,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995753779] [2025-03-13 21:44:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:32,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:32,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:32,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:32,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:32,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 181 transitions, 3184 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:32,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:32,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:32,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:32,785 INFO L124 PetriNetUnfolderBase]: 1090/1877 cut-off events. [2025-03-13 21:44:32,785 INFO L125 PetriNetUnfolderBase]: For 22721/22802 co-relation queries the response was YES. [2025-03-13 21:44:32,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12683 conditions, 1877 events. 1090/1877 cut-off events. For 22721/22802 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10089 event pairs, 427 based on Foata normal form. 6/1879 useless extension candidates. Maximal degree in co-relation 12617. Up to 1389 conditions per place. [2025-03-13 21:44:32,799 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 126 selfloop transitions, 63 changer transitions 5/197 dead transitions. [2025-03-13 21:44:32,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 197 transitions, 3675 flow [2025-03-13 21:44:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2025-03-13 21:44:32,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3411764705882353 [2025-03-13 21:44:32,800 INFO L175 Difference]: Start difference. First operand has 193 places, 181 transitions, 3184 flow. Second operand 10 states and 116 transitions. [2025-03-13 21:44:32,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 197 transitions, 3675 flow [2025-03-13 21:44:32,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 197 transitions, 3535 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:32,864 INFO L231 Difference]: Finished difference. Result has 195 places, 180 transitions, 3140 flow [2025-03-13 21:44:32,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3140, PETRI_PLACES=195, PETRI_TRANSITIONS=180} [2025-03-13 21:44:32,865 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2025-03-13 21:44:32,865 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 180 transitions, 3140 flow [2025-03-13 21:44:32,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:32,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:32,865 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] [2025-03-13 21:44:32,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2025-03-13 21:44:32,865 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:32,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:32,866 INFO L85 PathProgramCache]: Analyzing trace with hash 592440303, now seen corresponding path program 8 times [2025-03-13 21:44:32,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:32,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30277222] [2025-03-13 21:44:32,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:32,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:32,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:32,876 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:32,876 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:32,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:33,028 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 21:44:33,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30277222] [2025-03-13 21:44:33,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30277222] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197215589] [2025-03-13 21:44:33,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:33,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:33,031 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:33,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-13 21:44:33,083 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:33,101 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:33,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:33,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:33,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-13 21:44:33,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:33,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:33,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2025-03-13 21:44:33,166 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 21:44:33,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:33,219 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:33,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197215589] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:33,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:33,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2025-03-13 21:44:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549833138] [2025-03-13 21:44:33,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:33,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:33,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:33,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:44:33,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:33,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 180 transitions, 3140 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:33,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:33,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:33,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:33,542 INFO L124 PetriNetUnfolderBase]: 1101/1931 cut-off events. [2025-03-13 21:44:33,542 INFO L125 PetriNetUnfolderBase]: For 22495/22564 co-relation queries the response was YES. [2025-03-13 21:44:33,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12498 conditions, 1931 events. 1101/1931 cut-off events. For 22495/22564 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10562 event pairs, 414 based on Foata normal form. 16/1943 useless extension candidates. Maximal degree in co-relation 12433. Up to 1310 conditions per place. [2025-03-13 21:44:33,556 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 145 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2025-03-13 21:44:33,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 212 transitions, 3746 flow [2025-03-13 21:44:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2025-03-13 21:44:33,556 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40522875816993464 [2025-03-13 21:44:33,557 INFO L175 Difference]: Start difference. First operand has 195 places, 180 transitions, 3140 flow. Second operand 9 states and 124 transitions. [2025-03-13 21:44:33,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 212 transitions, 3746 flow [2025-03-13 21:44:33,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 212 transitions, 3614 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:33,633 INFO L231 Difference]: Finished difference. Result has 196 places, 181 transitions, 3167 flow [2025-03-13 21:44:33,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3167, PETRI_PLACES=196, PETRI_TRANSITIONS=181} [2025-03-13 21:44:33,633 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2025-03-13 21:44:33,633 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 181 transitions, 3167 flow [2025-03-13 21:44:33,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:33,633 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:33,633 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] [2025-03-13 21:44:33,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:33,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2025-03-13 21:44:33,839 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:33,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1260800609, now seen corresponding path program 9 times [2025-03-13 21:44:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:33,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187988868] [2025-03-13 21:44:33,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:33,844 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:33,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:33,847 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:33,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:33,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:33,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187988868] [2025-03-13 21:44:33,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187988868] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:33,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:33,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:33,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038338802] [2025-03-13 21:44:33,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:33,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:33,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:33,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:33,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:33,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:33,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 181 transitions, 3167 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:33,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:33,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:33,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:34,302 INFO L124 PetriNetUnfolderBase]: 1102/1936 cut-off events. [2025-03-13 21:44:34,302 INFO L125 PetriNetUnfolderBase]: For 21759/21830 co-relation queries the response was YES. [2025-03-13 21:44:34,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12574 conditions, 1936 events. 1102/1936 cut-off events. For 21759/21830 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10668 event pairs, 459 based on Foata normal form. 6/1938 useless extension candidates. Maximal degree in co-relation 12507. Up to 1439 conditions per place. [2025-03-13 21:44:34,318 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 126 selfloop transitions, 63 changer transitions 5/197 dead transitions. [2025-03-13 21:44:34,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 197 transitions, 3658 flow [2025-03-13 21:44:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2025-03-13 21:44:34,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3382352941176471 [2025-03-13 21:44:34,318 INFO L175 Difference]: Start difference. First operand has 196 places, 181 transitions, 3167 flow. Second operand 10 states and 115 transitions. [2025-03-13 21:44:34,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 197 transitions, 3658 flow [2025-03-13 21:44:34,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 197 transitions, 3548 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-03-13 21:44:34,380 INFO L231 Difference]: Finished difference. Result has 201 places, 180 transitions, 3159 flow [2025-03-13 21:44:34,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3159, PETRI_PLACES=201, PETRI_TRANSITIONS=180} [2025-03-13 21:44:34,380 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2025-03-13 21:44:34,380 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 180 transitions, 3159 flow [2025-03-13 21:44:34,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:34,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:34,381 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] [2025-03-13 21:44:34,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2025-03-13 21:44:34,381 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:34,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 262638737, now seen corresponding path program 10 times [2025-03-13 21:44:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:34,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087168005] [2025-03-13 21:44:34,381 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:34,386 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:34,388 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-03-13 21:44:34,388 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:44:34,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:34,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:34,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087168005] [2025-03-13 21:44:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087168005] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:34,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:34,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:44:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043780895] [2025-03-13 21:44:34,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:34,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:34,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:34,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:34,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:34,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 180 transitions, 3159 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:34,673 INFO L124 PetriNetUnfolderBase]: 1040/1805 cut-off events. [2025-03-13 21:44:34,673 INFO L125 PetriNetUnfolderBase]: For 20614/20693 co-relation queries the response was YES. [2025-03-13 21:44:34,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11886 conditions, 1805 events. 1040/1805 cut-off events. For 20614/20693 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9676 event pairs, 418 based on Foata normal form. 6/1807 useless extension candidates. Maximal degree in co-relation 11819. Up to 1335 conditions per place. [2025-03-13 21:44:34,687 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 126 selfloop transitions, 54 changer transitions 11/194 dead transitions. [2025-03-13 21:44:34,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 194 transitions, 3545 flow [2025-03-13 21:44:34,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2025-03-13 21:44:34,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35947712418300654 [2025-03-13 21:44:34,688 INFO L175 Difference]: Start difference. First operand has 201 places, 180 transitions, 3159 flow. Second operand 9 states and 110 transitions. [2025-03-13 21:44:34,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 194 transitions, 3545 flow [2025-03-13 21:44:34,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 194 transitions, 3421 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:34,741 INFO L231 Difference]: Finished difference. Result has 200 places, 172 transitions, 2963 flow [2025-03-13 21:44:34,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2963, PETRI_PLACES=200, PETRI_TRANSITIONS=172} [2025-03-13 21:44:34,742 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2025-03-13 21:44:34,742 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 172 transitions, 2963 flow [2025-03-13 21:44:34,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:34,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:34,742 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:34,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2025-03-13 21:44:34,742 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:34,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1218271142, now seen corresponding path program 8 times [2025-03-13 21:44:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851504849] [2025-03-13 21:44:34,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:34,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:34,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:34,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:34,751 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:34,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:34,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:34,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851504849] [2025-03-13 21:44:34,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851504849] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:34,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:34,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435746990] [2025-03-13 21:44:34,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:34,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:34,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:34,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:34,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:34,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 172 transitions, 2963 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:34,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:34,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:35,144 INFO L124 PetriNetUnfolderBase]: 1006/1747 cut-off events. [2025-03-13 21:44:35,144 INFO L125 PetriNetUnfolderBase]: For 19330/19409 co-relation queries the response was YES. [2025-03-13 21:44:35,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11376 conditions, 1747 events. 1006/1747 cut-off events. For 19330/19409 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9298 event pairs, 412 based on Foata normal form. 7/1750 useless extension candidates. Maximal degree in co-relation 11309. Up to 1306 conditions per place. [2025-03-13 21:44:35,157 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 122 selfloop transitions, 54 changer transitions 6/185 dead transitions. [2025-03-13 21:44:35,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 185 transitions, 3330 flow [2025-03-13 21:44:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2025-03-13 21:44:35,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3323529411764706 [2025-03-13 21:44:35,158 INFO L175 Difference]: Start difference. First operand has 200 places, 172 transitions, 2963 flow. Second operand 10 states and 113 transitions. [2025-03-13 21:44:35,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 185 transitions, 3330 flow [2025-03-13 21:44:35,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 185 transitions, 3078 flow, removed 5 selfloop flow, removed 12 redundant places. [2025-03-13 21:44:35,208 INFO L231 Difference]: Finished difference. Result has 190 places, 167 transitions, 2699 flow [2025-03-13 21:44:35,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2699, PETRI_PLACES=190, PETRI_TRANSITIONS=167} [2025-03-13 21:44:35,208 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2025-03-13 21:44:35,208 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 167 transitions, 2699 flow [2025-03-13 21:44:35,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:35,209 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:35,209 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] [2025-03-13 21:44:35,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2025-03-13 21:44:35,209 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:35,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:35,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1710866904, now seen corresponding path program 9 times [2025-03-13 21:44:35,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:35,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396310212] [2025-03-13 21:44:35,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:35,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:35,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:35,217 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:35,217 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:35,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:35,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396310212] [2025-03-13 21:44:35,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396310212] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:35,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:35,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:35,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47642471] [2025-03-13 21:44:35,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:35,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:35,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:35,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:35,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:35,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:35,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 167 transitions, 2699 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:35,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:35,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:35,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:35,592 INFO L124 PetriNetUnfolderBase]: 996/1730 cut-off events. [2025-03-13 21:44:35,592 INFO L125 PetriNetUnfolderBase]: For 16016/16095 co-relation queries the response was YES. [2025-03-13 21:44:35,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11053 conditions, 1730 events. 996/1730 cut-off events. For 16016/16095 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9164 event pairs, 410 based on Foata normal form. 7/1733 useless extension candidates. Maximal degree in co-relation 10989. Up to 1294 conditions per place. [2025-03-13 21:44:35,605 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 121 selfloop transitions, 51 changer transitions 6/181 dead transitions. [2025-03-13 21:44:35,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 181 transitions, 3088 flow [2025-03-13 21:44:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2025-03-13 21:44:35,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32941176470588235 [2025-03-13 21:44:35,606 INFO L175 Difference]: Start difference. First operand has 190 places, 167 transitions, 2699 flow. Second operand 10 states and 112 transitions. [2025-03-13 21:44:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 181 transitions, 3088 flow [2025-03-13 21:44:35,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 181 transitions, 2974 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-13 21:44:35,652 INFO L231 Difference]: Finished difference. Result has 189 places, 163 transitions, 2603 flow [2025-03-13 21:44:35,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2603, PETRI_PLACES=189, PETRI_TRANSITIONS=163} [2025-03-13 21:44:35,653 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2025-03-13 21:44:35,653 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 163 transitions, 2603 flow [2025-03-13 21:44:35,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:35,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:35,653 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] [2025-03-13 21:44:35,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2025-03-13 21:44:35,653 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:35,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1543864594, now seen corresponding path program 10 times [2025-03-13 21:44:35,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:35,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672866524] [2025-03-13 21:44:35,654 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:35,658 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:35,659 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-03-13 21:44:35,659 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:44:35,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:35,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:35,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672866524] [2025-03-13 21:44:35,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672866524] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:35,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:35,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:44:35,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4897962] [2025-03-13 21:44:35,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:35,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:35,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:35,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:35,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:35,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:35,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 163 transitions, 2603 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:35,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:35,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:35,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:35,950 INFO L124 PetriNetUnfolderBase]: 939/1626 cut-off events. [2025-03-13 21:44:35,950 INFO L125 PetriNetUnfolderBase]: For 14795/14864 co-relation queries the response was YES. [2025-03-13 21:44:35,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10405 conditions, 1626 events. 939/1626 cut-off events. For 14795/14864 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8451 event pairs, 387 based on Foata normal form. 7/1629 useless extension candidates. Maximal degree in co-relation 10341. Up to 1210 conditions per place. [2025-03-13 21:44:35,960 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 120 selfloop transitions, 43 changer transitions 13/179 dead transitions. [2025-03-13 21:44:35,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 179 transitions, 2967 flow [2025-03-13 21:44:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2025-03-13 21:44:35,960 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3562091503267974 [2025-03-13 21:44:35,960 INFO L175 Difference]: Start difference. First operand has 189 places, 163 transitions, 2603 flow. Second operand 9 states and 109 transitions. [2025-03-13 21:44:35,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 179 transitions, 2967 flow [2025-03-13 21:44:35,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 179 transitions, 2847 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-03-13 21:44:36,000 INFO L231 Difference]: Finished difference. Result has 183 places, 155 transitions, 2419 flow [2025-03-13 21:44:36,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2414, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2419, PETRI_PLACES=183, PETRI_TRANSITIONS=155} [2025-03-13 21:44:36,001 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2025-03-13 21:44:36,001 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 155 transitions, 2419 flow [2025-03-13 21:44:36,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:36,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:36,001 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] [2025-03-13 21:44:36,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2025-03-13 21:44:36,001 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:36,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1145606378, now seen corresponding path program 11 times [2025-03-13 21:44:36,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:36,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387080610] [2025-03-13 21:44:36,002 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:36,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:36,005 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:36,010 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:36,010 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:36,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:36,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387080610] [2025-03-13 21:44:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387080610] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788338255] [2025-03-13 21:44:36,139 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:36,141 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:36,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-13 21:44:36,199 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:36,216 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:36,217 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:36,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:36,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:44:36,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:36,286 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:44:36,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-03-13 21:44:36,295 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 21:44:36,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:36,355 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:44:36,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:44:36,365 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 21:44:36,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788338255] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:36,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:36,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-13 21:44:36,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467902946] [2025-03-13 21:44:36,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:36,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-13 21:44:36,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:36,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-13 21:44:36,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:44:36,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:36,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 155 transitions, 2419 flow. Second operand has 17 states, 17 states have (on average 7.764705882352941) internal successors, (132), 17 states have internal predecessors, (132), 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 21:44:36,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:36,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:36,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:36,761 INFO L124 PetriNetUnfolderBase]: 962/1681 cut-off events. [2025-03-13 21:44:36,761 INFO L125 PetriNetUnfolderBase]: For 15058/15088 co-relation queries the response was YES. [2025-03-13 21:44:36,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10662 conditions, 1681 events. 962/1681 cut-off events. For 15058/15088 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8895 event pairs, 126 based on Foata normal form. 10/1691 useless extension candidates. Maximal degree in co-relation 10599. Up to 698 conditions per place. [2025-03-13 21:44:36,772 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 148 selfloop transitions, 66 changer transitions 2/219 dead transitions. [2025-03-13 21:44:36,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 219 transitions, 3480 flow [2025-03-13 21:44:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2025-03-13 21:44:36,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2025-03-13 21:44:36,772 INFO L175 Difference]: Start difference. First operand has 183 places, 155 transitions, 2419 flow. Second operand 11 states and 132 transitions. [2025-03-13 21:44:36,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 219 transitions, 3480 flow [2025-03-13 21:44:36,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 219 transitions, 3343 flow, removed 7 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:36,813 INFO L231 Difference]: Finished difference. Result has 177 places, 159 transitions, 2520 flow [2025-03-13 21:44:36,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2520, PETRI_PLACES=177, PETRI_TRANSITIONS=159} [2025-03-13 21:44:36,813 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2025-03-13 21:44:36,813 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 159 transitions, 2520 flow [2025-03-13 21:44:36,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.764705882352941) internal successors, (132), 17 states have internal predecessors, (132), 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 21:44:36,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:36,814 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] [2025-03-13 21:44:36,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-13 21:44:37,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-03-13 21:44:37,014 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:37,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2135788781, now seen corresponding path program 11 times [2025-03-13 21:44:37,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:37,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519771869] [2025-03-13 21:44:37,015 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:37,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:37,019 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:37,023 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:37,023 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:37,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519771869] [2025-03-13 21:44:37,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519771869] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145105150] [2025-03-13 21:44:37,153 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:37,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:37,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:37,155 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:37,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-13 21:44:37,214 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:37,232 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:37,232 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:37,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:37,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:44:37,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:37,307 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:44:37,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-03-13 21:44:37,316 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 21:44:37,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:37,377 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:37,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:37,397 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 21:44:37,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145105150] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:37,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:37,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-13 21:44:37,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556399572] [2025-03-13 21:44:37,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:37,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:44:37,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:37,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:44:37,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:37,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:37,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 159 transitions, 2520 flow. Second operand has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 18 states have internal predecessors, (137), 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 21:44:37,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:37,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:37,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:37,855 INFO L124 PetriNetUnfolderBase]: 985/1707 cut-off events. [2025-03-13 21:44:37,856 INFO L125 PetriNetUnfolderBase]: For 16397/16465 co-relation queries the response was YES. [2025-03-13 21:44:37,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11034 conditions, 1707 events. 985/1707 cut-off events. For 16397/16465 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8908 event pairs, 344 based on Foata normal form. 16/1723 useless extension candidates. Maximal degree in co-relation 10974. Up to 1105 conditions per place. [2025-03-13 21:44:37,865 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 127 selfloop transitions, 67 changer transitions 0/197 dead transitions. [2025-03-13 21:44:37,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 197 transitions, 3268 flow [2025-03-13 21:44:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2025-03-13 21:44:37,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34759358288770054 [2025-03-13 21:44:37,866 INFO L175 Difference]: Start difference. First operand has 177 places, 159 transitions, 2520 flow. Second operand 11 states and 130 transitions. [2025-03-13 21:44:37,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 197 transitions, 3268 flow [2025-03-13 21:44:37,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 197 transitions, 3075 flow, removed 18 selfloop flow, removed 10 redundant places. [2025-03-13 21:44:37,904 INFO L231 Difference]: Finished difference. Result has 179 places, 164 transitions, 2590 flow [2025-03-13 21:44:37,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2590, PETRI_PLACES=179, PETRI_TRANSITIONS=164} [2025-03-13 21:44:37,904 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2025-03-13 21:44:37,904 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 164 transitions, 2590 flow [2025-03-13 21:44:37,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 18 states have internal predecessors, (137), 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 21:44:37,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:37,904 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] [2025-03-13 21:44:37,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:38,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:38,105 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:38,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -157237408, now seen corresponding path program 12 times [2025-03-13 21:44:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:38,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607020845] [2025-03-13 21:44:38,106 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:38,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:38,111 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:38,114 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:38,114 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:38,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:38,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607020845] [2025-03-13 21:44:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607020845] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:38,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:38,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019646467] [2025-03-13 21:44:38,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:38,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:38,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:38,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:38,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:38,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 164 transitions, 2590 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:38,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:38,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:38,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:38,539 INFO L124 PetriNetUnfolderBase]: 1063/1825 cut-off events. [2025-03-13 21:44:38,539 INFO L125 PetriNetUnfolderBase]: For 17993/18069 co-relation queries the response was YES. [2025-03-13 21:44:38,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12040 conditions, 1825 events. 1063/1825 cut-off events. For 17993/18069 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9693 event pairs, 301 based on Foata normal form. 10/1835 useless extension candidates. Maximal degree in co-relation 11980. Up to 1129 conditions per place. [2025-03-13 21:44:38,550 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 143 selfloop transitions, 72 changer transitions 0/218 dead transitions. [2025-03-13 21:44:38,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 218 transitions, 3672 flow [2025-03-13 21:44:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2025-03-13 21:44:38,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38562091503267976 [2025-03-13 21:44:38,551 INFO L175 Difference]: Start difference. First operand has 179 places, 164 transitions, 2590 flow. Second operand 9 states and 118 transitions. [2025-03-13 21:44:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 218 transitions, 3672 flow [2025-03-13 21:44:38,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 218 transitions, 3540 flow, removed 17 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:38,596 INFO L231 Difference]: Finished difference. Result has 182 places, 171 transitions, 2792 flow [2025-03-13 21:44:38,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2792, PETRI_PLACES=182, PETRI_TRANSITIONS=171} [2025-03-13 21:44:38,596 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2025-03-13 21:44:38,596 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 171 transitions, 2792 flow [2025-03-13 21:44:38,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:38,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:38,597 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] [2025-03-13 21:44:38,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2025-03-13 21:44:38,597 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:38,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1554135964, now seen corresponding path program 13 times [2025-03-13 21:44:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:38,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504318321] [2025-03-13 21:44:38,597 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:38,603 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:38,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:38,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:38,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:38,728 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 21:44:38,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504318321] [2025-03-13 21:44:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504318321] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695175520] [2025-03-13 21:44:38,728 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:38,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:38,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:38,730 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:38,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-13 21:44:38,781 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:38,796 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:38,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:38,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:38,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:44:38,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:38,834 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-13 21:44:38,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2025-03-13 21:44:38,841 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 21:44:38,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:38,899 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:38,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:38,915 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 21:44:38,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695175520] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:38,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:38,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2025-03-13 21:44:38,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423120339] [2025-03-13 21:44:38,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:38,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:44:38,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:38,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:44:38,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:38,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:38,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 171 transitions, 2792 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 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 21:44:38,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:38,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:38,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:39,320 INFO L124 PetriNetUnfolderBase]: 1080/1854 cut-off events. [2025-03-13 21:44:39,320 INFO L125 PetriNetUnfolderBase]: For 20259/20333 co-relation queries the response was YES. [2025-03-13 21:44:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12414 conditions, 1854 events. 1080/1854 cut-off events. For 20259/20333 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9800 event pairs, 355 based on Foata normal form. 10/1864 useless extension candidates. Maximal degree in co-relation 12352. Up to 1156 conditions per place. [2025-03-13 21:44:39,337 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 140 selfloop transitions, 71 changer transitions 1/215 dead transitions. [2025-03-13 21:44:39,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 215 transitions, 3775 flow [2025-03-13 21:44:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2025-03-13 21:44:39,338 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36470588235294116 [2025-03-13 21:44:39,338 INFO L175 Difference]: Start difference. First operand has 182 places, 171 transitions, 2792 flow. Second operand 10 states and 124 transitions. [2025-03-13 21:44:39,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 215 transitions, 3775 flow [2025-03-13 21:44:39,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 215 transitions, 3650 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:39,394 INFO L231 Difference]: Finished difference. Result has 189 places, 178 transitions, 3017 flow [2025-03-13 21:44:39,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3017, PETRI_PLACES=189, PETRI_TRANSITIONS=178} [2025-03-13 21:44:39,394 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2025-03-13 21:44:39,394 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 178 transitions, 3017 flow [2025-03-13 21:44:39,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 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 21:44:39,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:39,394 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] [2025-03-13 21:44:39,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-13 21:44:39,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:39,595 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:39,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1794809864, now seen corresponding path program 14 times [2025-03-13 21:44:39,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:39,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079341702] [2025-03-13 21:44:39,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:39,601 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:39,605 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:39,605 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:39,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079341702] [2025-03-13 21:44:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079341702] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070924596] [2025-03-13 21:44:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:39,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:39,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:39,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:39,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:39,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 178 transitions, 3017 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:39,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:39,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:39,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:40,047 INFO L124 PetriNetUnfolderBase]: 1057/1817 cut-off events. [2025-03-13 21:44:40,051 INFO L125 PetriNetUnfolderBase]: For 19103/19177 co-relation queries the response was YES. [2025-03-13 21:44:40,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12274 conditions, 1817 events. 1057/1817 cut-off events. For 19103/19177 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9650 event pairs, 316 based on Foata normal form. 10/1827 useless extension candidates. Maximal degree in co-relation 12209. Up to 1194 conditions per place. [2025-03-13 21:44:40,073 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 138 selfloop transitions, 70 changer transitions 0/211 dead transitions. [2025-03-13 21:44:40,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 211 transitions, 3689 flow [2025-03-13 21:44:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2025-03-13 21:44:40,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3627450980392157 [2025-03-13 21:44:40,075 INFO L175 Difference]: Start difference. First operand has 189 places, 178 transitions, 3017 flow. Second operand 9 states and 111 transitions. [2025-03-13 21:44:40,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 211 transitions, 3689 flow [2025-03-13 21:44:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 211 transitions, 3549 flow, removed 41 selfloop flow, removed 6 redundant places. [2025-03-13 21:44:40,127 INFO L231 Difference]: Finished difference. Result has 193 places, 179 transitions, 3044 flow [2025-03-13 21:44:40,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3044, PETRI_PLACES=193, PETRI_TRANSITIONS=179} [2025-03-13 21:44:40,127 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2025-03-13 21:44:40,127 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 179 transitions, 3044 flow [2025-03-13 21:44:40,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:40,128 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:40,128 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] [2025-03-13 21:44:40,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2025-03-13 21:44:40,128 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:40,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash 258461790, now seen corresponding path program 15 times [2025-03-13 21:44:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389373217] [2025-03-13 21:44:40,128 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:40,135 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:40,142 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:40,142 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:44:40,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:40,278 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 21:44:40,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389373217] [2025-03-13 21:44:40,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389373217] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788777390] [2025-03-13 21:44:40,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:40,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:40,280 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:40,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-13 21:44:40,331 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:40,346 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:40,346 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:44:40,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:40,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-13 21:44:40,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:40,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:40,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2025-03-13 21:44:40,399 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 21:44:40,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:40,443 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:40,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:40,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788777390] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:40,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:40,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2025-03-13 21:44:40,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389266763] [2025-03-13 21:44:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:40,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:40,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:40,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:44:40,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:40,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 179 transitions, 3044 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:40,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:40,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:40,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:40,757 INFO L124 PetriNetUnfolderBase]: 1136/1957 cut-off events. [2025-03-13 21:44:40,757 INFO L125 PetriNetUnfolderBase]: For 20495/20579 co-relation queries the response was YES. [2025-03-13 21:44:40,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13351 conditions, 1957 events. 1136/1957 cut-off events. For 20495/20579 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10556 event pairs, 383 based on Foata normal form. 10/1967 useless extension candidates. Maximal degree in co-relation 13286. Up to 1230 conditions per place. [2025-03-13 21:44:40,772 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 152 selfloop transitions, 72 changer transitions 0/227 dead transitions. [2025-03-13 21:44:40,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 227 transitions, 3974 flow [2025-03-13 21:44:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2025-03-13 21:44:40,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-03-13 21:44:40,773 INFO L175 Difference]: Start difference. First operand has 193 places, 179 transitions, 3044 flow. Second operand 9 states and 126 transitions. [2025-03-13 21:44:40,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 227 transitions, 3974 flow [2025-03-13 21:44:40,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 227 transitions, 3837 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:40,825 INFO L231 Difference]: Finished difference. Result has 200 places, 189 transitions, 3323 flow [2025-03-13 21:44:40,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3323, PETRI_PLACES=200, PETRI_TRANSITIONS=189} [2025-03-13 21:44:40,826 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2025-03-13 21:44:40,826 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 189 transitions, 3323 flow [2025-03-13 21:44:40,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:40,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:40,826 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] [2025-03-13 21:44:40,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-13 21:44:41,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:41,027 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:41,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1221865516, now seen corresponding path program 16 times [2025-03-13 21:44:41,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:41,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789800194] [2025-03-13 21:44:41,027 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:41,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:41,032 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:41,033 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-03-13 21:44:41,033 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:44:41,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789800194] [2025-03-13 21:44:41,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789800194] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:41,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:41,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:44:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25883825] [2025-03-13 21:44:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:41,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:41,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:41,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:41,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:41,085 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:41,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 189 transitions, 3323 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:41,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:41,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:41,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:41,349 INFO L124 PetriNetUnfolderBase]: 1126/1949 cut-off events. [2025-03-13 21:44:41,350 INFO L125 PetriNetUnfolderBase]: For 20036/20116 co-relation queries the response was YES. [2025-03-13 21:44:41,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13190 conditions, 1949 events. 1126/1949 cut-off events. For 20036/20116 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10575 event pairs, 396 based on Foata normal form. 10/1959 useless extension candidates. Maximal degree in co-relation 13121. Up to 1311 conditions per place. [2025-03-13 21:44:41,363 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 137 selfloop transitions, 72 changer transitions 1/213 dead transitions. [2025-03-13 21:44:41,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 213 transitions, 3913 flow [2025-03-13 21:44:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:44:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:44:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2025-03-13 21:44:41,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4327731092436975 [2025-03-13 21:44:41,364 INFO L175 Difference]: Start difference. First operand has 200 places, 189 transitions, 3323 flow. Second operand 7 states and 103 transitions. [2025-03-13 21:44:41,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 213 transitions, 3913 flow [2025-03-13 21:44:41,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 213 transitions, 3749 flow, removed 24 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:41,414 INFO L231 Difference]: Finished difference. Result has 201 places, 189 transitions, 3285 flow [2025-03-13 21:44:41,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3285, PETRI_PLACES=201, PETRI_TRANSITIONS=189} [2025-03-13 21:44:41,415 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2025-03-13 21:44:41,415 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 189 transitions, 3285 flow [2025-03-13 21:44:41,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:41,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:41,415 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] [2025-03-13 21:44:41,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2025-03-13 21:44:41,415 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:41,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1246180293, now seen corresponding path program 12 times [2025-03-13 21:44:41,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:41,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312197881] [2025-03-13 21:44:41,416 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:41,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:41,420 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:41,430 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:41,430 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:44:41,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:41,588 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 21:44:41,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:41,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312197881] [2025-03-13 21:44:41,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312197881] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:41,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965248956] [2025-03-13 21:44:41,588 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:41,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:41,590 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:41,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-13 21:44:41,645 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:41,660 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:41,660 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:44:41,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:41,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-13 21:44:41,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:41,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:41,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2025-03-13 21:44:41,720 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 21:44:41,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:41,773 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-13 21:44:41,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-13 21:44:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:41,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965248956] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:41,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:41,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 18 [2025-03-13 21:44:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187740375] [2025-03-13 21:44:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:41,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:41,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:41,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:41,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:41,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:41,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 189 transitions, 3285 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:41,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:41,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:41,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:42,132 INFO L124 PetriNetUnfolderBase]: 1208/2117 cut-off events. [2025-03-13 21:44:42,132 INFO L125 PetriNetUnfolderBase]: For 19588/19664 co-relation queries the response was YES. [2025-03-13 21:44:42,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13907 conditions, 2117 events. 1208/2117 cut-off events. For 19588/19664 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11945 event pairs, 305 based on Foata normal form. 16/2133 useless extension candidates. Maximal degree in co-relation 13839. Up to 1176 conditions per place. [2025-03-13 21:44:42,149 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 178 selfloop transitions, 78 changer transitions 0/259 dead transitions. [2025-03-13 21:44:42,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 259 transitions, 4299 flow [2025-03-13 21:44:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2025-03-13 21:44:42,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-13 21:44:42,150 INFO L175 Difference]: Start difference. First operand has 201 places, 189 transitions, 3285 flow. Second operand 11 states and 153 transitions. [2025-03-13 21:44:42,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 259 transitions, 4299 flow [2025-03-13 21:44:42,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 259 transitions, 4106 flow, removed 8 selfloop flow, removed 13 redundant places. [2025-03-13 21:44:42,212 INFO L231 Difference]: Finished difference. Result has 202 places, 196 transitions, 3413 flow [2025-03-13 21:44:42,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3413, PETRI_PLACES=202, PETRI_TRANSITIONS=196} [2025-03-13 21:44:42,214 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2025-03-13 21:44:42,214 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 196 transitions, 3413 flow [2025-03-13 21:44:42,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:42,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:42,214 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] [2025-03-13 21:44:42,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-13 21:44:42,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2025-03-13 21:44:42,415 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:42,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1120271009, now seen corresponding path program 13 times [2025-03-13 21:44:42,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:42,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223181988] [2025-03-13 21:44:42,416 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:42,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:42,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:42,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:42,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:42,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:42,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:42,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223181988] [2025-03-13 21:44:42,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223181988] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:42,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:42,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:42,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139990706] [2025-03-13 21:44:42,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:42,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:42,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:42,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:42,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:42,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 196 transitions, 3413 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:42,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:42,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:42,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:42,890 INFO L124 PetriNetUnfolderBase]: 1202/2109 cut-off events. [2025-03-13 21:44:42,890 INFO L125 PetriNetUnfolderBase]: For 18626/18706 co-relation queries the response was YES. [2025-03-13 21:44:42,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13840 conditions, 2109 events. 1202/2109 cut-off events. For 18626/18706 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11893 event pairs, 329 based on Foata normal form. 6/2115 useless extension candidates. Maximal degree in co-relation 13778. Up to 1169 conditions per place. [2025-03-13 21:44:42,904 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 151 selfloop transitions, 68 changer transitions 16/238 dead transitions. [2025-03-13 21:44:42,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 238 transitions, 4086 flow [2025-03-13 21:44:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:44:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:44:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2025-03-13 21:44:42,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34558823529411764 [2025-03-13 21:44:42,905 INFO L175 Difference]: Start difference. First operand has 202 places, 196 transitions, 3413 flow. Second operand 12 states and 141 transitions. [2025-03-13 21:44:42,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 238 transitions, 4086 flow [2025-03-13 21:44:42,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 238 transitions, 4033 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-13 21:44:42,955 INFO L231 Difference]: Finished difference. Result has 211 places, 186 transitions, 3294 flow [2025-03-13 21:44:42,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3294, PETRI_PLACES=211, PETRI_TRANSITIONS=186} [2025-03-13 21:44:42,955 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2025-03-13 21:44:42,956 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 186 transitions, 3294 flow [2025-03-13 21:44:42,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:42,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:42,956 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] [2025-03-13 21:44:42,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2025-03-13 21:44:42,956 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:42,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1721257635, now seen corresponding path program 14 times [2025-03-13 21:44:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:42,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178334709] [2025-03-13 21:44:42,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:42,960 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:42,965 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:42,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:42,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:43,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:43,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178334709] [2025-03-13 21:44:43,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178334709] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:43,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:43,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:43,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397206329] [2025-03-13 21:44:43,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:43,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:43,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:43,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:43,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:43,117 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:43,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 186 transitions, 3294 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:43,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:43,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:43,468 INFO L124 PetriNetUnfolderBase]: 1171/2052 cut-off events. [2025-03-13 21:44:43,468 INFO L125 PetriNetUnfolderBase]: For 19903/19987 co-relation queries the response was YES. [2025-03-13 21:44:43,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13571 conditions, 2052 events. 1171/2052 cut-off events. For 19903/19987 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11491 event pairs, 361 based on Foata normal form. 6/2058 useless extension candidates. Maximal degree in co-relation 13509. Up to 1367 conditions per place. [2025-03-13 21:44:43,503 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 131 selfloop transitions, 70 changer transitions 8/212 dead transitions. [2025-03-13 21:44:43,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 212 transitions, 3826 flow [2025-03-13 21:44:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2025-03-13 21:44:43,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3315508021390374 [2025-03-13 21:44:43,504 INFO L175 Difference]: Start difference. First operand has 211 places, 186 transitions, 3294 flow. Second operand 11 states and 124 transitions. [2025-03-13 21:44:43,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 212 transitions, 3826 flow [2025-03-13 21:44:43,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 212 transitions, 3646 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-13 21:44:43,550 INFO L231 Difference]: Finished difference. Result has 205 places, 179 transitions, 3107 flow [2025-03-13 21:44:43,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3107, PETRI_PLACES=205, PETRI_TRANSITIONS=179} [2025-03-13 21:44:43,550 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2025-03-13 21:44:43,551 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 179 transitions, 3107 flow [2025-03-13 21:44:43,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:43,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:43,551 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] [2025-03-13 21:44:43,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2025-03-13 21:44:43,551 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:43,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash -70689649, now seen corresponding path program 15 times [2025-03-13 21:44:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:43,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287992630] [2025-03-13 21:44:43,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:43,556 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:43,558 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:43,558 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:43,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:43,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287992630] [2025-03-13 21:44:43,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287992630] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:43,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:43,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906244437] [2025-03-13 21:44:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:43,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:43,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:43,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:43,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:43,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:43,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 179 transitions, 3107 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:43,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:43,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:43,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:43,951 INFO L124 PetriNetUnfolderBase]: 1102/1915 cut-off events. [2025-03-13 21:44:43,951 INFO L125 PetriNetUnfolderBase]: For 17597/17677 co-relation queries the response was YES. [2025-03-13 21:44:43,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12799 conditions, 1915 events. 1102/1915 cut-off events. For 17597/17677 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10508 event pairs, 341 based on Foata normal form. 6/1921 useless extension candidates. Maximal degree in co-relation 12737. Up to 1281 conditions per place. [2025-03-13 21:44:43,964 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 127 selfloop transitions, 67 changer transitions 5/202 dead transitions. [2025-03-13 21:44:43,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 3586 flow [2025-03-13 21:44:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2025-03-13 21:44:43,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3323529411764706 [2025-03-13 21:44:43,965 INFO L175 Difference]: Start difference. First operand has 205 places, 179 transitions, 3107 flow. Second operand 10 states and 113 transitions. [2025-03-13 21:44:43,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 3586 flow [2025-03-13 21:44:44,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 3428 flow, removed 4 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:44,008 INFO L231 Difference]: Finished difference. Result has 199 places, 174 transitions, 2954 flow [2025-03-13 21:44:44,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2954, PETRI_PLACES=199, PETRI_TRANSITIONS=174} [2025-03-13 21:44:44,009 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2025-03-13 21:44:44,009 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 174 transitions, 2954 flow [2025-03-13 21:44:44,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:44,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:44,009 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] [2025-03-13 21:44:44,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2025-03-13 21:44:44,009 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:44,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash -634222, now seen corresponding path program 17 times [2025-03-13 21:44:44,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:44,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048849169] [2025-03-13 21:44:44,009 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:44,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:44,013 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:44,016 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:44,016 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:44,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:44,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048849169] [2025-03-13 21:44:44,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048849169] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966059893] [2025-03-13 21:44:44,234 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:44,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:44,237 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:44,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-13 21:44:44,296 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:44,315 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:44,315 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:44,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:44,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:44:44,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:44,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:44,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2025-03-13 21:44:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:44,376 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:44:44,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966059893] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:44,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:44:44,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2025-03-13 21:44:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281875025] [2025-03-13 21:44:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:44,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:44,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:44,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:44:44,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:44,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 174 transitions, 2954 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:44,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:44,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:44,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:44,688 INFO L124 PetriNetUnfolderBase]: 1075/1872 cut-off events. [2025-03-13 21:44:44,688 INFO L125 PetriNetUnfolderBase]: For 16686/16762 co-relation queries the response was YES. [2025-03-13 21:44:44,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12390 conditions, 1872 events. 1075/1872 cut-off events. For 16686/16762 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10219 event pairs, 326 based on Foata normal form. 7/1879 useless extension candidates. Maximal degree in co-relation 12330. Up to 1254 conditions per place. [2025-03-13 21:44:44,700 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 128 selfloop transitions, 61 changer transitions 6/198 dead transitions. [2025-03-13 21:44:44,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 198 transitions, 3441 flow [2025-03-13 21:44:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-13 21:44:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-13 21:44:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2025-03-13 21:44:44,701 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-03-13 21:44:44,701 INFO L175 Difference]: Start difference. First operand has 199 places, 174 transitions, 2954 flow. Second operand 8 states and 102 transitions. [2025-03-13 21:44:44,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 198 transitions, 3441 flow [2025-03-13 21:44:44,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 198 transitions, 3281 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-03-13 21:44:44,741 INFO L231 Difference]: Finished difference. Result has 191 places, 169 transitions, 2793 flow [2025-03-13 21:44:44,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2793, PETRI_PLACES=191, PETRI_TRANSITIONS=169} [2025-03-13 21:44:44,742 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2025-03-13 21:44:44,742 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 169 transitions, 2793 flow [2025-03-13 21:44:44,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:44,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:44,742 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:44,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-13 21:44:44,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2025-03-13 21:44:44,943 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:44,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:44,943 INFO L85 PathProgramCache]: Analyzing trace with hash 807091361, now seen corresponding path program 16 times [2025-03-13 21:44:44,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:44,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618356553] [2025-03-13 21:44:44,943 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:44,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:44,947 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:44,949 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-03-13 21:44:44,949 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:44:44,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:44,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618356553] [2025-03-13 21:44:44,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618356553] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:44,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:44,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-13 21:44:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041840889] [2025-03-13 21:44:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:44,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:44,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:44,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:45,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:45,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 169 transitions, 2793 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:45,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:45,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:45,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:45,248 INFO L124 PetriNetUnfolderBase]: 1095/1901 cut-off events. [2025-03-13 21:44:45,248 INFO L125 PetriNetUnfolderBase]: For 18475/18555 co-relation queries the response was YES. [2025-03-13 21:44:45,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12556 conditions, 1901 events. 1095/1901 cut-off events. For 18475/18555 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10301 event pairs, 376 based on Foata normal form. 16/1917 useless extension candidates. Maximal degree in co-relation 12498. Up to 1270 conditions per place. [2025-03-13 21:44:45,288 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 129 selfloop transitions, 63 changer transitions 0/195 dead transitions. [2025-03-13 21:44:45,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 195 transitions, 3387 flow [2025-03-13 21:44:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:44:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:44:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2025-03-13 21:44:45,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-03-13 21:44:45,289 INFO L175 Difference]: Start difference. First operand has 191 places, 169 transitions, 2793 flow. Second operand 7 states and 102 transitions. [2025-03-13 21:44:45,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 195 transitions, 3387 flow [2025-03-13 21:44:45,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 195 transitions, 3251 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:45,323 INFO L231 Difference]: Finished difference. Result has 188 places, 173 transitions, 2887 flow [2025-03-13 21:44:45,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2887, PETRI_PLACES=188, PETRI_TRANSITIONS=173} [2025-03-13 21:44:45,323 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2025-03-13 21:44:45,323 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 173 transitions, 2887 flow [2025-03-13 21:44:45,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:45,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:45,323 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] [2025-03-13 21:44:45,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2025-03-13 21:44:45,324 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:45,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1299687123, now seen corresponding path program 17 times [2025-03-13 21:44:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:45,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327683924] [2025-03-13 21:44:45,324 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:45,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:45,329 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:45,332 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:45,333 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:45,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:45,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327683924] [2025-03-13 21:44:45,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327683924] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:45,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541068746] [2025-03-13 21:44:45,456 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:44:45,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:45,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:45,458 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:45,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-13 21:44:45,512 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:45,527 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:45,527 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:44:45,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:45,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-13 21:44:45,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:45,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:44:45,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2025-03-13 21:44:45,588 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 21:44:45,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:45,634 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-13 21:44:45,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-13 21:44:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:45,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541068746] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:45,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:44:45,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2025-03-13 21:44:45,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756026991] [2025-03-13 21:44:45,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:45,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:45,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:45,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:45,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:44:45,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:45,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 173 transitions, 2887 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:45,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:45,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:45,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:45,942 INFO L124 PetriNetUnfolderBase]: 1139/2019 cut-off events. [2025-03-13 21:44:45,942 INFO L125 PetriNetUnfolderBase]: For 17342/17410 co-relation queries the response was YES. [2025-03-13 21:44:45,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12882 conditions, 2019 events. 1139/2019 cut-off events. For 17342/17410 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11281 event pairs, 360 based on Foata normal form. 16/2035 useless extension candidates. Maximal degree in co-relation 12823. Up to 1244 conditions per place. [2025-03-13 21:44:45,958 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 145 selfloop transitions, 67 changer transitions 1/216 dead transitions. [2025-03-13 21:44:45,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 216 transitions, 3568 flow [2025-03-13 21:44:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2025-03-13 21:44:45,959 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2025-03-13 21:44:45,959 INFO L175 Difference]: Start difference. First operand has 188 places, 173 transitions, 2887 flow. Second operand 10 states and 137 transitions. [2025-03-13 21:44:45,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 216 transitions, 3568 flow [2025-03-13 21:44:45,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 216 transitions, 3475 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-03-13 21:44:45,998 INFO L231 Difference]: Finished difference. Result has 192 places, 174 transitions, 2917 flow [2025-03-13 21:44:45,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2917, PETRI_PLACES=192, PETRI_TRANSITIONS=174} [2025-03-13 21:44:45,998 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2025-03-13 21:44:45,998 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 174 transitions, 2917 flow [2025-03-13 21:44:45,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:45,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:45,998 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] [2025-03-13 21:44:46,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:46,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2025-03-13 21:44:46,199 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:46,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1439528459, now seen corresponding path program 18 times [2025-03-13 21:44:46,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:46,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261957398] [2025-03-13 21:44:46,200 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:46,204 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:46,207 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:46,207 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:46,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261957398] [2025-03-13 21:44:46,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261957398] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:46,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:46,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614707919] [2025-03-13 21:44:46,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:46,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:46,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:46,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:46,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:46,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:46,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 174 transitions, 2917 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:46,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:46,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:46,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:46,613 INFO L124 PetriNetUnfolderBase]: 1079/1893 cut-off events. [2025-03-13 21:44:46,613 INFO L125 PetriNetUnfolderBase]: For 16070/16144 co-relation queries the response was YES. [2025-03-13 21:44:46,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12181 conditions, 1893 events. 1079/1893 cut-off events. For 16070/16144 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 10387 event pairs, 370 based on Foata normal form. 6/1899 useless extension candidates. Maximal degree in co-relation 12125. Up to 1263 conditions per place. [2025-03-13 21:44:46,625 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 116 selfloop transitions, 64 changer transitions 5/188 dead transitions. [2025-03-13 21:44:46,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 188 transitions, 3294 flow [2025-03-13 21:44:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2025-03-13 21:44:46,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3323529411764706 [2025-03-13 21:44:46,626 INFO L175 Difference]: Start difference. First operand has 192 places, 174 transitions, 2917 flow. Second operand 10 states and 113 transitions. [2025-03-13 21:44:46,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 188 transitions, 3294 flow [2025-03-13 21:44:46,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 188 transitions, 3109 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-03-13 21:44:46,655 INFO L231 Difference]: Finished difference. Result has 187 places, 169 transitions, 2734 flow [2025-03-13 21:44:46,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2734, PETRI_PLACES=187, PETRI_TRANSITIONS=169} [2025-03-13 21:44:46,655 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2025-03-13 21:44:46,655 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 169 transitions, 2734 flow [2025-03-13 21:44:46,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:46,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:46,655 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] [2025-03-13 21:44:46,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2025-03-13 21:44:46,656 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:46,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1819789529, now seen corresponding path program 19 times [2025-03-13 21:44:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:46,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540906510] [2025-03-13 21:44:46,656 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:46,660 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:46,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:46,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:46,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:46,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:46,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540906510] [2025-03-13 21:44:46,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540906510] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:46,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:46,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295543544] [2025-03-13 21:44:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:46,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:46,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:46,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:46,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:46,807 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:46,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 169 transitions, 2734 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:46,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:46,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:46,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:47,051 INFO L124 PetriNetUnfolderBase]: 1070/1884 cut-off events. [2025-03-13 21:44:47,051 INFO L125 PetriNetUnfolderBase]: For 14500/14566 co-relation queries the response was YES. [2025-03-13 21:44:47,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11889 conditions, 1884 events. 1070/1884 cut-off events. For 14500/14566 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10343 event pairs, 366 based on Foata normal form. 6/1890 useless extension candidates. Maximal degree in co-relation 11841. Up to 1253 conditions per place. [2025-03-13 21:44:47,065 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 116 selfloop transitions, 60 changer transitions 5/184 dead transitions. [2025-03-13 21:44:47,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 184 transitions, 3128 flow [2025-03-13 21:44:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2025-03-13 21:44:47,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3352941176470588 [2025-03-13 21:44:47,066 INFO L175 Difference]: Start difference. First operand has 187 places, 169 transitions, 2734 flow. Second operand 10 states and 114 transitions. [2025-03-13 21:44:47,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 184 transitions, 3128 flow [2025-03-13 21:44:47,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 2976 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-13 21:44:47,093 INFO L231 Difference]: Finished difference. Result has 184 places, 165 transitions, 2609 flow [2025-03-13 21:44:47,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2609, PETRI_PLACES=184, PETRI_TRANSITIONS=165} [2025-03-13 21:44:47,093 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2025-03-13 21:44:47,093 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 165 transitions, 2609 flow [2025-03-13 21:44:47,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:47,093 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:47,093 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] [2025-03-13 21:44:47,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2025-03-13 21:44:47,094 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:47,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:47,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1467564569, now seen corresponding path program 20 times [2025-03-13 21:44:47,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:47,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669812727] [2025-03-13 21:44:47,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:47,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:47,099 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:47,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:47,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:47,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:47,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:47,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669812727] [2025-03-13 21:44:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669812727] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:47,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:47,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:47,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254727463] [2025-03-13 21:44:47,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:47,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:47,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:47,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:47,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:47,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:47,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 165 transitions, 2609 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:47,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:47,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:47,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:47,526 INFO L124 PetriNetUnfolderBase]: 1008/1754 cut-off events. [2025-03-13 21:44:47,526 INFO L125 PetriNetUnfolderBase]: For 13437/13507 co-relation queries the response was YES. [2025-03-13 21:44:47,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11173 conditions, 1754 events. 1008/1754 cut-off events. For 13437/13507 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9389 event pairs, 340 based on Foata normal form. 6/1760 useless extension candidates. Maximal degree in co-relation 11125. Up to 1151 conditions per place. [2025-03-13 21:44:47,536 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 53 changer transitions 11/177 dead transitions. [2025-03-13 21:44:47,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 177 transitions, 2941 flow [2025-03-13 21:44:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2025-03-13 21:44:47,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3155080213903743 [2025-03-13 21:44:47,537 INFO L175 Difference]: Start difference. First operand has 184 places, 165 transitions, 2609 flow. Second operand 11 states and 118 transitions. [2025-03-13 21:44:47,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 177 transitions, 2941 flow [2025-03-13 21:44:47,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 177 transitions, 2822 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-13 21:44:47,562 INFO L231 Difference]: Finished difference. Result has 181 places, 157 transitions, 2449 flow [2025-03-13 21:44:47,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2449, PETRI_PLACES=181, PETRI_TRANSITIONS=157} [2025-03-13 21:44:47,563 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2025-03-13 21:44:47,563 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 157 transitions, 2449 flow [2025-03-13 21:44:47,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:47,563 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:47,563 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] [2025-03-13 21:44:47,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2025-03-13 21:44:47,563 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:47,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1509240198, now seen corresponding path program 18 times [2025-03-13 21:44:47,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:47,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873762246] [2025-03-13 21:44:47,563 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:44:47,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:47,568 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:47,570 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:47,571 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:44:47,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:47,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:47,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873762246] [2025-03-13 21:44:47,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873762246] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:47,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:47,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197760692] [2025-03-13 21:44:47,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:47,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:47,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:47,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:47,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:47,696 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:47,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 157 transitions, 2449 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:47,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:47,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:47,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:47,917 INFO L124 PetriNetUnfolderBase]: 944/1638 cut-off events. [2025-03-13 21:44:47,917 INFO L125 PetriNetUnfolderBase]: For 12775/12835 co-relation queries the response was YES. [2025-03-13 21:44:47,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10523 conditions, 1638 events. 944/1638 cut-off events. For 12775/12835 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8620 event pairs, 305 based on Foata normal form. 7/1645 useless extension candidates. Maximal degree in co-relation 10475. Up to 1060 conditions per place. [2025-03-13 21:44:47,927 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 109 selfloop transitions, 51 changer transitions 6/169 dead transitions. [2025-03-13 21:44:47,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 169 transitions, 2794 flow [2025-03-13 21:44:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2025-03-13 21:44:47,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3264705882352941 [2025-03-13 21:44:47,928 INFO L175 Difference]: Start difference. First operand has 181 places, 157 transitions, 2449 flow. Second operand 10 states and 111 transitions. [2025-03-13 21:44:47,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 169 transitions, 2794 flow [2025-03-13 21:44:47,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 169 transitions, 2631 flow, removed 2 selfloop flow, removed 8 redundant places. [2025-03-13 21:44:47,967 INFO L231 Difference]: Finished difference. Result has 172 places, 153 transitions, 2306 flow [2025-03-13 21:44:47,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2306, PETRI_PLACES=172, PETRI_TRANSITIONS=153} [2025-03-13 21:44:47,967 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2025-03-13 21:44:47,967 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 153 transitions, 2306 flow [2025-03-13 21:44:47,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:47,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:47,968 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] [2025-03-13 21:44:47,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2025-03-13 21:44:47,968 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:47,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1016644436, now seen corresponding path program 19 times [2025-03-13 21:44:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529998795] [2025-03-13 21:44:47,968 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:44:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:47,972 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-13 21:44:47,976 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-13 21:44:47,976 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:47,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:48,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:48,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529998795] [2025-03-13 21:44:48,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529998795] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:48,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:48,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:48,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458724162] [2025-03-13 21:44:48,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:48,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:48,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:48,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:48,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:48,127 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:48,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 153 transitions, 2306 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:48,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:48,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:48,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:48,334 INFO L124 PetriNetUnfolderBase]: 942/1636 cut-off events. [2025-03-13 21:44:48,334 INFO L125 PetriNetUnfolderBase]: For 11642/11702 co-relation queries the response was YES. [2025-03-13 21:44:48,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10345 conditions, 1636 events. 942/1636 cut-off events. For 11642/11702 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8606 event pairs, 305 based on Foata normal form. 7/1643 useless extension candidates. Maximal degree in co-relation 10297. Up to 1060 conditions per place. [2025-03-13 21:44:48,343 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 107 selfloop transitions, 52 changer transitions 6/168 dead transitions. [2025-03-13 21:44:48,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 168 transitions, 2711 flow [2025-03-13 21:44:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2025-03-13 21:44:48,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3176470588235294 [2025-03-13 21:44:48,344 INFO L175 Difference]: Start difference. First operand has 172 places, 153 transitions, 2306 flow. Second operand 10 states and 108 transitions. [2025-03-13 21:44:48,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 168 transitions, 2711 flow [2025-03-13 21:44:48,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 168 transitions, 2607 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:48,365 INFO L231 Difference]: Finished difference. Result has 172 places, 152 transitions, 2293 flow [2025-03-13 21:44:48,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2293, PETRI_PLACES=172, PETRI_TRANSITIONS=152} [2025-03-13 21:44:48,366 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2025-03-13 21:44:48,366 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 152 transitions, 2293 flow [2025-03-13 21:44:48,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:48,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:48,366 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] [2025-03-13 21:44:48,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2025-03-13 21:44:48,366 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:48,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash -23591362, now seen corresponding path program 20 times [2025-03-13 21:44:48,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:48,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592120943] [2025-03-13 21:44:48,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:48,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:48,370 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-13 21:44:48,373 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 26 statements. [2025-03-13 21:44:48,373 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:48,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:48,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592120943] [2025-03-13 21:44:48,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592120943] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:48,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:48,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:44:48,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099917294] [2025-03-13 21:44:48,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:48,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:44:48,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:48,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:44:48,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:44:48,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:48,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 152 transitions, 2293 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:48,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:48,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:48,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:48,727 INFO L124 PetriNetUnfolderBase]: 885/1530 cut-off events. [2025-03-13 21:44:48,727 INFO L125 PetriNetUnfolderBase]: For 10827/10881 co-relation queries the response was YES. [2025-03-13 21:44:48,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9786 conditions, 1530 events. 885/1530 cut-off events. For 10827/10881 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7920 event pairs, 278 based on Foata normal form. 7/1537 useless extension candidates. Maximal degree in co-relation 9738. Up to 969 conditions per place. [2025-03-13 21:44:48,734 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 104 selfloop transitions, 46 changer transitions 13/166 dead transitions. [2025-03-13 21:44:48,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 166 transitions, 2619 flow [2025-03-13 21:44:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-13 21:44:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-13 21:44:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2025-03-13 21:44:48,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3074866310160428 [2025-03-13 21:44:48,735 INFO L175 Difference]: Start difference. First operand has 172 places, 152 transitions, 2293 flow. Second operand 11 states and 115 transitions. [2025-03-13 21:44:48,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 166 transitions, 2619 flow [2025-03-13 21:44:48,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 166 transitions, 2524 flow, removed 1 selfloop flow, removed 7 redundant places. [2025-03-13 21:44:48,755 INFO L231 Difference]: Finished difference. Result has 173 places, 144 transitions, 2148 flow [2025-03-13 21:44:48,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2148, PETRI_PLACES=173, PETRI_TRANSITIONS=144} [2025-03-13 21:44:48,755 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2025-03-13 21:44:48,755 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 144 transitions, 2148 flow [2025-03-13 21:44:48,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:48,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:48,755 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 21:44:48,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2025-03-13 21:44:48,755 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:48,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -782616633, now seen corresponding path program 1 times [2025-03-13 21:44:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:48,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860048025] [2025-03-13 21:44:48,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:48,760 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:44:48,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:44:48,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:48,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:48,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:48,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860048025] [2025-03-13 21:44:48,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860048025] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:48,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290301942] [2025-03-13 21:44:48,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:48,924 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:48,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-13 21:44:48,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:44:48,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:44:48,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:48,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:48,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-13 21:44:48,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:49,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:49,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290301942] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:49,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:49,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2025-03-13 21:44:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568906297] [2025-03-13 21:44:49,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:49,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-13 21:44:49,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:49,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-13 21:44:49,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2025-03-13 21:44:49,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2025-03-13 21:44:49,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 144 transitions, 2148 flow. Second operand has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 29 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:49,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:49,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2025-03-13 21:44:49,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:50,394 INFO L124 PetriNetUnfolderBase]: 2919/4984 cut-off events. [2025-03-13 21:44:50,395 INFO L125 PetriNetUnfolderBase]: For 34924/35016 co-relation queries the response was YES. [2025-03-13 21:44:50,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31304 conditions, 4984 events. 2919/4984 cut-off events. For 34924/35016 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31814 event pairs, 493 based on Foata normal form. 9/4993 useless extension candidates. Maximal degree in co-relation 31256. Up to 1032 conditions per place. [2025-03-13 21:44:50,430 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 438 selfloop transitions, 94 changer transitions 3/537 dead transitions. [2025-03-13 21:44:50,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 537 transitions, 8440 flow [2025-03-13 21:44:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-13 21:44:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-13 21:44:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 266 transitions. [2025-03-13 21:44:50,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3911764705882353 [2025-03-13 21:44:50,431 INFO L175 Difference]: Start difference. First operand has 173 places, 144 transitions, 2148 flow. Second operand 20 states and 266 transitions. [2025-03-13 21:44:50,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 537 transitions, 8440 flow [2025-03-13 21:44:50,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 537 transitions, 8060 flow, removed 4 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:50,533 INFO L231 Difference]: Finished difference. Result has 183 places, 229 transitions, 3793 flow [2025-03-13 21:44:50,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3793, PETRI_PLACES=183, PETRI_TRANSITIONS=229} [2025-03-13 21:44:50,535 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2025-03-13 21:44:50,535 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 229 transitions, 3793 flow [2025-03-13 21:44:50,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 29 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:44:50,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:50,537 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:50,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-13 21:44:50,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:50,738 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:50,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:50,738 INFO L85 PathProgramCache]: Analyzing trace with hash 869027146, now seen corresponding path program 2 times [2025-03-13 21:44:50,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:50,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893531260] [2025-03-13 21:44:50,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:44:50,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:50,743 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:44:50,745 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 28 statements. [2025-03-13 21:44:50,745 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:44:50,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-13 21:44:50,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893531260] [2025-03-13 21:44:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893531260] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-13 21:44:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885145964] [2025-03-13 21:44:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:50,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:50,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:50,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:50,823 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:50,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 229 transitions, 3793 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:50,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:50,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:50,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:51,608 INFO L124 PetriNetUnfolderBase]: 4274/7260 cut-off events. [2025-03-13 21:44:51,608 INFO L125 PetriNetUnfolderBase]: For 59051/59331 co-relation queries the response was YES. [2025-03-13 21:44:51,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48976 conditions, 7260 events. 4274/7260 cut-off events. For 59051/59331 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 49953 event pairs, 168 based on Foata normal form. 18/7278 useless extension candidates. Maximal degree in co-relation 48919. Up to 1670 conditions per place. [2025-03-13 21:44:51,654 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 343 selfloop transitions, 99 changer transitions 6/451 dead transitions. [2025-03-13 21:44:51,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 451 transitions, 8048 flow [2025-03-13 21:44:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:44:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:44:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2025-03-13 21:44:51,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43823529411764706 [2025-03-13 21:44:51,655 INFO L175 Difference]: Start difference. First operand has 183 places, 229 transitions, 3793 flow. Second operand 10 states and 149 transitions. [2025-03-13 21:44:51,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 451 transitions, 8048 flow [2025-03-13 21:44:51,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 451 transitions, 7971 flow, removed 24 selfloop flow, removed 2 redundant places. [2025-03-13 21:44:51,875 INFO L231 Difference]: Finished difference. Result has 193 places, 275 transitions, 4756 flow [2025-03-13 21:44:51,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4756, PETRI_PLACES=193, PETRI_TRANSITIONS=275} [2025-03-13 21:44:51,875 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2025-03-13 21:44:51,875 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 275 transitions, 4756 flow [2025-03-13 21:44:51,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:51,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:51,875 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:51,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2025-03-13 21:44:51,876 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:51,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash 420610026, now seen corresponding path program 3 times [2025-03-13 21:44:51,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:51,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997877895] [2025-03-13 21:44:51,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:44:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:51,881 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:44:51,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 28 statements. [2025-03-13 21:44:51,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-13 21:44:51,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-13 21:44:51,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:51,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997877895] [2025-03-13 21:44:51,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997877895] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:44:51,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:44:51,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-13 21:44:51,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149666414] [2025-03-13 21:44:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:44:51,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:44:51,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:51,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:44:51,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:44:51,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:51,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 275 transitions, 4756 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:51,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:51,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:51,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:52,941 INFO L124 PetriNetUnfolderBase]: 4259/7245 cut-off events. [2025-03-13 21:44:52,941 INFO L125 PetriNetUnfolderBase]: For 65577/65850 co-relation queries the response was YES. [2025-03-13 21:44:52,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50170 conditions, 7245 events. 4259/7245 cut-off events. For 65577/65850 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 49650 event pairs, 160 based on Foata normal form. 18/7263 useless extension candidates. Maximal degree in co-relation 50110. Up to 1767 conditions per place. [2025-03-13 21:44:53,009 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 314 selfloop transitions, 105 changer transitions 6/428 dead transitions. [2025-03-13 21:44:53,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 428 transitions, 8009 flow [2025-03-13 21:44:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:44:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:44:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2025-03-13 21:44:53,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4150326797385621 [2025-03-13 21:44:53,010 INFO L175 Difference]: Start difference. First operand has 193 places, 275 transitions, 4756 flow. Second operand 9 states and 127 transitions. [2025-03-13 21:44:53,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 428 transitions, 8009 flow [2025-03-13 21:44:53,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 428 transitions, 7793 flow, removed 27 selfloop flow, removed 4 redundant places. [2025-03-13 21:44:53,282 INFO L231 Difference]: Finished difference. Result has 198 places, 281 transitions, 4916 flow [2025-03-13 21:44:53,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4916, PETRI_PLACES=198, PETRI_TRANSITIONS=281} [2025-03-13 21:44:53,282 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2025-03-13 21:44:53,282 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 281 transitions, 4916 flow [2025-03-13 21:44:53,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:44:53,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:53,283 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:53,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2025-03-13 21:44:53,283 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:53,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1733097057, now seen corresponding path program 1 times [2025-03-13 21:44:53,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:53,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333014879] [2025-03-13 21:44:53,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:53,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:44:53,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:44:53,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:53,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:53,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333014879] [2025-03-13 21:44:53,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333014879] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505584391] [2025-03-13 21:44:53,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:53,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:53,332 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:53,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-13 21:44:53,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:44:53,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:44:53,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:53,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:53,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:44:53,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:53,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:53,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505584391] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:53,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:53,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-03-13 21:44:53,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970542950] [2025-03-13 21:44:53,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:53,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-13 21:44:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:53,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-13 21:44:53,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-03-13 21:44:53,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:53,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 281 transitions, 4916 flow. Second operand has 16 states, 16 states have (on average 8.0) internal successors, (128), 16 states have internal predecessors, (128), 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 21:44:53,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:53,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:53,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:54,547 INFO L124 PetriNetUnfolderBase]: 5134/9030 cut-off events. [2025-03-13 21:44:54,548 INFO L125 PetriNetUnfolderBase]: For 96638/96978 co-relation queries the response was YES. [2025-03-13 21:44:54,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64179 conditions, 9030 events. 5134/9030 cut-off events. For 96638/96978 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 67500 event pairs, 1271 based on Foata normal form. 316/9346 useless extension candidates. Maximal degree in co-relation 64119. Up to 2233 conditions per place. [2025-03-13 21:44:54,666 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 530 selfloop transitions, 141 changer transitions 22/696 dead transitions. [2025-03-13 21:44:54,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 696 transitions, 12276 flow [2025-03-13 21:44:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-13 21:44:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-13 21:44:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 245 transitions. [2025-03-13 21:44:54,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42387543252595156 [2025-03-13 21:44:54,667 INFO L175 Difference]: Start difference. First operand has 198 places, 281 transitions, 4916 flow. Second operand 17 states and 245 transitions. [2025-03-13 21:44:54,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 696 transitions, 12276 flow [2025-03-13 21:44:55,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 696 transitions, 12123 flow, removed 22 selfloop flow, removed 3 redundant places. [2025-03-13 21:44:55,058 INFO L231 Difference]: Finished difference. Result has 212 places, 337 transitions, 6515 flow [2025-03-13 21:44:55,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6515, PETRI_PLACES=212, PETRI_TRANSITIONS=337} [2025-03-13 21:44:55,059 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2025-03-13 21:44:55,059 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 337 transitions, 6515 flow [2025-03-13 21:44:55,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.0) internal successors, (128), 16 states have internal predecessors, (128), 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 21:44:55,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:55,059 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:55,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-13 21:44:55,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:55,260 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:55,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1445298812, now seen corresponding path program 1 times [2025-03-13 21:44:55,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:55,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845181537] [2025-03-13 21:44:55,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:55,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:44:55,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:44:55,267 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:55,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845181537] [2025-03-13 21:44:55,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845181537] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329993822] [2025-03-13 21:44:55,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:44:55,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:55,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:55,306 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:55,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-13 21:44:55,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:44:55,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:44:55,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:44:55,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:55,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:44:55,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:55,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:44:55,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329993822] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:55,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:55,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-03-13 21:44:55,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136932956] [2025-03-13 21:44:55,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:55,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-13 21:44:55,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:55,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-13 21:44:55,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-03-13 21:44:55,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:44:55,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 337 transitions, 6515 flow. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 16 states have internal predecessors, (135), 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 21:44:55,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:55,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:44:55,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:44:56,526 INFO L124 PetriNetUnfolderBase]: 3599/6902 cut-off events. [2025-03-13 21:44:56,527 INFO L125 PetriNetUnfolderBase]: For 80414/80580 co-relation queries the response was YES. [2025-03-13 21:44:56,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49431 conditions, 6902 events. 3599/6902 cut-off events. For 80414/80580 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 54558 event pairs, 1037 based on Foata normal form. 324/7226 useless extension candidates. Maximal degree in co-relation 49369. Up to 2233 conditions per place. [2025-03-13 21:44:56,571 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 334 selfloop transitions, 85 changer transitions 148/570 dead transitions. [2025-03-13 21:44:56,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 570 transitions, 10487 flow [2025-03-13 21:44:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-13 21:44:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-13 21:44:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 229 transitions. [2025-03-13 21:44:56,572 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3961937716262976 [2025-03-13 21:44:56,572 INFO L175 Difference]: Start difference. First operand has 212 places, 337 transitions, 6515 flow. Second operand 17 states and 229 transitions. [2025-03-13 21:44:56,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 570 transitions, 10487 flow [2025-03-13 21:44:56,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 570 transitions, 10120 flow, removed 113 selfloop flow, removed 11 redundant places. [2025-03-13 21:44:56,819 INFO L231 Difference]: Finished difference. Result has 222 places, 326 transitions, 6098 flow [2025-03-13 21:44:56,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6098, PETRI_PLACES=222, PETRI_TRANSITIONS=326} [2025-03-13 21:44:56,820 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2025-03-13 21:44:56,820 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 326 transitions, 6098 flow [2025-03-13 21:44:56,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 16 states have internal predecessors, (135), 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 21:44:56,820 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:44:56,820 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:44:56,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-03-13 21:44:57,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2025-03-13 21:44:57,021 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:44:57,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:44:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash -695716090, now seen corresponding path program 4 times [2025-03-13 21:44:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:44:57,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18194684] [2025-03-13 21:44:57,021 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:44:57,025 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:44:57,028 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:44:57,028 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:44:57,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:57,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:44:57,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18194684] [2025-03-13 21:44:57,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18194684] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:44:57,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181176339] [2025-03-13 21:44:57,221 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:44:57,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:44:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:44:57,223 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:44:57,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-13 21:44:57,284 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:44:57,298 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:44:57,298 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:44:57,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:44:57,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-13 21:44:57,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:44:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:57,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:44:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:44:58,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181176339] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:44:58,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:44:58,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2025-03-13 21:44:58,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847957362] [2025-03-13 21:44:58,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:44:58,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-13 21:44:58,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:44:58,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-13 21:44:58,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2025-03-13 21:44:58,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2025-03-13 21:44:58,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 326 transitions, 6098 flow. Second operand has 33 states, 33 states have (on average 6.363636363636363) internal successors, (210), 33 states have internal predecessors, (210), 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 21:44:58,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:44:58,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2025-03-13 21:44:58,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:45:00,658 INFO L124 PetriNetUnfolderBase]: 5057/8888 cut-off events. [2025-03-13 21:45:00,658 INFO L125 PetriNetUnfolderBase]: For 112360/112460 co-relation queries the response was YES. [2025-03-13 21:45:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63299 conditions, 8888 events. 5057/8888 cut-off events. For 112360/112460 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 64711 event pairs, 592 based on Foata normal form. 5/8893 useless extension candidates. Maximal degree in co-relation 63235. Up to 1729 conditions per place. [2025-03-13 21:45:00,752 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 799 selfloop transitions, 208 changer transitions 114/1123 dead transitions. [2025-03-13 21:45:00,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1123 transitions, 19873 flow [2025-03-13 21:45:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-13 21:45:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-03-13 21:45:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 559 transitions. [2025-03-13 21:45:00,753 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365359477124183 [2025-03-13 21:45:00,753 INFO L175 Difference]: Start difference. First operand has 222 places, 326 transitions, 6098 flow. Second operand 45 states and 559 transitions. [2025-03-13 21:45:00,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1123 transitions, 19873 flow [2025-03-13 21:45:01,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1123 transitions, 19553 flow, removed 153 selfloop flow, removed 12 redundant places. [2025-03-13 21:45:01,337 INFO L231 Difference]: Finished difference. Result has 264 places, 466 transitions, 9274 flow [2025-03-13 21:45:01,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6012, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9274, PETRI_PLACES=264, PETRI_TRANSITIONS=466} [2025-03-13 21:45:01,338 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2025-03-13 21:45:01,338 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 466 transitions, 9274 flow [2025-03-13 21:45:01,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.363636363636363) internal successors, (210), 33 states have internal predecessors, (210), 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 21:45:01,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:45:01,338 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:45:01,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-13 21:45:01,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:45:01,538 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:45:01,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:45:01,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1650760206, now seen corresponding path program 5 times [2025-03-13 21:45:01,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:45:01,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277884085] [2025-03-13 21:45:01,539 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:45:01,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:45:01,545 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:45:01,550 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:45:01,550 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:45:01,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:45:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:45:01,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:45:01,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277884085] [2025-03-13 21:45:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277884085] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:45:01,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65547394] [2025-03-13 21:45:01,661 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:45:01,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:45:01,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:45:01,663 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:45:01,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-13 21:45:01,727 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:45:01,744 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:45:01,744 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:45:01,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:45:01,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-13 21:45:01,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:45:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:45:01,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:45:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:45:02,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65547394] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:45:02,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:45:02,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2025-03-13 21:45:02,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104707492] [2025-03-13 21:45:02,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:45:02,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-13 21:45:02,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:45:02,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-13 21:45:02,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2025-03-13 21:45:02,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:45:02,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 466 transitions, 9274 flow. Second operand has 32 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 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 21:45:02,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:45:02,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:45:02,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:45:04,034 INFO L124 PetriNetUnfolderBase]: 4300/7909 cut-off events. [2025-03-13 21:45:04,034 INFO L125 PetriNetUnfolderBase]: For 121286/121480 co-relation queries the response was YES. [2025-03-13 21:45:04,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60571 conditions, 7909 events. 4300/7909 cut-off events. For 121286/121480 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 59579 event pairs, 734 based on Foata normal form. 15/7924 useless extension candidates. Maximal degree in co-relation 60491. Up to 1740 conditions per place. [2025-03-13 21:45:04,098 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 612 selfloop transitions, 114 changer transitions 29/762 dead transitions. [2025-03-13 21:45:04,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 762 transitions, 14599 flow [2025-03-13 21:45:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-13 21:45:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-13 21:45:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 362 transitions. [2025-03-13 21:45:04,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3671399594320487 [2025-03-13 21:45:04,099 INFO L175 Difference]: Start difference. First operand has 264 places, 466 transitions, 9274 flow. Second operand 29 states and 362 transitions. [2025-03-13 21:45:04,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 762 transitions, 14599 flow [2025-03-13 21:45:04,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 762 transitions, 14237 flow, removed 172 selfloop flow, removed 14 redundant places. [2025-03-13 21:45:04,734 INFO L231 Difference]: Finished difference. Result has 275 places, 468 transitions, 9262 flow [2025-03-13 21:45:04,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8956, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9262, PETRI_PLACES=275, PETRI_TRANSITIONS=468} [2025-03-13 21:45:04,734 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2025-03-13 21:45:04,734 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 468 transitions, 9262 flow [2025-03-13 21:45:04,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 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 21:45:04,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:45:04,734 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:45:04,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-03-13 21:45:04,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:45:04,935 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:45:04,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:45:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash 784623930, now seen corresponding path program 6 times [2025-03-13 21:45:04,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:45:04,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604387730] [2025-03-13 21:45:04,936 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:45:04,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:45:04,941 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:45:04,943 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 23 of 28 statements. [2025-03-13 21:45:04,943 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:45:04,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:45:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-13 21:45:05,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:45:05,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604387730] [2025-03-13 21:45:05,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604387730] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:45:05,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:45:05,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-13 21:45:05,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169725227] [2025-03-13 21:45:05,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:45:05,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:45:05,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:45:05,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:45:05,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:45:05,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:45:05,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 468 transitions, 9262 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:45:05,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:45:05,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:45:05,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:45:06,232 INFO L124 PetriNetUnfolderBase]: 4375/8044 cut-off events. [2025-03-13 21:45:06,233 INFO L125 PetriNetUnfolderBase]: For 129065/129299 co-relation queries the response was YES. [2025-03-13 21:45:06,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61504 conditions, 8044 events. 4375/8044 cut-off events. For 129065/129299 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 61598 event pairs, 251 based on Foata normal form. 35/8079 useless extension candidates. Maximal degree in co-relation 61426. Up to 2212 conditions per place. [2025-03-13 21:45:06,300 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 440 selfloop transitions, 108 changer transitions 73/628 dead transitions. [2025-03-13 21:45:06,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 628 transitions, 13284 flow [2025-03-13 21:45:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:45:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:45:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2025-03-13 21:45:06,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-03-13 21:45:06,301 INFO L175 Difference]: Start difference. First operand has 275 places, 468 transitions, 9262 flow. Second operand 9 states and 126 transitions. [2025-03-13 21:45:06,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 628 transitions, 13284 flow [2025-03-13 21:45:06,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 628 transitions, 13138 flow, removed 27 selfloop flow, removed 17 redundant places. [2025-03-13 21:45:06,940 INFO L231 Difference]: Finished difference. Result has 263 places, 461 transitions, 9169 flow [2025-03-13 21:45:06,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=9120, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9169, PETRI_PLACES=263, PETRI_TRANSITIONS=461} [2025-03-13 21:45:06,940 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2025-03-13 21:45:06,940 INFO L471 AbstractCegarLoop]: Abstraction has has 263 places, 461 transitions, 9169 flow [2025-03-13 21:45:06,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 21:45:06,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:45:06,941 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:45:06,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2025-03-13 21:45:06,941 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:45:06,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:45:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash -956504420, now seen corresponding path program 7 times [2025-03-13 21:45:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:45:06,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276775] [2025-03-13 21:45:06,941 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:45:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:45:06,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:45:06,948 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:45:06,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:45:06,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:45:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:45:07,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:45:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276775] [2025-03-13 21:45:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276775] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:45:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231332036] [2025-03-13 21:45:07,069 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:45:07,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:45:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:45:07,071 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:45:07,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-13 21:45:07,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:45:07,155 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:45:07,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:45:07,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:45:07,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-13 21:45:07,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:45:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:45:07,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:45:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:45:08,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231332036] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:45:08,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:45:08,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2025-03-13 21:45:08,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415557110] [2025-03-13 21:45:08,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:45:08,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-13 21:45:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:45:08,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-13 21:45:08,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2025-03-13 21:45:08,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 34 [2025-03-13 21:45:08,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 461 transitions, 9169 flow. Second operand has 32 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 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 21:45:08,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:45:08,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 34 [2025-03-13 21:45:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:45:10,106 INFO L124 PetriNetUnfolderBase]: 4124/7533 cut-off events. [2025-03-13 21:45:10,106 INFO L125 PetriNetUnfolderBase]: For 120285/120480 co-relation queries the response was YES. [2025-03-13 21:45:10,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56942 conditions, 7533 events. 4124/7533 cut-off events. For 120285/120480 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 56226 event pairs, 672 based on Foata normal form. 14/7547 useless extension candidates. Maximal degree in co-relation 56866. Up to 2230 conditions per place. [2025-03-13 21:45:10,176 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 599 selfloop transitions, 107 changer transitions 102/815 dead transitions. [2025-03-13 21:45:10,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 815 transitions, 15806 flow [2025-03-13 21:45:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-13 21:45:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-13 21:45:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 346 transitions. [2025-03-13 21:45:10,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3634453781512605 [2025-03-13 21:45:10,177 INFO L175 Difference]: Start difference. First operand has 263 places, 461 transitions, 9169 flow. Second operand 28 states and 346 transitions. [2025-03-13 21:45:10,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 815 transitions, 15806 flow [2025-03-13 21:45:10,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 815 transitions, 15472 flow, removed 13 selfloop flow, removed 10 redundant places. [2025-03-13 21:45:10,793 INFO L231 Difference]: Finished difference. Result has 288 places, 410 transitions, 7929 flow [2025-03-13 21:45:10,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8864, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7929, PETRI_PLACES=288, PETRI_TRANSITIONS=410} [2025-03-13 21:45:10,794 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2025-03-13 21:45:10,794 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 410 transitions, 7929 flow [2025-03-13 21:45:10,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 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 21:45:10,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:45:10,794 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:45:10,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0