./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_unsafe-12.i -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 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 00:42:44,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 00:42:44,887 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 00:42:44,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 00:42:44,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 00:42:44,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 00:42:44,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 00:42:44,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 00:42:44,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 00:42:44,910 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 00:42:44,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 00:42:44,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 00:42:44,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 00:42:44,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 00:42:44,911 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 00:42:44,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:42:44,912 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 00:42:44,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 00:42:44,912 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 -> 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c [2025-03-14 00:42:45,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 00:42:45,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 00:42:45,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 00:42:45,169 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 00:42:45,170 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 00:42:45,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-03-14 00:42:46,362 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9a74c6a3/fb20b65700e84130931df3cb8e0a2fa6/FLAG159fc2da6 [2025-03-14 00:42:46,617 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 00:42:46,618 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-03-14 00:42:46,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9a74c6a3/fb20b65700e84130931df3cb8e0a2fa6/FLAG159fc2da6 [2025-03-14 00:42:46,641 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9a74c6a3/fb20b65700e84130931df3cb8e0a2fa6 [2025-03-14 00:42:46,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 00:42:46,643 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 00:42:46,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 00:42:46,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 00:42:46,647 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 00:42:46,647 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d840e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46, skipping insertion in model container [2025-03-14 00:42:46,648 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,675 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 00:42:46,884 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/pthread/fib_unsafe-12.i[30243,30256] [2025-03-14 00:42:46,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:42:46,914 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 00:42:46,947 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/pthread/fib_unsafe-12.i[30243,30256] [2025-03-14 00:42:46,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:42:46,977 INFO L204 MainTranslator]: Completed translation [2025-03-14 00:42:46,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46 WrapperNode [2025-03-14 00:42:46,979 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 00:42:46,980 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 00:42:46,980 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 00:42:46,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 00:42:46,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,012 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-14 00:42:47,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 00:42:47,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 00:42:47,013 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 00:42:47,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 00:42:47,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,036 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-14 00:42:47,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,041 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,045 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,048 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 00:42:47,048 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 00:42:47,048 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 00:42:47,048 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 00:42:47,053 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:47,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:42:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:47,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-14 00:42:47,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-14 00:42:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-14 00:42:47,100 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-14 00:42:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-14 00:42:47,100 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-14 00:42:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 00:42:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 00:42:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 00:42:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 00:42:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 00:42:47,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 00:42:47,102 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 00:42:47,201 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 00:42:47,202 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 00:42:47,334 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 00:42:47,335 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 00:42:47,335 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 00:42:47,433 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 00:42:47,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:42:47 BoogieIcfgContainer [2025-03-14 00:42:47,434 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 00:42:47,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 00:42:47,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 00:42:47,439 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 00:42:47,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 12:42:46" (1/3) ... [2025-03-14 00:42:47,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f213bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:42:47, skipping insertion in model container [2025-03-14 00:42:47,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46" (2/3) ... [2025-03-14 00:42:47,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f213bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:42:47, skipping insertion in model container [2025-03-14 00:42:47,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:42:47" (3/3) ... [2025-03-14 00:42:47,441 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2025-03-14 00:42:47,454 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 00:42:47,456 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-12.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-14 00:42:47,456 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 00:42:47,491 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-14 00:42:47,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-14 00:42:47,539 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-14 00:42:47,543 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:42:47,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-14 00:42:47,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-14 00:42:47,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-14 00:42:47,557 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 00:42:47,570 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;@21faf9c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 00:42:47,570 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-14 00:42:47,581 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 00:42:47,582 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-14 00:42:47,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:42:47,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:47,583 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:47,583 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:47,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -411636505, now seen corresponding path program 1 times [2025-03-14 00:42:47,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:47,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224085425] [2025-03-14 00:42:47,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:47,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:47,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-14 00:42:47,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-14 00:42:47,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:47,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:47,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:47,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224085425] [2025-03-14 00:42:47,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224085425] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:42:47,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:42:47,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 00:42:47,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982013758] [2025-03-14 00:42:47,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:42:47,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 00:42:47,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:47,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 00:42:47,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 00:42:47,823 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:47,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 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) [2025-03-14 00:42:47,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:47,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:47,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:47,964 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-14 00:42:47,965 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-14 00:42:47,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 410 events. 233/410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1576 event pairs, 39 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 765. Up to 257 conditions per place. [2025-03-14 00:42:47,969 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-14 00:42:47,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-14 00:42:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 00:42:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 00:42:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-14 00:42:47,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-14 00:42:47,982 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-14 00:42:47,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-14 00:42:47,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-14 00:42:47,987 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-14 00:42:47,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-03-14 00:42:47,993 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-14 00:42:47,993 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-14 00:42:47,994 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) [2025-03-14 00:42:47,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:47,994 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:47,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 00:42:47,994 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:47,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash 75573994, now seen corresponding path program 1 times [2025-03-14 00:42:47,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:47,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780476467] [2025-03-14 00:42:47,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:48,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:42:48,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:42:48,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:48,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780476467] [2025-03-14 00:42:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780476467] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374479001] [2025-03-14 00:42:48,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:48,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:48,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:48,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 00:42:48,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:42:48,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:42:48,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:48,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-14 00:42:48,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374479001] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:48,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:48,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-14 00:42:48,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154509601] [2025-03-14 00:42:48,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:48,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 00:42:48,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:48,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 00:42:48,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-14 00:42:48,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:48,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:42:48,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:48,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:48,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:48,383 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-14 00:42:48,384 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-14 00:42:48,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 506 events. 297/506 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1880 event pairs, 39 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1069. Up to 209 conditions per place. [2025-03-14 00:42:48,388 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-14 00:42:48,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-14 00:42:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 00:42:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 00:42:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-14 00:42:48,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-14 00:42:48,391 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-14 00:42:48,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-14 00:42:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 00:42:48,392 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-14 00:42:48,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-03-14 00:42:48,393 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-14 00:42:48,393 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-14 00:42:48,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:42:48,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:48,394 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:48,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:48,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,595 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:48,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -149432921, now seen corresponding path program 2 times [2025-03-14 00:42:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:48,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998928383] [2025-03-14 00:42:48,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:42:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:48,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-14 00:42:48,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-14 00:42:48,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:42:48,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998928383] [2025-03-14 00:42:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998928383] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:48,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115253183] [2025-03-14 00:42:48,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:42:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:48,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:48,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 00:42:48,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-14 00:42:48,736 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-14 00:42:48,736 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:42:48,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 00:42:48,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115253183] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:48,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:48,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-14 00:42:48,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138144072] [2025-03-14 00:42:48,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:48,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-14 00:42:48,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:48,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-14 00:42:48,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-14 00:42:48,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:48,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:42:48,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:48,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:48,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:48,989 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-14 00:42:48,989 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-14 00:42:48,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 794 events. 489/794 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2900 event pairs, 39 based on Foata normal form. 96/869 useless extension candidates. Maximal degree in co-relation 1997. Up to 209 conditions per place. [2025-03-14 00:42:48,995 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-14 00:42:48,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-14 00:42:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 00:42:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 00:42:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-14 00:42:48,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-14 00:42:48,997 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-14 00:42:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-14 00:42:48,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-14 00:42:49,001 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-14 00:42:49,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2025-03-14 00:42:49,001 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-14 00:42:49,001 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-14 00:42:49,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:42:49,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:49,002 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:49,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:49,202 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,SelfDestructingSolverStorable2 [2025-03-14 00:42:49,203 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:49,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:49,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1573371591, now seen corresponding path program 3 times [2025-03-14 00:42:49,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:49,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101214387] [2025-03-14 00:42:49,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:42:49,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:49,209 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-14 00:42:49,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:42:49,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-14 00:42:49,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101214387] [2025-03-14 00:42:49,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101214387] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:49,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101578687] [2025-03-14 00:42:49,401 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:42:49,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:49,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:49,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:49,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 00:42:49,440 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-14 00:42:49,464 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:42:49,464 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-14 00:42:49,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:49,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 00:42:49,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101578687] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:49,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:49,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-14 00:42:49,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367167210] [2025-03-14 00:42:49,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:49,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-14 00:42:49,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:49,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-14 00:42:49,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-14 00:42:49,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:49,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 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) [2025-03-14 00:42:49,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:49,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:49,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:50,039 INFO L124 PetriNetUnfolderBase]: 873/1370 cut-off events. [2025-03-14 00:42:50,039 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-14 00:42:50,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 1370 events. 873/1370 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4946 event pairs, 39 based on Foata normal form. 192/1541 useless extension candidates. Maximal degree in co-relation 3997. Up to 337 conditions per place. [2025-03-14 00:42:50,047 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-03-14 00:42:50,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-03-14 00:42:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-14 00:42:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-14 00:42:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-03-14 00:42:50,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-03-14 00:42:50,050 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-03-14 00:42:50,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-03-14 00:42:50,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-14 00:42:50,058 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-03-14 00:42:50,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2025-03-14 00:42:50,059 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-14 00:42:50,059 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-03-14 00:42:50,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 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) [2025-03-14 00:42:50,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:50,059 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:50,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:50,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:50,260 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:50,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash -681080569, now seen corresponding path program 4 times [2025-03-14 00:42:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756097139] [2025-03-14 00:42:50,261 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 00:42:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:50,269 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-14 00:42:50,285 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-14 00:42:50,286 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 00:42:50,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:50,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756097139] [2025-03-14 00:42:50,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756097139] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:50,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362815356] [2025-03-14 00:42:50,676 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 00:42:50,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:50,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:50,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:50,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 00:42:50,722 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-14 00:42:50,750 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-14 00:42:50,750 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 00:42:50,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:50,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-14 00:42:50,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:50,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362815356] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:51,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-03-14 00:42:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069581054] [2025-03-14 00:42:51,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:51,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-14 00:42:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:51,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-14 00:42:51,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2025-03-14 00:42:51,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:51,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:42:51,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:51,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:51,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:51,506 INFO L124 PetriNetUnfolderBase]: 1001/1562 cut-off events. [2025-03-14 00:42:51,506 INFO L125 PetriNetUnfolderBase]: For 16588/16588 co-relation queries the response was YES. [2025-03-14 00:42:51,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 1562 events. 1001/1562 cut-off events. For 16588/16588 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5694 event pairs, 39 based on Foata normal form. 64/1605 useless extension candidates. Maximal degree in co-relation 4765. Up to 305 conditions per place. [2025-03-14 00:42:51,517 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 227 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2025-03-14 00:42:51,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 259 transitions, 1246 flow [2025-03-14 00:42:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-14 00:42:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-14 00:42:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 454 transitions. [2025-03-14 00:42:51,519 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5591133004926109 [2025-03-14 00:42:51,519 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 28 states and 454 transitions. [2025-03-14 00:42:51,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 259 transitions, 1246 flow [2025-03-14 00:42:51,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 259 transitions, 1142 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-03-14 00:42:51,553 INFO L231 Difference]: Finished difference. Result has 103 places, 51 transitions, 290 flow [2025-03-14 00:42:51,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=51} [2025-03-14 00:42:51,554 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2025-03-14 00:42:51,554 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 51 transitions, 290 flow [2025-03-14 00:42:51,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:42:51,554 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:51,554 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:51,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:51,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:51,755 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:51,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash 119366087, now seen corresponding path program 5 times [2025-03-14 00:42:51,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:51,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310961601] [2025-03-14 00:42:51,756 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 00:42:51,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:51,763 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-14 00:42:51,844 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 00:42:51,847 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-14 00:42:51,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:53,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310961601] [2025-03-14 00:42:53,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310961601] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141779118] [2025-03-14 00:42:53,349 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 00:42:53,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:53,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:53,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 00:42:53,385 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-14 00:42:53,415 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 00:42:53,415 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-14 00:42:53,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:53,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-03-14 00:42:53,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:54,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:56,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141779118] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:56,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:56,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2025-03-14 00:42:56,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505137016] [2025-03-14 00:42:56,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:56,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2025-03-14 00:42:56,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:56,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2025-03-14 00:42:56,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=8164, Unknown=0, NotChecked=0, Total=9506 [2025-03-14 00:42:56,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-14 00:42:56,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 51 transitions, 290 flow. Second operand has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:42:56,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:56,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-14 00:42:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:43:37,908 INFO L124 PetriNetUnfolderBase]: 41560/67200 cut-off events. [2025-03-14 00:43:37,908 INFO L125 PetriNetUnfolderBase]: For 240492/240492 co-relation queries the response was YES. [2025-03-14 00:43:38,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183567 conditions, 67200 events. 41560/67200 cut-off events. For 240492/240492 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 456429 event pairs, 679 based on Foata normal form. 0/66620 useless extension candidates. Maximal degree in co-relation 183523. Up to 8745 conditions per place. [2025-03-14 00:43:38,392 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 809 selfloop transitions, 1594 changer transitions 1229/3635 dead transitions. [2025-03-14 00:43:38,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 3635 transitions, 24855 flow [2025-03-14 00:43:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2025-03-14 00:43:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2025-03-14 00:43:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 3516 transitions. [2025-03-14 00:43:38,400 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4699278267842823 [2025-03-14 00:43:38,400 INFO L175 Difference]: Start difference. First operand has 103 places, 51 transitions, 290 flow. Second operand 258 states and 3516 transitions. [2025-03-14 00:43:38,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 3635 transitions, 24855 flow [2025-03-14 00:43:38,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 3635 transitions, 20833 flow, removed 754 selfloop flow, removed 23 redundant places. [2025-03-14 00:43:39,019 INFO L231 Difference]: Finished difference. Result has 455 places, 1744 transitions, 10756 flow [2025-03-14 00:43:39,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=258, PETRI_FLOW=10756, PETRI_PLACES=455, PETRI_TRANSITIONS=1744} [2025-03-14 00:43:39,022 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2025-03-14 00:43:39,022 INFO L471 AbstractCegarLoop]: Abstraction has has 455 places, 1744 transitions, 10756 flow [2025-03-14 00:43:39,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:43:39,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:43:39,024 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:43:39,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-14 00:43:39,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:43:39,224 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:43:39,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:43:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash -62438523, now seen corresponding path program 1 times [2025-03-14 00:43:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:43:39,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903882765] [2025-03-14 00:43:39,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:43:39,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:43:39,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-14 00:43:39,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-14 00:43:39,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:43:39,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:43:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:40,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:43:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903882765] [2025-03-14 00:43:40,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903882765] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:43:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269312679] [2025-03-14 00:43:40,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:43:40,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:43:40,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:43:40,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:43:40,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 00:43:40,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-14 00:43:40,750 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-14 00:43:40,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:43:40,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:43:40,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-03-14 00:43:40,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:43:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:42,194 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:43:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:43,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269312679] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:43:43,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:43:43,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2025-03-14 00:43:43,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475159610] [2025-03-14 00:43:43,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:43:43,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2025-03-14 00:43:43,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:43:43,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2025-03-14 00:43:43,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=9278, Unknown=0, NotChecked=0, Total=10712 [2025-03-14 00:43:43,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-14 00:43:43,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1744 transitions, 10756 flow. Second operand has 104 states, 104 states have (on average 6.211538461538462) internal successors, (646), 104 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:43:43,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:43:43,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-14 00:43:43,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand