./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_safe-7.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 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:10:44,918 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:10:44,969 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:10:44,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:10:44,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:10:44,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:10:44,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:10:44,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:10:44,993 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:10:44,993 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:10:44,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:10:44,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:10:44,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:10:44,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:10:44,994 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:10:44,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:10:44,995 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:10:44,996 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:10:44,996 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:10:44,996 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:10:44,996 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:10:44,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:10:44,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:10:44,996 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:10:44,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:10:44,997 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 -> 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 [2025-03-08 17:10:45,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:10:45,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:10:45,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:10:45,242 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:10:45,242 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:10:45,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-7.i [2025-03-08 17:10:46,415 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef0f4cb5/d93f3bc1235b4ceda6bdf9d2c5d9f253/FLAG535a7079d [2025-03-08 17:10:46,712 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:10:46,713 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-7.i [2025-03-08 17:10:46,725 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef0f4cb5/d93f3bc1235b4ceda6bdf9d2c5d9f253/FLAG535a7079d [2025-03-08 17:10:46,986 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef0f4cb5/d93f3bc1235b4ceda6bdf9d2c5d9f253 [2025-03-08 17:10:46,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:10:46,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:10:46,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:10:46,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:10:46,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:10:46,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:10:46" (1/1) ... [2025-03-08 17:10:46,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b428c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:46, skipping insertion in model container [2025-03-08 17:10:46,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:10:46" (1/1) ... [2025-03-08 17:10:47,017 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:10:47,242 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_safe-7.i[30241,30254] [2025-03-08 17:10:47,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:10:47,271 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:10:47,301 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_safe-7.i[30241,30254] [2025-03-08 17:10:47,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:10:47,330 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:10:47,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47 WrapperNode [2025-03-08 17:10:47,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:10:47,333 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:10:47,333 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:10:47,333 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:10:47,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,352 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,367 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-08 17:10:47,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:10:47,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:10:47,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:10:47,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:10:47,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,376 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,388 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]. [2025-03-08 17:10:47,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,390 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,391 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:10:47,394 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:10:47,394 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:10:47,394 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:10:47,395 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (1/1) ... [2025-03-08 17:10:47,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:10:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:47,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:10:47,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:10:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-08 17:10:47,441 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-08 17:10:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-08 17:10:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-08 17:10:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:10:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:10:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:10:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:10:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:10:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:10:47,443 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:10:47,534 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:10:47,535 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:10:47,657 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:10:47,657 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:10:47,724 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:10:47,724 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:10:47,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:10:47 BoogieIcfgContainer [2025-03-08 17:10:47,725 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:10:47,726 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:10:47,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:10:47,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:10:47,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:10:46" (1/3) ... [2025-03-08 17:10:47,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278d2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:10:47, skipping insertion in model container [2025-03-08 17:10:47,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:10:47" (2/3) ... [2025-03-08 17:10:47,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278d2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:10:47, skipping insertion in model container [2025-03-08 17:10:47,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:10:47" (3/3) ... [2025-03-08 17:10:47,734 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2025-03-08 17:10:47,747 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:10:47,748 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-7.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:10:47,749 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:10:47,786 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:10:47,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-08 17:10:47,832 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-08 17:10:47,834 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:10:47,836 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. [2025-03-08 17:10:47,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-08 17:10:47,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-08 17:10:47,842 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:10:47,855 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;@492097c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:10:47,855 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:10:47,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:10:47,864 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-08 17:10:47,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:10:47,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:47,865 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:47,865 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:47,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash -412560026, now seen corresponding path program 1 times [2025-03-08 17:10:47,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:47,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730332752] [2025-03-08 17:10:47,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:10:47,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:47,929 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 17:10:47,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:10:47,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:10:47,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:48,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730332752] [2025-03-08 17:10:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730332752] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:10:48,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:10:48,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:10:48,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671855588] [2025-03-08 17:10:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:10:48,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:10:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:48,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:10:48,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:10:48,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:10:48,097 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) [2025-03-08 17:10:48,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:48,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:10:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:10:48,236 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-08 17:10:48,237 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-08 17:10:48,238 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. [2025-03-08 17:10:48,243 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-08 17:10:48,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-08 17:10:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:10:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:10:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-08 17:10:48,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-08 17:10:48,256 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-08 17:10:48,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-08 17:10:48,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:10:48,264 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-08 17:10:48,266 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} [2025-03-08 17:10:48,268 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-08 17:10:48,269 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-08 17:10:48,270 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) [2025-03-08 17:10:48,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:48,270 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:48,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:10:48,271 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:48,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 103279624, now seen corresponding path program 1 times [2025-03-08 17:10:48,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:48,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839848933] [2025-03-08 17:10:48,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:10:48,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:48,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:10:48,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:10:48,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:10:48,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:48,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:48,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839848933] [2025-03-08 17:10:48,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839848933] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:10:48,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284201657] [2025-03-08 17:10:48,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:10:48,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:10:48,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:48,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:10:48,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:10:48,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:10:48,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:10:48,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:10:48,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:48,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-08 17:10:48,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:10:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:48,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:10:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:48,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284201657] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:10:48,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:10:48,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 17:10:48,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144092909] [2025-03-08 17:10:48,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:10:48,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:10:48,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:48,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:10:48,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:10:48,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:10:48,480 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) [2025-03-08 17:10:48,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:48,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:10:48,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:10:48,626 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-08 17:10:48,626 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:10:48,627 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. [2025-03-08 17:10:48,630 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-08 17:10:48,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-08 17:10:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:10:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:10:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-08 17:10:48,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-08 17:10:48,631 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-08 17:10:48,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-08 17:10:48,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:10:48,634 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-08 17:10:48,635 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} [2025-03-08 17:10:48,635 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-08 17:10:48,635 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-08 17:10:48,635 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) [2025-03-08 17:10:48,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:48,636 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:48,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:10:48,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:10:48,840 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:48,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash 701132262, now seen corresponding path program 2 times [2025-03-08 17:10:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:48,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157210211] [2025-03-08 17:10:48,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:10:48,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:48,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:10:48,873 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:10:48,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:10:48,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:48,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:48,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157210211] [2025-03-08 17:10:48,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157210211] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:10:48,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492610782] [2025-03-08 17:10:48,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:10:48,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:10:48,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:48,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:10:48,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:10:49,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:10:49,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:10:49,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:10:49,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:49,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:10:49,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:10:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:49,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:10:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492610782] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:10:49,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:10:49,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-08 17:10:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630602480] [2025-03-08 17:10:49,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:10:49,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:10:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:49,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:10:49,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:10:49,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:10:49,126 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) [2025-03-08 17:10:49,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:49,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:10:49,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:10:49,344 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-08 17:10:49,344 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-08 17:10:49,346 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. [2025-03-08 17:10:49,349 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-08 17:10:49,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-08 17:10:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:10:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:10:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-08 17:10:49,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-08 17:10:49,351 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-08 17:10:49,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-08 17:10:49,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-08 17:10:49,355 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-08 17:10:49,356 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} [2025-03-08 17:10:49,357 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-08 17:10:49,357 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-08 17:10:49,357 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) [2025-03-08 17:10:49,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:49,357 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:49,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:10:49,558 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 [2025-03-08 17:10:49,558 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:49,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:49,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1268144806, now seen corresponding path program 3 times [2025-03-08 17:10:49,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:49,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532819486] [2025-03-08 17:10:49,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:10:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:49,566 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-08 17:10:49,595 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:10:49,595 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 17:10:49,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532819486] [2025-03-08 17:10:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532819486] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:10:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627329542] [2025-03-08 17:10:49,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:10:49,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:10:49,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:49,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:10:49,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:10:49,835 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-08 17:10:49,856 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:10:49,856 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 17:10:49,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:49,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:10:49,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:10:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:49,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:10:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:50,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627329542] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:10:50,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:10:50,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-03-08 17:10:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183703697] [2025-03-08 17:10:50,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:10:50,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:10:50,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:50,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:10:50,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:10:50,055 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-08 17:10:50,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 19 states, 19 states have (on average 8.578947368421053) internal successors, (163), 19 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:10:50,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:50,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-08 17:10:50,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:10:50,369 INFO L124 PetriNetUnfolderBase]: 681/1082 cut-off events. [2025-03-08 17:10:50,369 INFO L125 PetriNetUnfolderBase]: For 4012/4012 co-relation queries the response was YES. [2025-03-08 17:10:50,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3161 conditions, 1082 events. 681/1082 cut-off events. For 4012/4012 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3921 event pairs, 39 based on Foata normal form. 96/1157 useless extension candidates. Maximal degree in co-relation 3133. Up to 241 conditions per place. [2025-03-08 17:10:50,377 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 147 selfloop transitions, 17 changer transitions 0/169 dead transitions. [2025-03-08 17:10:50,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 169 transitions, 802 flow [2025-03-08 17:10:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:10:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:10:50,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 296 transitions. [2025-03-08 17:10:50,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5670498084291188 [2025-03-08 17:10:50,379 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 18 states and 296 transitions. [2025-03-08 17:10:50,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 169 transitions, 802 flow [2025-03-08 17:10:50,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 169 transitions, 742 flow, removed 25 selfloop flow, removed 5 redundant places. [2025-03-08 17:10:50,387 INFO L231 Difference]: Finished difference. Result has 71 places, 41 transitions, 218 flow [2025-03-08 17:10:50,387 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=18, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=41} [2025-03-08 17:10:50,388 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2025-03-08 17:10:50,388 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 41 transitions, 218 flow [2025-03-08 17:10:50,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.578947368421053) internal successors, (163), 19 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:10:50,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:10:50,388 INFO L206 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:10:50,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:10:50,593 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 [2025-03-08 17:10:50,593 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:10:50,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:10:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1804748954, now seen corresponding path program 4 times [2025-03-08 17:10:50,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:10:50,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886048845] [2025-03-08 17:10:50,596 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:10:50,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:10:50,606 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:10:50,634 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:10:50,634 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:10:50,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:51,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:10:51,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886048845] [2025-03-08 17:10:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886048845] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:10:51,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203467772] [2025-03-08 17:10:51,730 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:10:51,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:10:51,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:10:51,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:10:51,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:10:51,774 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-08 17:10:51,799 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:10:51,799 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:10:51,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:10:51,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-08 17:10:51,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:10:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:52,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:10:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:10:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203467772] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:10:53,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:10:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2025-03-08 17:10:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508610897] [2025-03-08 17:10:53,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:10:53,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-03-08 17:10:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:10:53,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-03-08 17:10:53,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=3943, Unknown=0, NotChecked=0, Total=4556 [2025-03-08 17:10:53,893 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-08 17:10:53,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 41 transitions, 218 flow. Second operand has 68 states, 68 states have (on average 6.235294117647059) internal successors, (424), 68 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:10:53,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:10:53,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-08 17:10:53,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:11:11,488 INFO L124 PetriNetUnfolderBase]: 19201/31187 cut-off events. [2025-03-08 17:11:11,488 INFO L125 PetriNetUnfolderBase]: For 70323/70323 co-relation queries the response was YES. [2025-03-08 17:11:11,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85060 conditions, 31187 events. 19201/31187 cut-off events. For 70323/70323 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 202804 event pairs, 70 based on Foata normal form. 0/30817 useless extension candidates. Maximal degree in co-relation 85026. Up to 4023 conditions per place. [2025-03-08 17:11:11,645 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 655 selfloop transitions, 731 changer transitions 789/2178 dead transitions. [2025-03-08 17:11:11,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 2178 transitions, 13497 flow [2025-03-08 17:11:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2025-03-08 17:11:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2025-03-08 17:11:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 2657 transitions. [2025-03-08 17:11:11,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46040547565413276 [2025-03-08 17:11:11,655 INFO L175 Difference]: Start difference. First operand has 71 places, 41 transitions, 218 flow. Second operand 199 states and 2657 transitions. [2025-03-08 17:11:11,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 2178 transitions, 13497 flow [2025-03-08 17:11:11,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 2178 transitions, 11315 flow, removed 722 selfloop flow, removed 11 redundant places. [2025-03-08 17:11:11,807 INFO L231 Difference]: Finished difference. Result has 336 places, 834 transitions, 5040 flow [2025-03-08 17:11:11,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=199, PETRI_FLOW=5040, PETRI_PLACES=336, PETRI_TRANSITIONS=834} [2025-03-08 17:11:11,808 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2025-03-08 17:11:11,808 INFO L471 AbstractCegarLoop]: Abstraction has has 336 places, 834 transitions, 5040 flow [2025-03-08 17:11:11,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.235294117647059) internal successors, (424), 68 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:11:11,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:11:11,809 INFO L206 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:11:11,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:11:12,013 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 [2025-03-08 17:11:12,013 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:11:12,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:11:12,014 INFO L85 PathProgramCache]: Analyzing trace with hash -287952604, now seen corresponding path program 1 times [2025-03-08 17:11:12,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:11:12,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004337849] [2025-03-08 17:11:12,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:11:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:11:12,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 17:11:12,030 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:11:12,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:11:12,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:11:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004337849] [2025-03-08 17:11:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004337849] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:11:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200768889] [2025-03-08 17:11:12,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:11:12,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:11:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:11:12,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:11:12,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:11:12,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 17:11:13,018 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:11:13,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:11:13,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:11:13,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-08 17:11:13,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:11:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:13,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:11:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:11:14,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200768889] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:11:14,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:11:14,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2025-03-08 17:11:14,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940152904] [2025-03-08 17:11:14,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:11:14,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-08 17:11:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:11:14,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-08 17:11:14,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=4582, Unknown=0, NotChecked=0, Total=5256 [2025-03-08 17:11:14,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-08 17:11:14,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 834 transitions, 5040 flow. Second operand has 73 states, 73 states have (on average 6.301369863013699) internal successors, (460), 73 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:11:14,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:11:14,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-08 17:11:14,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand