/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:10:59,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:10:59,181 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 19:10:59,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:10:59,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:10:59,200 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:10:59,200 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:10:59,201 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:10:59,202 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:10:59,202 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:10:59,202 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:10:59,202 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:10:59,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:10:59,203 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,203 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:10:59,203 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,204 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 19:10:59,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:10:59,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:10:59,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:10:59,445 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:10:59,447 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:10:59,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i [2025-04-13 19:11:00,782 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38bf73644/78367c5573ac43d7858951b3f733cc23/FLAG7911d6951 [2025-04-13 19:11:00,999 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:11:00,999 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i [2025-04-13 19:11:01,009 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38bf73644/78367c5573ac43d7858951b3f733cc23/FLAG7911d6951 [2025-04-13 19:11:01,782 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38bf73644/78367c5573ac43d7858951b3f733cc23 [2025-04-13 19:11:01,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:11:01,785 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:11:01,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:01,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:11:01,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:11:01,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c78a3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:01, skipping insertion in model container [2025-04-13 19:11:01,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,809 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:11:02,053 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i[30243,30256] [2025-04-13 19:11:02,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,077 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:11:02,123 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i[30243,30256] [2025-04-13 19:11:02,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,155 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:11:02,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02 WrapperNode [2025-04-13 19:11:02,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:02,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:11:02,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:11:02,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,194 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 19:11:02,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:11:02,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:11:02,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,215 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]. [2025-04-13 19:11:02,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,218 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,225 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:11:02,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:11:02,225 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:11:02,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (1/1) ... [2025-04-13 19:11:02,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:11:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:02,247 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) [2025-04-13 19:11:02,249 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 [2025-04-13 19:11:02,265 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 19:11:02,265 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 19:11:02,265 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 19:11:02,266 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 19:11:02,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:11:02,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:11:02,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:11:02,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:11:02,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:11:02,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:11:02,267 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:11:02,362 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:11:02,363 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:11:02,479 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:11:02,480 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:11:02,480 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:11:02,580 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:02,582 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:02,585 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:11:02,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:02 BoogieIcfgContainer [2025-04-13 19:11:02,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:11:02,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:11:02,587 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:11:02,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:11:02,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:11:01" (1/3) ... [2025-04-13 19:11:02,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1708e24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:11:02, skipping insertion in model container [2025-04-13 19:11:02,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02" (2/3) ... [2025-04-13 19:11:02,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1708e24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:11:02, skipping insertion in model container [2025-04-13 19:11:02,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:02" (3/3) ... [2025-04-13 19:11:02,594 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2025-04-13 19:11:02,603 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:11:02,604 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-12.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 19:11:02,605 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:11:02,637 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:11:02,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:02,684 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 19:11:02,685 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:02,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 23 events. 5/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2025-04-13 19:11:02,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:02,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 19:11:02,701 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:11:02,712 INFO L340 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;@3b061450, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:11:02,712 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 19:11:02,724 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:11:02,725 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 19:11:02,725 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:02,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:02,725 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:02,725 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:02,729 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1561770242, now seen corresponding path program 1 times [2025-04-13 19:11:02,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:02,737 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081198178] [2025-04-13 19:11:02,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:02,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:02,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 19:11:02,812 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 19:11:02,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:02,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:02,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:02,917 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081198178] [2025-04-13 19:11:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081198178] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:11:02,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:11:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:11:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101885344] [2025-04-13 19:11:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:11:02,922 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:11:02,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:02,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:11:02,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:11:02,943 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:02,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:02,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:02,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:02,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,039 INFO L116 PetriNetUnfolderBase]: 115/193 cut-off events. [2025-04-13 19:11:03,039 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:11:03,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 193 events. 115/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 564 event pairs, 20 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 368. Up to 118 conditions per place. [2025-04-13 19:11:03,041 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 20 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2025-04-13 19:11:03,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:03,043 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:11:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:11:03,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-04-13 19:11:03,051 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2025-04-13 19:11:03,052 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 49 transitions. [2025-04-13 19:11:03,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 19:11:03,059 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:03,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2025-04-13 19:11:03,064 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 19:11:03,064 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:03,064 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:03,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,064 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,065 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:11:03,065 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:03,065 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1170211856, now seen corresponding path program 1 times [2025-04-13 19:11:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,066 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416783620] [2025-04-13 19:11:03,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:03,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:03,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:03,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,178 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416783620] [2025-04-13 19:11:03,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416783620] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:03,178 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814212678] [2025-04-13 19:11:03,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:03,183 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) [2025-04-13 19:11:03,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 19:11:03,226 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:03,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:03,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:11:03,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:03,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:03,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814212678] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:03,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:03,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 19:11:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359909701] [2025-04-13 19:11:03,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,283 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:11:03,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:11:03,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:11:03,284 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:03,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 56 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:03,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:03,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,389 INFO L116 PetriNetUnfolderBase]: 151/247 cut-off events. [2025-04-13 19:11:03,389 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:03,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 247 events. 151/247 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 714 event pairs, 20 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 539. Up to 91 conditions per place. [2025-04-13 19:11:03,391 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 38 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2025-04-13 19:11:03,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:03,392 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:11:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:11:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2025-04-13 19:11:03,393 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2025-04-13 19:11:03,393 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 88 transitions. [2025-04-13 19:11:03,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:03,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:03,394 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:03,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2025-04-13 19:11:03,395 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 19:11:03,395 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:03,395 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:03,395 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,395 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 19:11:03,595 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,596 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:03,596 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 493351806, now seen corresponding path program 2 times [2025-04-13 19:11:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,596 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770065993] [2025-04-13 19:11:03,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:03,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,605 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:03,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:03,625 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:03,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:03,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,712 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770065993] [2025-04-13 19:11:03,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770065993] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:03,713 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320837764] [2025-04-13 19:11:03,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:03,714 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) [2025-04-13 19:11:03,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 19:11:03,756 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:03,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:03,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:03,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:11:03,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:03,796 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:03,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320837764] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:03,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:03,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 19:11:03,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708704576] [2025-04-13 19:11:03,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,849 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:11:03,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:11:03,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:11:03,850 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:03,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 90 flow. Second operand has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:03,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:03,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:04,009 INFO L116 PetriNetUnfolderBase]: 259/409 cut-off events. [2025-04-13 19:11:04,009 INFO L117 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2025-04-13 19:11:04,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 409 events. 259/409 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1224 event pairs, 20 based on Foata normal form. 54/373 useless extension candidates. Maximal degree in co-relation 1061. Up to 109 conditions per place. [2025-04-13 19:11:04,015 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 74 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2025-04-13 19:11:04,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:04,015 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:11:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:11:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2025-04-13 19:11:04,018 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-04-13 19:11:04,018 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 175 transitions. [2025-04-13 19:11:04,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:04,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 90 transitions, 402 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:04,023 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:04,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2025-04-13 19:11:04,024 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 19:11:04,024 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:04,024 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:04,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:04,024 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:04,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-13 19:11:04,225 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-13 19:11:04,225 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:04,226 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1439646146, now seen corresponding path program 3 times [2025-04-13 19:11:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:04,226 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331584222] [2025-04-13 19:11:04,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:04,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:04,261 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:04,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:04,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:04,425 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331584222] [2025-04-13 19:11:04,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331584222] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:04,425 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632053236] [2025-04-13 19:11:04,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:04,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:04,427 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) [2025-04-13 19:11:04,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 19:11:04,462 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:04,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:04,480 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:04,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 19:11:04,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632053236] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:04,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:04,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-04-13 19:11:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049991118] [2025-04-13 19:11:04,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:04,683 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 19:11:04,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:04,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 19:11:04,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-04-13 19:11:04,684 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:04,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 25 states, 25 states have (on average 8.28) internal successors, (207), 25 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:04,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:04,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:04,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:04,944 INFO L116 PetriNetUnfolderBase]: 475/733 cut-off events. [2025-04-13 19:11:04,944 INFO L117 PetriNetUnfolderBase]: For 4194/4194 co-relation queries the response was YES. [2025-04-13 19:11:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2212 conditions, 733 events. 475/733 cut-off events. For 4194/4194 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2249 event pairs, 20 based on Foata normal form. 108/679 useless extension candidates. Maximal degree in co-relation 2186. Up to 190 conditions per place. [2025-04-13 19:11:04,949 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 146 selfloop transitions, 23 changer transitions 0/174 dead transitions. [2025-04-13 19:11:04,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 174 transitions, 858 flow [2025-04-13 19:11:04,950 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 19:11:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 19:11:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 349 transitions. [2025-04-13 19:11:04,951 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5816666666666667 [2025-04-13 19:11:04,952 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 24 states and 349 transitions. [2025-04-13 19:11:04,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 174 transitions, 858 flow [2025-04-13 19:11:04,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 174 transitions, 786 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-04-13 19:11:04,962 INFO L231 Difference]: Finished difference. Result has 78 places, 42 transitions, 280 flow [2025-04-13 19:11:04,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=280, PETRI_PLACES=78, PETRI_TRANSITIONS=42} [2025-04-13 19:11:04,962 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2025-04-13 19:11:04,963 INFO L485 AbstractCegarLoop]: Abstraction has has 78 places, 42 transitions, 280 flow [2025-04-13 19:11:04,964 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.28) internal successors, (207), 25 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:04,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:04,964 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:04,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 19:11:05,168 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:05,168 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:05,168 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1097522242, now seen corresponding path program 4 times [2025-04-13 19:11:05,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:05,169 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958191829] [2025-04-13 19:11:05,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:05,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:05,178 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-04-13 19:11:05,187 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-13 19:11:05,188 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:05,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:05,569 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958191829] [2025-04-13 19:11:05,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958191829] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:05,569 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002308815] [2025-04-13 19:11:05,569 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:05,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:05,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:05,573 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) [2025-04-13 19:11:05,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 19:11:05,612 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-04-13 19:11:05,636 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-13 19:11:05,636 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:05,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:05,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-13 19:11:05,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:05,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:05,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002308815] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:05,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:05,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-04-13 19:11:05,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112251159] [2025-04-13 19:11:05,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:05,999 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 19:11:06,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:06,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 19:11:06,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2025-04-13 19:11:06,001 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:06,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 42 transitions, 280 flow. Second operand has 28 states, 28 states have (on average 8.25) internal successors, (231), 28 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:06,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:06,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:06,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:06,341 INFO L116 PetriNetUnfolderBase]: 547/841 cut-off events. [2025-04-13 19:11:06,341 INFO L117 PetriNetUnfolderBase]: For 9324/9324 co-relation queries the response was YES. [2025-04-13 19:11:06,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 841 events. 547/841 cut-off events. For 9324/9324 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2579 event pairs, 20 based on Foata normal form. 36/691 useless extension candidates. Maximal degree in co-relation 2618. Up to 184 conditions per place. [2025-04-13 19:11:06,346 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 170 selfloop transitions, 27 changer transitions 0/202 dead transitions. [2025-04-13 19:11:06,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 202 transitions, 1018 flow [2025-04-13 19:11:06,346 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-13 19:11:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-13 19:11:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 397 transitions. [2025-04-13 19:11:06,347 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5671428571428572 [2025-04-13 19:11:06,347 INFO L175 Difference]: Start difference. First operand has 78 places, 42 transitions, 280 flow. Second operand 28 states and 397 transitions. [2025-04-13 19:11:06,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 202 transitions, 1018 flow [2025-04-13 19:11:06,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 202 transitions, 914 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-04-13 19:11:06,360 INFO L231 Difference]: Finished difference. Result has 98 places, 46 transitions, 280 flow [2025-04-13 19:11:06,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=280, PETRI_PLACES=98, PETRI_TRANSITIONS=46} [2025-04-13 19:11:06,362 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 73 predicate places. [2025-04-13 19:11:06,362 INFO L485 AbstractCegarLoop]: Abstraction has has 98 places, 46 transitions, 280 flow [2025-04-13 19:11:06,362 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.25) internal successors, (231), 28 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:06,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:06,362 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:06,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-13 19:11:06,563 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:06,563 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:06,563 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1839763394, now seen corresponding path program 5 times [2025-04-13 19:11:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:06,564 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835872536] [2025-04-13 19:11:06,564 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:11:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:06,570 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 14 equivalence classes. [2025-04-13 19:11:06,654 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 19:11:06,654 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-04-13 19:11:06,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:08,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:08,235 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835872536] [2025-04-13 19:11:08,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835872536] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:08,235 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223740350] [2025-04-13 19:11:08,235 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 19:11:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:08,238 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) [2025-04-13 19:11:08,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 19:11:08,278 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 14 equivalence classes. [2025-04-13 19:11:08,311 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 19:11:08,312 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-04-13 19:11:08,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:08,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-04-13 19:11:08,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:09,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:11,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223740350] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:11,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:11,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2025-04-13 19:11:11,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775711862] [2025-04-13 19:11:11,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:11,268 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2025-04-13 19:11:11,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:11,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2025-04-13 19:11:11,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=7231, Unknown=0, NotChecked=0, Total=8556 [2025-04-13 19:11:11,416 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:11:11,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 46 transitions, 280 flow. Second operand has 93 states, 93 states have (on average 3.172043010752688) internal successors, (295), 93 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:11,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:11,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:11:11,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:33,813 INFO L116 PetriNetUnfolderBase]: 31526/47554 cut-off events. [2025-04-13 19:11:33,813 INFO L117 PetriNetUnfolderBase]: For 200514/200514 co-relation queries the response was YES. [2025-04-13 19:11:33,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140857 conditions, 47554 events. 31526/47554 cut-off events. For 200514/200514 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 276412 event pairs, 714 based on Foata normal form. 463/40002 useless extension candidates. Maximal degree in co-relation 140813. Up to 6918 conditions per place. [2025-04-13 19:11:34,088 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 669 selfloop transitions, 1594 changer transitions 325/2588 dead transitions. [2025-04-13 19:11:34,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 2588 transitions, 20673 flow [2025-04-13 19:11:34,092 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2025-04-13 19:11:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2025-04-13 19:11:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 1476 transitions. [2025-04-13 19:11:34,100 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4016326530612245 [2025-04-13 19:11:34,100 INFO L175 Difference]: Start difference. First operand has 98 places, 46 transitions, 280 flow. Second operand 147 states and 1476 transitions. [2025-04-13 19:11:34,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 2588 transitions, 20673 flow [2025-04-13 19:11:34,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 2588 transitions, 16651 flow, removed 754 selfloop flow, removed 23 redundant places. [2025-04-13 19:11:34,528 INFO L231 Difference]: Finished difference. Result has 283 places, 1740 transitions, 10636 flow [2025-04-13 19:11:34,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=147, PETRI_FLOW=10636, PETRI_PLACES=283, PETRI_TRANSITIONS=1740} [2025-04-13 19:11:34,529 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 258 predicate places. [2025-04-13 19:11:34,529 INFO L485 AbstractCegarLoop]: Abstraction has has 283 places, 1740 transitions, 10636 flow [2025-04-13 19:11:34,529 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.172043010752688) internal successors, (295), 93 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:34,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:34,529 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:34,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-13 19:11:34,734 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:34,734 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 19:11:34,734 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -829121944, now seen corresponding path program 1 times [2025-04-13 19:11:34,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:34,734 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416747393] [2025-04-13 19:11:34,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:34,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:34,739 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-04-13 19:11:34,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-04-13 19:11:34,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:34,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:36,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:36,053 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416747393] [2025-04-13 19:11:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416747393] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:36,053 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432670729] [2025-04-13 19:11:36,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:36,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:36,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:36,054 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) [2025-04-13 19:11:36,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 19:11:36,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-04-13 19:11:36,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-04-13 19:11:36,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:36,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:36,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-04-13 19:11:36,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:37,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432670729] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:38,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:38,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 98 [2025-04-13 19:11:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310590167] [2025-04-13 19:11:38,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:38,781 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2025-04-13 19:11:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:38,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2025-04-13 19:11:38,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1416, Invalid=8484, Unknown=0, NotChecked=0, Total=9900 [2025-04-13 19:11:38,881 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:11:38,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 1740 transitions, 10636 flow. Second operand has 100 states, 100 states have (on average 3.23) internal successors, (323), 100 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:38,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:38,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:11:38,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand