/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-5.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:10:59,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:10:59,176 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 19:10:59,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:10:59,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:10:59,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:10:59,204 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:10:59,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:10:59,204 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:10:59,205 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:10:59,205 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:10:59,205 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:10:59,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:10:59,206 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:10:59,206 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:10:59,206 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:10:59,206 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:10:59,206 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:10:59,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:10:59,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:10:59,206 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:10:59,207 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,207 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:10:59,207 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,208 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:10:59,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:10:59,208 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 19:10:59,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:10:59,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:10:59,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:10:59,446 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:10:59,446 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:10:59,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2025-04-13 19:11:00,730 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afcdee0d1/d33d7fab901240708625dfaa25898a1d/FLAG0ae2800cc [2025-04-13 19:11:00,943 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:11:00,943 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2025-04-13 19:11:00,955 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afcdee0d1/d33d7fab901240708625dfaa25898a1d/FLAG0ae2800cc [2025-04-13 19:11:01,778 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afcdee0d1/d33d7fab901240708625dfaa25898a1d [2025-04-13 19:11:01,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:11:01,781 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:11:01,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:01,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:11:01,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:11:01,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,785 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155f8231 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 19:11:01,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,802 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:11:02,020 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-5.i[30243,30256] [2025-04-13 19:11:02,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,051 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:11:02,096 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-5.i[30243,30256] [2025-04-13 19:11:02,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,125 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:11:02,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02 WrapperNode [2025-04-13 19:11:02,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:02,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:11:02,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:11:02,131 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 19:11:02,139 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 19:11:02,153 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 19:11:02,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:11:02,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:11:02,159 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 19:11:02,160 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 19:11:02,162 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 19:11:02,178 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 19:11:02,179 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 19:11:02,179 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 19:11:02,183 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 19:11:02,184 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 19:11:02,186 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 19:11:02,188 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 19:11:02,189 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 19:11:02,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,192 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:11:02,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:11:02,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:11:02,193 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 19:11:02,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:11:02,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:02,218 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 19:11:02,220 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 19:11:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 19:11:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 19:11:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 19:11:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 19:11:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:11:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:11:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:11:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:11:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:11:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:11:02,236 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 19:11:02,333 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:11:02,334 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:11:02,462 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:11:02,463 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:11:02,463 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:11:02,573 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:02,576 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:11:02,579 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:11:02,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:02 BoogieIcfgContainer [2025-04-13 19:11:02,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:11:02,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:11:02,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:11:02,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:11:02,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:11:01" (1/3) ... [2025-04-13 19:11:02,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e577b5 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 19:11:02,585 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 19:11:02,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e577b5 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 19:11:02,586 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 19:11:02,586 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2025-04-13 19:11:02,596 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:11:02,597 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-5.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 19:11:02,597 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:11:02,636 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:11:02,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:02,687 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 19:11:02,690 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:02,692 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 19:11:02,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 19:11:02,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 19:11:02,705 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:11:02,716 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;@7f019029, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:11:02,716 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 19:11:02,728 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:02,728 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:02,729 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 19:11:02,732 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1561770242, now seen corresponding path program 1 times [2025-04-13 19:11:02,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:02,740 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337632048] [2025-04-13 19:11:02,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:02,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 19:11:02,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 19:11:02,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:02,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:02,920 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 19:11:02,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:02,921 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337632048] [2025-04-13 19:11:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337632048] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:11:02,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:11:02,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:11:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921668132] [2025-04-13 19:11:02,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:11:02,929 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:11:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:02,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:11:02,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:11:02,949 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:02,951 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 19:11:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,065 INFO L116 PetriNetUnfolderBase]: 115/193 cut-off events. [2025-04-13 19:11:03,065 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:11:03,066 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 19:11:03,068 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 20 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2025-04-13 19:11:03,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:03,069 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:11:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:11:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-04-13 19:11:03,076 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2025-04-13 19:11:03,077 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 49 transitions. [2025-04-13 19:11:03,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 108 flow [2025-04-13 19:11:03,080 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 19:11:03,081 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:03,083 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 19:11:03,085 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 19:11:03,085 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 19:11:03,085 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 19:11:03,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,086 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,086 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:11:03,086 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 19:11:03,086 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1170211856, now seen corresponding path program 1 times [2025-04-13 19:11:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,087 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696236837] [2025-04-13 19:11:03,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:03,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:03,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,185 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 19:11:03,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,185 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696236837] [2025-04-13 19:11:03,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696236837] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:03,185 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680918567] [2025-04-13 19:11:03,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:03,189 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 19:11:03,190 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 19:11:03,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:03,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:03,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 19:11:03,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:03,281 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 19:11:03,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:03,296 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 19:11:03,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680918567] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:03,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:03,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 19:11:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895636896] [2025-04-13 19:11:03,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,297 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 19:11:03,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 19:11:03,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 19:11:03,298 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:03,298 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 19:11:03,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:03,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,415 INFO L116 PetriNetUnfolderBase]: 151/247 cut-off events. [2025-04-13 19:11:03,416 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:11:03,417 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 19:11:03,418 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 38 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2025-04-13 19:11:03,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:03,420 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:11:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:11:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2025-04-13 19:11:03,420 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2025-04-13 19:11:03,421 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 88 transitions. [2025-04-13 19:11:03,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 202 flow [2025-04-13 19:11:03,421 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 19:11:03,422 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:03,422 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 19:11:03,423 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 19:11:03,423 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 19:11:03,423 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 19:11:03,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,423 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,430 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 19:11:03,628 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 19:11:03,628 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 19:11:03,628 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash 493351806, now seen corresponding path program 2 times [2025-04-13 19:11:03,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,629 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394414967] [2025-04-13 19:11:03,629 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:03,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,635 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:03,646 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:03,646 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:03,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,742 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 19:11:03,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,743 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394414967] [2025-04-13 19:11:03,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394414967] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:03,743 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002838587] [2025-04-13 19:11:03,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:03,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:03,746 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 19:11:03,747 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 19:11:03,785 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 19:11:03,802 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:03,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:03,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 19:11:03,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:03,822 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 19:11:03,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:03,882 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 19:11:03,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002838587] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:03,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:03,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 19:11:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412439731] [2025-04-13 19:11:03,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,883 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 19:11:03,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 19:11:03,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 19:11:03,884 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:03,884 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 19:11:03,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:03,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:04,034 INFO L116 PetriNetUnfolderBase]: 259/409 cut-off events. [2025-04-13 19:11:04,035 INFO L117 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2025-04-13 19:11:04,036 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 19:11:04,038 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 74 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2025-04-13 19:11:04,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:04,040 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 19:11:04,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 19:11:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2025-04-13 19:11:04,041 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-04-13 19:11:04,041 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 175 transitions. [2025-04-13 19:11:04,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 90 transitions, 416 flow [2025-04-13 19:11:04,044 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 19:11:04,045 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:04,045 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 19:11:04,046 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 19:11:04,046 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 19:11:04,046 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 19:11:04,046 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:04,046 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:04,052 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 19:11:04,247 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 19:11:04,247 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 19:11:04,247 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1439646146, now seen corresponding path program 3 times [2025-04-13 19:11:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:04,248 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715797710] [2025-04-13 19:11:04,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:04,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:04,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:04,300 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:04,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,472 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 19:11:04,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:04,472 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715797710] [2025-04-13 19:11:04,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715797710] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:04,472 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441337934] [2025-04-13 19:11:04,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:04,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:04,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:04,474 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 19:11:04,476 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 19:11:04,513 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 19:11:04,532 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 19:11:04,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 19:11:04,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 19:11:04,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:04,560 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 19:11:04,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:04,645 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 19:11:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441337934] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:04,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2025-04-13 19:11:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786179427] [2025-04-13 19:11:04,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:04,646 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 19:11:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:04,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 19:11:04,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2025-04-13 19:11:04,646 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2025-04-13 19:11:04,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:04,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:04,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2025-04-13 19:11:04,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:04,782 INFO L116 PetriNetUnfolderBase]: 295/463 cut-off events. [2025-04-13 19:11:04,782 INFO L117 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2025-04-13 19:11:04,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 463 events. 295/463 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1392 event pairs, 20 based on Foata normal form. 18/379 useless extension candidates. Maximal degree in co-relation 1376. Up to 100 conditions per place. [2025-04-13 19:11:04,786 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 86 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2025-04-13 19:11:04,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 104 transitions, 518 flow [2025-04-13 19:11:04,788 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 19:11:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 19:11:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 199 transitions. [2025-04-13 19:11:04,789 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5685714285714286 [2025-04-13 19:11:04,789 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 14 states and 199 transitions. [2025-04-13 19:11:04,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 104 transitions, 518 flow [2025-04-13 19:11:04,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 104 transitions, 466 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-04-13 19:11:04,798 INFO L231 Difference]: Finished difference. Result has 58 places, 32 transitions, 160 flow [2025-04-13 19:11:04,799 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=14, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=32} [2025-04-13 19:11:04,800 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 33 predicate places. [2025-04-13 19:11:04,800 INFO L485 AbstractCegarLoop]: Abstraction has has 58 places, 32 transitions, 160 flow [2025-04-13 19:11:04,800 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:04,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:04,800 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:04,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 19:11:05,000 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 19:11:05,001 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 19:11:05,001 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash -519664514, now seen corresponding path program 4 times [2025-04-13 19:11:05,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:05,001 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861523839] [2025-04-13 19:11:05,001 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:05,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:05,012 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 19:11:05,022 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:11:05,022 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:05,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:05,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:05,694 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861523839] [2025-04-13 19:11:05,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861523839] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:05,694 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688957080] [2025-04-13 19:11:05,694 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 19:11:05,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:05,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:05,698 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 19:11:05,699 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 19:11:05,734 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 19:11:05,755 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 19:11:05,755 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 19:11:05,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:05,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 19:11:05,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:06,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:07,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688957080] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:07,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:07,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2025-04-13 19:11:07,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967391774] [2025-04-13 19:11:07,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:07,089 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-04-13 19:11:07,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:07,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-04-13 19:11:07,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2369, Unknown=0, NotChecked=0, Total=2756 [2025-04-13 19:11:07,159 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:11:07,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 32 transitions, 160 flow. Second operand has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 19:11:07,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:07,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:11:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:13,611 INFO L116 PetriNetUnfolderBase]: 8593/13018 cut-off events. [2025-04-13 19:11:13,611 INFO L117 PetriNetUnfolderBase]: For 28592/28592 co-relation queries the response was YES. [2025-04-13 19:11:13,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37222 conditions, 13018 events. 8593/13018 cut-off events. For 28592/28592 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 69067 event pairs, 69 based on Foata normal form. 232/11058 useless extension candidates. Maximal degree in co-relation 37192. Up to 1909 conditions per place. [2025-04-13 19:11:13,669 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 412 selfloop transitions, 445 changer transitions 164/1021 dead transitions. [2025-04-13 19:11:13,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 1021 transitions, 6619 flow [2025-04-13 19:11:13,669 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-04-13 19:11:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2025-04-13 19:11:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 938 transitions. [2025-04-13 19:11:13,675 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38285714285714284 [2025-04-13 19:11:13,675 INFO L175 Difference]: Start difference. First operand has 58 places, 32 transitions, 160 flow. Second operand 98 states and 938 transitions. [2025-04-13 19:11:13,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 1021 transitions, 6619 flow [2025-04-13 19:11:13,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 1021 transitions, 5637 flow, removed 210 selfloop flow, removed 11 redundant places. [2025-04-13 19:11:13,755 INFO L231 Difference]: Finished difference. Result has 178 places, 522 transitions, 3104 flow [2025-04-13 19:11:13,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=3104, PETRI_PLACES=178, PETRI_TRANSITIONS=522} [2025-04-13 19:11:13,755 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 153 predicate places. [2025-04-13 19:11:13,755 INFO L485 AbstractCegarLoop]: Abstraction has has 178 places, 522 transitions, 3104 flow [2025-04-13 19:11:13,756 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 19:11:13,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:13,756 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:13,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 19:11:13,960 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 19:11:13,960 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 19:11:13,960 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -675989848, now seen corresponding path program 1 times [2025-04-13 19:11:13,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:13,961 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792578524] [2025-04-13 19:11:13,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:13,965 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 19:11:13,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:11:13,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:13,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:14,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:14,541 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792578524] [2025-04-13 19:11:14,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792578524] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:14,541 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463259431] [2025-04-13 19:11:14,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:14,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:14,543 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 19:11:14,544 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 19:11:14,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 19:11:14,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:11:14,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:14,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:14,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 19:11:14,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:15,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:15,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463259431] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:15,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:15,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 56 [2025-04-13 19:11:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948207968] [2025-04-13 19:11:15,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:15,667 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-04-13 19:11:15,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:15,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-04-13 19:11:15,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2877, Unknown=0, NotChecked=0, Total=3306 [2025-04-13 19:11:15,733 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:11:15,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 522 transitions, 3104 flow. Second operand has 58 states, 58 states have (on average 3.396551724137931) internal successors, (197), 58 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 19:11:15,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:15,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:11:15,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:46,499 INFO L116 PetriNetUnfolderBase]: 107846/162505 cut-off events. [2025-04-13 19:11:46,499 INFO L117 PetriNetUnfolderBase]: For 3689853/3689853 co-relation queries the response was YES. [2025-04-13 19:11:47,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722213 conditions, 162505 events. 107846/162505 cut-off events. For 3689853/3689853 co-relation queries the response was YES. Maximal size of possible extension queue 2854. Compared 1246986 event pairs, 5931 based on Foata normal form. 1422/134936 useless extension candidates. Maximal degree in co-relation 722147. Up to 22811 conditions per place. [2025-04-13 19:11:48,139 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1509 selfloop transitions, 5733 changer transitions 523/7765 dead transitions. [2025-04-13 19:11:48,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 7765 transitions, 65292 flow [2025-04-13 19:11:48,140 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2025-04-13 19:11:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2025-04-13 19:11:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 2390 transitions. [2025-04-13 19:11:48,145 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3918032786885246 [2025-04-13 19:11:48,145 INFO L175 Difference]: Start difference. First operand has 178 places, 522 transitions, 3104 flow. Second operand 244 states and 2390 transitions. [2025-04-13 19:11:48,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 7765 transitions, 65292 flow [2025-04-13 19:18:55,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 7765 transitions, 58479 flow, removed 3383 selfloop flow, removed 32 redundant places. [2025-04-13 19:18:55,105 INFO L231 Difference]: Finished difference. Result has 439 places, 6208 transitions, 48773 flow [2025-04-13 19:18:55,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=244, PETRI_FLOW=48773, PETRI_PLACES=439, PETRI_TRANSITIONS=6208} [2025-04-13 19:18:55,107 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 414 predicate places. [2025-04-13 19:18:55,107 INFO L485 AbstractCegarLoop]: Abstraction has has 439 places, 6208 transitions, 48773 flow [2025-04-13 19:18:55,107 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.396551724137931) internal successors, (197), 58 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 19:18:55,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:18:55,108 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:18:55,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-13 19:18:55,308 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 19:18:55,308 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 19:18:55,310 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:18:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -676652938, now seen corresponding path program 2 times [2025-04-13 19:18:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:18:55,311 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683567566] [2025-04-13 19:18:55,311 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:18:55,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:18:55,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-13 19:18:55,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:18:55,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:18:55,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:18:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:18:56,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:18:56,187 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683567566] [2025-04-13 19:18:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683567566] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:18:56,187 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082063409] [2025-04-13 19:18:56,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:18:56,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:18:56,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:18:56,190 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 19:18:56,191 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 19:18:56,238 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-13 19:18:56,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 19:18:56,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:18:56,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:18:56,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 19:18:56,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:18:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:18:56,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:18:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:18:57,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082063409] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:18:57,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:18:57,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 19:18:57,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381714842] [2025-04-13 19:18:57,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:18:57,603 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 19:18:57,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:18:57,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 19:18:57,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=2997, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 19:18:57,745 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 19:18:57,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 6208 transitions, 48773 flow. Second operand has 59 states, 59 states have (on average 3.3728813559322033) internal successors, (199), 59 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 19:18:57,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:18:57,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 19:18:57,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand