/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/bigshot_s2.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:10:59,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:10:59,287 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 19:10:59,291 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:10:59,291 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:10:59,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:10:59,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:10:59,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:10:59,307 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:10:59,308 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:10:59,308 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:10:59,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:10:59,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:10:59,309 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:10:59,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:10:59,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:10:59,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:10:59,310 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 19:10:59,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:10:59,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:10:59,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:10:59,558 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:10:59,559 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:10:59,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.i [2025-04-13 19:11:00,865 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcd39d53/d34a76ec797247b7b4089fa3f1f01e23/FLAGf3f64f3d0 [2025-04-13 19:11:01,148 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:11:01,148 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i [2025-04-13 19:11:01,165 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcd39d53/d34a76ec797247b7b4089fa3f1f01e23/FLAGf3f64f3d0 [2025-04-13 19:11:01,867 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcd39d53/d34a76ec797247b7b4089fa3f1f01e23 [2025-04-13 19:11:01,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:11:01,870 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:11:01,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:01,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:11:01,875 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:11:01,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@752c026f 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 19:11:01,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:11:01" (1/1) ... [2025-04-13 19:11:01,907 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:11:02,292 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/bigshot_s2.i[55203,55216] [2025-04-13 19:11:02,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,314 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:11:02,363 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/bigshot_s2.i[55203,55216] [2025-04-13 19:11:02,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:11:02,410 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:11:02,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:11:02 WrapperNode [2025-04-13 19:11:02,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:11:02,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:11:02,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:11:02,416 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 19:11:02,429 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 19:11:02,448 INFO L138 Inliner]: procedures = 322, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2025-04-13 19:11:02,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:11:02,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:11:02,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:11:02,454 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 19:11:02,454 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 19:11:02,456 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 19:11:02,468 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 2, 9]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 1 writes are split as follows [0, 1, 0]. [2025-04-13 19:11:02,468 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 19:11:02,469 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 19:11:02,472 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 19:11:02,472 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 19:11:02,478 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 19:11:02,479 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 19:11:02,480 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 19:11:02,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:11:02,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:11:02,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:11:02,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:11:02,485 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 19:11:02,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:11:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:02,510 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 19:11:02,512 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 19:11:02,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-04-13 19:11:02,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-04-13 19:11:02,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-04-13 19:11:02,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:11:02,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:11:02,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 19:11:02,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 19:11:02,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:11:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:11:02,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:11:02,529 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 19:11:02,615 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:11:02,616 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:11:02,744 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:11:02,746 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:11:02,746 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:11:02,852 INFO L313 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-13 19:11:02,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:11:02 BoogieIcfgContainer [2025-04-13 19:11:02,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:11:02,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:11:02,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:11:02,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:11:02,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:11:01" (1/3) ... [2025-04-13 19:11:02,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694007d6 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 19:11:02,858 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 19:11:02,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694007d6 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 19:11:02,859 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 19:11:02,859 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2025-04-13 19:11:02,868 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:11:02,870 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.i that has 3 procedures, 16 locations, 15 edges, 1 initial locations, 1 loop locations, and 1 error locations. [2025-04-13 19:11:02,870 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:11:02,904 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 19:11:02,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 17 transitions, 48 flow [2025-04-13 19:11:02,955 INFO L116 PetriNetUnfolderBase]: 2/15 cut-off events. [2025-04-13 19:11:02,956 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:11:02,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 15 events. 2/15 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2025-04-13 19:11:02,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 17 transitions, 48 flow [2025-04-13 19:11:02,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 14 transitions, 40 flow [2025-04-13 19:11:02,975 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:11:02,987 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;@112d36b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:11:02,987 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 19:11:02,992 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:11:02,992 INFO L116 PetriNetUnfolderBase]: 2/13 cut-off events. [2025-04-13 19:11:02,993 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:11:02,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:02,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:02,993 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 19:11:02,999 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2024849447, now seen corresponding path program 1 times [2025-04-13 19:11:03,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,004 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548499726] [2025-04-13 19:11:03,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,092 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 19:11:03,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 19:11:03,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,207 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 19:11:03,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,209 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548499726] [2025-04-13 19:11:03,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548499726] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:11:03,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:11:03,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:11:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505210011] [2025-04-13 19:11:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,215 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:11:03,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:11:03,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:11:03,235 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2025-04-13 19:11:03,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 19:11:03,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2025-04-13 19:11:03,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,273 INFO L116 PetriNetUnfolderBase]: 5/20 cut-off events. [2025-04-13 19:11:03,274 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:11:03,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 20 events. 5/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 2 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 29. Up to 17 conditions per place. [2025-04-13 19:11:03,275 INFO L140 encePairwiseOnDemand]: 15/17 looper letters, 13 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2025-04-13 19:11:03,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 68 flow [2025-04-13 19:11:03,276 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:11:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:11:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2025-04-13 19:11:03,283 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-04-13 19:11:03,284 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 21 transitions. [2025-04-13 19:11:03,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 68 flow [2025-04-13 19:11:03,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 14 transitions, 60 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 19:11:03,288 INFO L231 Difference]: Finished difference. Result has 17 places, 13 transitions, 32 flow [2025-04-13 19:11:03,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2025-04-13 19:11:03,292 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2025-04-13 19:11:03,292 INFO L485 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 32 flow [2025-04-13 19:11:03,292 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 19:11:03,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,292 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,293 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:11:03,293 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 19:11:03,293 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash 488439659, now seen corresponding path program 1 times [2025-04-13 19:11:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,293 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118819365] [2025-04-13 19:11:03,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:11:03,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:11:03,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,676 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 19:11:03,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,676 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118819365] [2025-04-13 19:11:03,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118819365] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:11:03,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:11:03,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:11:03,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793252365] [2025-04-13 19:11:03,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:11:03,677 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 19:11:03,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:03,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 19:11:03,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-04-13 19:11:03,677 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2025-04-13 19:11:03,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 13 transitions, 32 flow. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 19:11:03,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:03,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2025-04-13 19:11:03,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:03,739 INFO L116 PetriNetUnfolderBase]: 9/28 cut-off events. [2025-04-13 19:11:03,739 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 19:11:03,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 28 events. 9/28 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 3 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 45. Up to 22 conditions per place. [2025-04-13 19:11:03,740 INFO L140 encePairwiseOnDemand]: 13/17 looper letters, 13 selfloop transitions, 5 changer transitions 0/18 dead transitions. [2025-04-13 19:11:03,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 18 transitions, 78 flow [2025-04-13 19:11:03,740 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 19:11:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 19:11:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 29 transitions. [2025-04-13 19:11:03,742 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3411764705882353 [2025-04-13 19:11:03,742 INFO L175 Difference]: Start difference. First operand has 17 places, 13 transitions, 32 flow. Second operand 5 states and 29 transitions. [2025-04-13 19:11:03,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 18 transitions, 78 flow [2025-04-13 19:11:03,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 18 transitions, 77 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:03,743 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 58 flow [2025-04-13 19:11:03,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2025-04-13 19:11:03,744 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2025-04-13 19:11:03,744 INFO L485 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 58 flow [2025-04-13 19:11:03,744 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 19:11:03,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:03,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:03,745 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:11:03,745 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 19:11:03,745 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2026252657, now seen corresponding path program 1 times [2025-04-13 19:11:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:03,746 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833697809] [2025-04-13 19:11:03,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:03,753 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-13 19:11:03,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-13 19:11:03,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,897 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 19:11:03,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:03,897 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833697809] [2025-04-13 19:11:03,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833697809] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:03,898 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158485335] [2025-04-13 19:11:03,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:11:03,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:03,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:03,903 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 19:11:03,904 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 19:11:03,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-13 19:11:03,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-13 19:11:03,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:11:03,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:03,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 19:11:03,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:04,037 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 19:11:04,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:04,074 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 19:11:04,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158485335] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:04,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:04,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-04-13 19:11:04,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244170957] [2025-04-13 19:11:04,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:04,075 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 19:11:04,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:04,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 19:11:04,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-04-13 19:11:04,076 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2025-04-13 19:11:04,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 58 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 19:11:04,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:04,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2025-04-13 19:11:04,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:04,161 INFO L116 PetriNetUnfolderBase]: 7/26 cut-off events. [2025-04-13 19:11:04,161 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-13 19:11:04,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 26 events. 7/26 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 17 event pairs, 3 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 59. Up to 20 conditions per place. [2025-04-13 19:11:04,161 INFO L140 encePairwiseOnDemand]: 13/17 looper letters, 13 selfloop transitions, 4 changer transitions 0/17 dead transitions. [2025-04-13 19:11:04,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 17 transitions, 91 flow [2025-04-13 19:11:04,162 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 19:11:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 19:11:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2025-04-13 19:11:04,163 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32941176470588235 [2025-04-13 19:11:04,163 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 58 flow. Second operand 5 states and 28 transitions. [2025-04-13 19:11:04,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 17 transitions, 91 flow [2025-04-13 19:11:04,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 86 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-13 19:11:04,164 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 56 flow [2025-04-13 19:11:04,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=56, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2025-04-13 19:11:04,164 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 6 predicate places. [2025-04-13 19:11:04,165 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 56 flow [2025-04-13 19:11:04,165 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 19:11:04,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:04,165 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:04,171 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 19:11:04,365 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:04,366 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 19:11:04,366 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2017843869, now seen corresponding path program 2 times [2025-04-13 19:11:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:04,366 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525889852] [2025-04-13 19:11:04,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:04,375 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-04-13 19:11:04,381 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:11:04,381 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:04,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:04,529 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525889852] [2025-04-13 19:11:04,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525889852] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:04,529 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930050604] [2025-04-13 19:11:04,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:11:04,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:04,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:04,531 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 19:11:04,533 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 19:11:04,583 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-04-13 19:11:04,604 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 19:11:04,604 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 19:11:04,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:04,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 19:11:04,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:04,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930050604] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:04,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:04,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-04-13 19:11:04,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809284130] [2025-04-13 19:11:04,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:04,735 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-13 19:11:04,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:04,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-13 19:11:04,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-04-13 19:11:04,735 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2025-04-13 19:11:04,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 56 flow. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:04,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:04,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2025-04-13 19:11:04,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:04,841 INFO L116 PetriNetUnfolderBase]: 8/29 cut-off events. [2025-04-13 19:11:04,841 INFO L117 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-04-13 19:11:04,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 29 events. 8/29 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 3 based on Foata normal form. 2/31 useless extension candidates. Maximal degree in co-relation 69. Up to 20 conditions per place. [2025-04-13 19:11:04,842 INFO L140 encePairwiseOnDemand]: 13/17 looper letters, 14 selfloop transitions, 5 changer transitions 0/19 dead transitions. [2025-04-13 19:11:04,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 104 flow [2025-04-13 19:11:04,842 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:11:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:11:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 32 transitions. [2025-04-13 19:11:04,845 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3137254901960784 [2025-04-13 19:11:04,845 INFO L175 Difference]: Start difference. First operand has 25 places, 15 transitions, 56 flow. Second operand 6 states and 32 transitions. [2025-04-13 19:11:04,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 104 flow [2025-04-13 19:11:04,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 19:11:04,846 INFO L231 Difference]: Finished difference. Result has 27 places, 16 transitions, 68 flow [2025-04-13 19:11:04,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=16} [2025-04-13 19:11:04,847 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2025-04-13 19:11:04,847 INFO L485 AbstractCegarLoop]: Abstraction has has 27 places, 16 transitions, 68 flow [2025-04-13 19:11:04,847 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:11:04,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:11:04,847 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:11:04,858 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 19:11:05,053 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,SelfDestructingSolverStorable3 [2025-04-13 19:11:05,053 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 19:11:05,053 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:11:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1871384513, now seen corresponding path program 3 times [2025-04-13 19:11:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:11:05,054 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092163246] [2025-04-13 19:11:05,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:11:05,062 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-04-13 19:11:05,069 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:05,069 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 19:11:05,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:05,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:11:05,518 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092163246] [2025-04-13 19:11:05,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092163246] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 19:11:05,518 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920864138] [2025-04-13 19:11:05,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:11:05,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:11:05,521 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 19:11:05,523 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 19:11:05,570 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-04-13 19:11:05,590 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 19:11:05,590 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 19:11:05,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:11:05,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 19:11:05,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 19:11:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:05,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 19:11:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:11:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920864138] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 19:11:05,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 19:11:05,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2025-04-13 19:11:05,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878696679] [2025-04-13 19:11:05,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 19:11:05,764 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-13 19:11:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:11:05,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-13 19:11:05,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2025-04-13 19:11:05,765 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2025-04-13 19:11:05,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 16 transitions, 68 flow. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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 19:11:05,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:11:05,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2025-04-13 19:11:05,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:11:05,988 INFO L116 PetriNetUnfolderBase]: 9/31 cut-off events. [2025-04-13 19:11:05,989 INFO L117 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-04-13 19:11:05,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 31 events. 9/31 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 23 event pairs, 1 based on Foata normal form. 3/34 useless extension candidates. Maximal degree in co-relation 85. Up to 10 conditions per place. [2025-04-13 19:11:05,989 INFO L140 encePairwiseOnDemand]: 12/17 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2025-04-13 19:11:05,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 22 transitions, 128 flow [2025-04-13 19:11:05,990 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 19:11:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 19:11:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2025-04-13 19:11:05,991 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27450980392156865 [2025-04-13 19:11:05,991 INFO L175 Difference]: Start difference. First operand has 27 places, 16 transitions, 68 flow. Second operand 9 states and 42 transitions. [2025-04-13 19:11:05,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 22 transitions, 128 flow [2025-04-13 19:11:05,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 116 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-04-13 19:11:05,992 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2025-04-13 19:11:05,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2025-04-13 19:11:05,992 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 11 predicate places. [2025-04-13 19:11:05,992 INFO L485 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2025-04-13 19:11:05,992 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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 19:11:05,995 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 19:11:05,995 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 19:11:05,995 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 19:11:06,001 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 19:11:06,200 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 19:11:06,200 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2025-04-13 19:11:06,203 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 19:11:06,203 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 19:11:06,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 07:11:06 BasicIcfg [2025-04-13 19:11:06,206 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 19:11:06,207 INFO L158 Benchmark]: Toolchain (without parser) took 4337.46ms. Allocated memory is still 155.2MB. Free memory was 106.7MB in the beginning and 107.0MB in the end (delta: -367.9kB). Peak memory consumption was 1.1MB. Max. memory is 8.0GB. [2025-04-13 19:11:06,207 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 159.4MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:11:06,207 INFO L158 Benchmark]: CACSL2BoogieTranslator took 540.99ms. Allocated memory is still 155.2MB. Free memory was 106.7MB in the beginning and 71.5MB in the end (delta: 35.2MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. [2025-04-13 19:11:06,207 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.67ms. Allocated memory is still 155.2MB. Free memory was 71.5MB in the beginning and 69.1MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:11:06,207 INFO L158 Benchmark]: Boogie Preprocessor took 34.73ms. Allocated memory is still 155.2MB. Free memory was 69.1MB in the beginning and 67.3MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 19:11:06,208 INFO L158 Benchmark]: RCFGBuilder took 367.84ms. Allocated memory is still 155.2MB. Free memory was 66.5MB in the beginning and 39.8MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 19:11:06,208 INFO L158 Benchmark]: TraceAbstraction took 3352.22ms. Allocated memory is still 155.2MB. Free memory was 39.0MB in the beginning and 107.0MB in the end (delta: -68.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:11:06,211 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 159.4MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 540.99ms. Allocated memory is still 155.2MB. Free memory was 106.7MB in the beginning and 71.5MB in the end (delta: 35.2MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.67ms. Allocated memory is still 155.2MB. Free memory was 71.5MB in the beginning and 69.1MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 34.73ms. Allocated memory is still 155.2MB. Free memory was 69.1MB in the beginning and 67.3MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 367.84ms. Allocated memory is still 155.2MB. Free memory was 66.5MB in the beginning and 39.8MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 3352.22ms. Allocated memory is still 155.2MB. Free memory was 39.0MB in the beginning and 107.0MB in the end (delta: -68.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1107]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 23 locations, 26 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.3s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 89 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 406 IncrementalHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 406 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=4, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 1157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 486 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 1/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 19:11:06,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...