/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_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 01:37:17,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 01:37:17,867 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 [2025-04-14 01:37:17,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 01:37:17,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 01:37:17,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 01:37:17,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 01:37:17,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 01:37:17,899 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 01:37:17,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 01:37:17,900 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 01:37:17,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 01:37:17,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 01:37:17,901 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:37:17,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:37:17,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:37:17,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 01:37:17,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 01:37:17,902 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 01:37:18,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 01:37:18,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 01:37:18,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 01:37:18,153 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 01:37:18,154 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 01:37:18,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2025-04-14 01:37:19,489 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f896b2a7/1b8106ec89a1402ea75425d2ae266b5d/FLAG9b799be48 [2025-04-14 01:37:19,728 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 01:37:19,729 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2025-04-14 01:37:19,735 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f896b2a7/1b8106ec89a1402ea75425d2ae266b5d/FLAG9b799be48 [2025-04-14 01:37:20,539 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f896b2a7/1b8106ec89a1402ea75425d2ae266b5d [2025-04-14 01:37:20,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 01:37:20,543 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 01:37:20,544 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 01:37:20,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 01:37:20,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 01:37:20,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236a7b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20, skipping insertion in model container [2025-04-14 01:37:20,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,563 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 01:37:20,701 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2526,2539] [2025-04-14 01:37:20,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:37:20,718 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 01:37:20,738 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2526,2539] [2025-04-14 01:37:20,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:37:20,750 INFO L204 MainTranslator]: Completed translation [2025-04-14 01:37:20,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20 WrapperNode [2025-04-14 01:37:20,751 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 01:37:20,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 01:37:20,752 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 01:37:20,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 01:37:20,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,763 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,783 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 128 [2025-04-14 01:37:20,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 01:37:20,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 01:37:20,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 01:37:20,787 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 01:37:20,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,800 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,817 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-04-14 01:37:20,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,825 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 01:37:20,835 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 01:37:20,835 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 01:37:20,835 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 01:37:20,835 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (1/1) ... [2025-04-14 01:37:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:37:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:20,860 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) [2025-04-14 01:37:20,863 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 [2025-04-14 01:37:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 01:37:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 01:37:20,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 01:37:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 01:37:20,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 01:37:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 01:37:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-14 01:37:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-14 01:37:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-14 01:37:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-14 01:37:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 01:37:20,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 01:37:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-14 01:37:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-14 01:37:20,888 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 01:37:20,975 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 01:37:20,976 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 01:37:21,236 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 01:37:21,237 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 01:37:21,237 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 01:37:21,453 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 01:37:21,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:37:21 BoogieIcfgContainer [2025-04-14 01:37:21,458 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 01:37:21,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 01:37:21,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 01:37:21,464 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 01:37:21,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 01:37:20" (1/3) ... [2025-04-14 01:37:21,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43787615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:37:21, skipping insertion in model container [2025-04-14 01:37:21,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:37:20" (2/3) ... [2025-04-14 01:37:21,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43787615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:37:21, skipping insertion in model container [2025-04-14 01:37:21,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:37:21" (3/3) ... [2025-04-14 01:37:21,467 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2025-04-14 01:37:21,480 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 01:37:21,482 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-3.wvr.c that has 3 procedures, 17 locations, 17 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-14 01:37:21,482 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 01:37:21,534 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-14 01:37:21,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions, 52 flow [2025-04-14 01:37:21,604 INFO L116 PetriNetUnfolderBase]: 3/17 cut-off events. [2025-04-14 01:37:21,606 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:37:21,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 3/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-04-14 01:37:21,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 19 transitions, 52 flow [2025-04-14 01:37:21,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 16 transitions, 44 flow [2025-04-14 01:37:21,619 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:37:21,630 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;@5bf814ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:37:21,630 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 01:37:21,638 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:37:21,638 INFO L116 PetriNetUnfolderBase]: 3/15 cut-off events. [2025-04-14 01:37:21,638 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:37:21,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:21,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:21,639 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:21,643 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:21,643 INFO L85 PathProgramCache]: Analyzing trace with hash 925727167, now seen corresponding path program 1 times [2025-04-14 01:37:21,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:21,649 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688229482] [2025-04-14 01:37:21,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:37:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:21,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-14 01:37:21,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 01:37:21,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:21,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:37:21,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:21,985 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688229482] [2025-04-14 01:37:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688229482] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:37:21,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:37:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-14 01:37:21,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294684452] [2025-04-14 01:37:21,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:37:21,991 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:37:21,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:22,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:37:22,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:37:22,020 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:22,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2025-04-14 01:37:22,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:22,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:22,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:22,102 INFO L116 PetriNetUnfolderBase]: 38/70 cut-off events. [2025-04-14 01:37:22,102 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-14 01:37:22,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 70 events. 38/70 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 118 event pairs, 22 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-04-14 01:37:22,107 INFO L140 encePairwiseOnDemand]: 16/19 looper letters, 15 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2025-04-14 01:37:22,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 80 flow [2025-04-14 01:37:22,108 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:37:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:37:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 24 transitions. [2025-04-14 01:37:22,117 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2025-04-14 01:37:22,118 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 24 transitions. [2025-04-14 01:37:22,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 80 flow [2025-04-14 01:37:22,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-14 01:37:22,124 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2025-04-14 01:37:22,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-04-14 01:37:22,128 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2025-04-14 01:37:22,128 INFO L485 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2025-04-14 01:37:22,129 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2025-04-14 01:37:22,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:22,129 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:22,129 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 01:37:22,129 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:22,130 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash -682925150, now seen corresponding path program 1 times [2025-04-14 01:37:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:22,131 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601267162] [2025-04-14 01:37:22,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:37:22,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:22,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-14 01:37:22,166 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-14 01:37:22,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:22,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:22,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:22,258 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601267162] [2025-04-14 01:37:22,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601267162] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:37:22,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:37:22,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 01:37:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106691577] [2025-04-14 01:37:22,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:37:22,259 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:37:22,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:22,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:37:22,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:37:22,260 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:22,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2025-04-14 01:37:22,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:22,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:22,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:22,353 INFO L116 PetriNetUnfolderBase]: 69/125 cut-off events. [2025-04-14 01:37:22,354 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 01:37:22,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 125 events. 69/125 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 314 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 254. Up to 72 conditions per place. [2025-04-14 01:37:22,355 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 24 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2025-04-14 01:37:22,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 28 transitions, 129 flow [2025-04-14 01:37:22,357 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:37:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:37:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-04-14 01:37:22,358 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2025-04-14 01:37:22,358 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 34 transitions. [2025-04-14 01:37:22,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 28 transitions, 129 flow [2025-04-14 01:37:22,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 28 transitions, 125 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 01:37:22,359 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 63 flow [2025-04-14 01:37:22,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2025-04-14 01:37:22,359 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2025-04-14 01:37:22,359 INFO L485 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 63 flow [2025-04-14 01:37:22,360 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2025-04-14 01:37:22,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:22,360 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:22,360 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 01:37:22,360 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:22,360 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash 310437684, now seen corresponding path program 1 times [2025-04-14 01:37:22,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:22,361 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731216466] [2025-04-14 01:37:22,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:37:22,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:22,375 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:37:22,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:22,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:22,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:22,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:22,578 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731216466] [2025-04-14 01:37:22,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731216466] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:37:22,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:37:22,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 01:37:22,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920264073] [2025-04-14 01:37:22,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:37:22,579 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:37:22,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:22,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:37:22,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:37:22,579 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:22,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2025-04-14 01:37:22,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:22,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:22,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:22,741 INFO L116 PetriNetUnfolderBase]: 78/153 cut-off events. [2025-04-14 01:37:22,741 INFO L117 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-04-14 01:37:22,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 153 events. 78/153 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 24 based on Foata normal form. 9/161 useless extension candidates. Maximal degree in co-relation 351. Up to 81 conditions per place. [2025-04-14 01:37:22,742 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 29 selfloop transitions, 4 changer transitions 7/40 dead transitions. [2025-04-14 01:37:22,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 40 transitions, 200 flow [2025-04-14 01:37:22,742 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:37:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:37:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-04-14 01:37:22,743 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2025-04-14 01:37:22,743 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 63 flow. Second operand 5 states and 48 transitions. [2025-04-14 01:37:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 40 transitions, 200 flow [2025-04-14 01:37:22,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:37:22,744 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 91 flow [2025-04-14 01:37:22,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2025-04-14 01:37:22,745 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2025-04-14 01:37:22,745 INFO L485 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 91 flow [2025-04-14 01:37:22,745 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2025-04-14 01:37:22,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:22,745 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:22,745 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-14 01:37:22,745 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:22,746 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1325545405, now seen corresponding path program 1 times [2025-04-14 01:37:22,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:22,746 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727867603] [2025-04-14 01:37:22,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:37:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:22,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:37:22,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:22,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:22,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:22,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:22,899 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727867603] [2025-04-14 01:37:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727867603] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:22,899 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040234972] [2025-04-14 01:37:22,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:37:22,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:22,902 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) [2025-04-14 01:37:22,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-14 01:37:22,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:37:22,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:22,968 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:22,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:22,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:37:22,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:23,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:23,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040234972] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:23,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:37:23,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-04-14 01:37:23,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278141596] [2025-04-14 01:37:23,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:37:23,074 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:37:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:23,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:37:23,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:37:23,074 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:23,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2025-04-14 01:37:23,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:23,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:23,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:23,172 INFO L116 PetriNetUnfolderBase]: 81/154 cut-off events. [2025-04-14 01:37:23,172 INFO L117 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2025-04-14 01:37:23,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 154 events. 81/154 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 452 event pairs, 22 based on Foata normal form. 5/158 useless extension candidates. Maximal degree in co-relation 459. Up to 91 conditions per place. [2025-04-14 01:37:23,173 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 28 selfloop transitions, 4 changer transitions 3/35 dead transitions. [2025-04-14 01:37:23,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 35 transitions, 212 flow [2025-04-14 01:37:23,174 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:37:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:37:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2025-04-14 01:37:23,174 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5394736842105263 [2025-04-14 01:37:23,174 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 91 flow. Second operand 4 states and 41 transitions. [2025-04-14 01:37:23,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 35 transitions, 212 flow [2025-04-14 01:37:23,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 35 transitions, 202 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-14 01:37:23,176 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 112 flow [2025-04-14 01:37:23,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2025-04-14 01:37:23,177 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2025-04-14 01:37:23,177 INFO L485 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 112 flow [2025-04-14 01:37:23,177 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2025-04-14 01:37:23,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:23,177 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:23,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-14 01:37:23,381 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:23,381 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:23,382 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1981580065, now seen corresponding path program 2 times [2025-04-14 01:37:23,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:23,382 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244285737] [2025-04-14 01:37:23,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:37:23,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:23,388 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:23,416 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:23,416 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:23,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:23,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:23,658 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244285737] [2025-04-14 01:37:23,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244285737] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:23,658 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935011592] [2025-04-14 01:37:23,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:37:23,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:23,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:23,660 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) [2025-04-14 01:37:23,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-14 01:37:23,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:23,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:23,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:23,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:23,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:37:23,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:23,823 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 01:37:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935011592] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:37:23,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-14 01:37:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2025-04-14 01:37:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726194550] [2025-04-14 01:37:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:37:23,824 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:37:23,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:23,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:37:23,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-04-14 01:37:23,825 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:23,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2025-04-14 01:37:23,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:23,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:23,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:23,945 INFO L116 PetriNetUnfolderBase]: 90/174 cut-off events. [2025-04-14 01:37:23,946 INFO L117 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2025-04-14 01:37:23,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 174 events. 90/174 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 584 event pairs, 24 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 558. Up to 95 conditions per place. [2025-04-14 01:37:23,947 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 31 selfloop transitions, 7 changer transitions 9/47 dead transitions. [2025-04-14 01:37:23,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 307 flow [2025-04-14 01:37:23,948 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 01:37:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 01:37:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2025-04-14 01:37:23,948 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-04-14 01:37:23,948 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 112 flow. Second operand 6 states and 54 transitions. [2025-04-14 01:37:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 307 flow [2025-04-14 01:37:23,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 298 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-14 01:37:23,951 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 155 flow [2025-04-14 01:37:23,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=155, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2025-04-14 01:37:23,952 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2025-04-14 01:37:23,952 INFO L485 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 155 flow [2025-04-14 01:37:23,952 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2025-04-14 01:37:23,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:23,952 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:23,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-14 01:37:24,153 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:24,153 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:24,153 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1813426947, now seen corresponding path program 3 times [2025-04-14 01:37:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:24,153 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343867699] [2025-04-14 01:37:24,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:37:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:24,159 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:24,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:24,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:37:24,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:24,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:24,389 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343867699] [2025-04-14 01:37:24,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343867699] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:24,389 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810209343] [2025-04-14 01:37:24,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:37:24,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:24,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:24,391 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) [2025-04-14 01:37:24,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-14 01:37:24,430 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:24,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:24,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:37:24,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:24,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:37:24,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:24,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:24,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810209343] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:24,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:24,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-04-14 01:37:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346210296] [2025-04-14 01:37:24,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:24,545 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:37:24,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:24,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:37:24,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:37:24,545 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:24,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 155 flow. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 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) [2025-04-14 01:37:24,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:24,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:24,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:24,778 INFO L116 PetriNetUnfolderBase]: 100/192 cut-off events. [2025-04-14 01:37:24,778 INFO L117 PetriNetUnfolderBase]: For 355/355 co-relation queries the response was YES. [2025-04-14 01:37:24,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 192 events. 100/192 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 601 event pairs, 33 based on Foata normal form. 5/196 useless extension candidates. Maximal degree in co-relation 712. Up to 119 conditions per place. [2025-04-14 01:37:24,786 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 30 selfloop transitions, 14 changer transitions 3/47 dead transitions. [2025-04-14 01:37:24,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 355 flow [2025-04-14 01:37:24,786 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 01:37:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 01:37:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2025-04-14 01:37:24,787 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2025-04-14 01:37:24,787 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 155 flow. Second operand 6 states and 50 transitions. [2025-04-14 01:37:24,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 47 transitions, 355 flow [2025-04-14 01:37:24,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 337 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-14 01:37:24,789 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 239 flow [2025-04-14 01:37:24,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2025-04-14 01:37:24,790 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2025-04-14 01:37:24,790 INFO L485 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 239 flow [2025-04-14 01:37:24,790 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 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) [2025-04-14 01:37:24,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:24,790 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:24,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-14 01:37:24,990 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:24,991 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:24,991 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1066877026, now seen corresponding path program 2 times [2025-04-14 01:37:24,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:24,991 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552770278] [2025-04-14 01:37:24,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:37:24,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:24,999 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:25,009 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:25,009 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:25,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:25,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:25,080 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552770278] [2025-04-14 01:37:25,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552770278] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:25,080 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081803633] [2025-04-14 01:37:25,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:37:25,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:25,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:25,084 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) [2025-04-14 01:37:25,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-14 01:37:25,124 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:25,138 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:25,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:25,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:25,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:37:25,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:25,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:25,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081803633] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:25,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:37:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-04-14 01:37:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306918537] [2025-04-14 01:37:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:37:25,194 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:37:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:25,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:37:25,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:37:25,195 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:25,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2025-04-14 01:37:25,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:25,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:25,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:25,275 INFO L116 PetriNetUnfolderBase]: 106/202 cut-off events. [2025-04-14 01:37:25,275 INFO L117 PetriNetUnfolderBase]: For 543/543 co-relation queries the response was YES. [2025-04-14 01:37:25,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 202 events. 106/202 cut-off events. For 543/543 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 653 event pairs, 30 based on Foata normal form. 4/206 useless extension candidates. Maximal degree in co-relation 853. Up to 140 conditions per place. [2025-04-14 01:37:25,277 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 33 selfloop transitions, 8 changer transitions 3/44 dead transitions. [2025-04-14 01:37:25,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 388 flow [2025-04-14 01:37:25,278 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:37:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:37:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-04-14 01:37:25,279 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2025-04-14 01:37:25,279 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 239 flow. Second operand 4 states and 40 transitions. [2025-04-14 01:37:25,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 388 flow [2025-04-14 01:37:25,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 373 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-14 01:37:25,285 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 268 flow [2025-04-14 01:37:25,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2025-04-14 01:37:25,286 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2025-04-14 01:37:25,286 INFO L485 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 268 flow [2025-04-14 01:37:25,286 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2025-04-14 01:37:25,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:25,286 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:25,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-14 01:37:25,486 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:25,487 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:25,487 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:25,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1951103872, now seen corresponding path program 3 times [2025-04-14 01:37:25,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:25,487 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154798370] [2025-04-14 01:37:25,487 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:37:25,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:25,495 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:25,503 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:25,504 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:37:25,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:25,572 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154798370] [2025-04-14 01:37:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154798370] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:25,572 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143864970] [2025-04-14 01:37:25,572 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:37:25,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:25,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:25,575 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) [2025-04-14 01:37:25,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-14 01:37:25,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:25,644 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:25,644 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:37:25,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:25,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:37:25,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:25,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:25,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143864970] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:25,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:25,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-04-14 01:37:25,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898172120] [2025-04-14 01:37:25,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:25,712 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-14 01:37:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:25,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-14 01:37:25,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-04-14 01:37:25,712 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:25,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2025-04-14 01:37:25,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:25,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:25,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:25,824 INFO L116 PetriNetUnfolderBase]: 107/199 cut-off events. [2025-04-14 01:37:25,825 INFO L117 PetriNetUnfolderBase]: For 615/615 co-relation queries the response was YES. [2025-04-14 01:37:25,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 199 events. 107/199 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 639 event pairs, 31 based on Foata normal form. 4/202 useless extension candidates. Maximal degree in co-relation 871. Up to 136 conditions per place. [2025-04-14 01:37:25,827 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 30 selfloop transitions, 13 changer transitions 3/46 dead transitions. [2025-04-14 01:37:25,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 422 flow [2025-04-14 01:37:25,827 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:37:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:37:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2025-04-14 01:37:25,828 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2025-04-14 01:37:25,828 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 268 flow. Second operand 5 states and 44 transitions. [2025-04-14 01:37:25,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 422 flow [2025-04-14 01:37:25,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:37:25,832 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 308 flow [2025-04-14 01:37:25,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2025-04-14 01:37:25,832 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2025-04-14 01:37:25,832 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 308 flow [2025-04-14 01:37:25,832 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2025-04-14 01:37:25,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:25,832 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:25,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-14 01:37:26,033 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:26,033 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:26,034 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1680163623, now seen corresponding path program 4 times [2025-04-14 01:37:26,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:26,034 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320876235] [2025-04-14 01:37:26,034 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:37:26,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:26,039 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:37:26,044 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:37:26,045 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:37:26,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:26,103 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320876235] [2025-04-14 01:37:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320876235] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:37:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:37:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 01:37:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489056540] [2025-04-14 01:37:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:37:26,104 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:37:26,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:26,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:37:26,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:37:26,104 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:26,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2025-04-14 01:37:26,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:26,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:26,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:26,208 INFO L116 PetriNetUnfolderBase]: 95/168 cut-off events. [2025-04-14 01:37:26,209 INFO L117 PetriNetUnfolderBase]: For 738/738 co-relation queries the response was YES. [2025-04-14 01:37:26,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 168 events. 95/168 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 472 event pairs, 18 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 805. Up to 89 conditions per place. [2025-04-14 01:37:26,210 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 15 changer transitions 3/52 dead transitions. [2025-04-14 01:37:26,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 514 flow [2025-04-14 01:37:26,211 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 01:37:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 01:37:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 46 transitions. [2025-04-14 01:37:26,211 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2025-04-14 01:37:26,211 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 308 flow. Second operand 6 states and 46 transitions. [2025-04-14 01:37:26,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 514 flow [2025-04-14 01:37:26,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 468 flow, removed 11 selfloop flow, removed 4 redundant places. [2025-04-14 01:37:26,214 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 348 flow [2025-04-14 01:37:26,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2025-04-14 01:37:26,215 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2025-04-14 01:37:26,215 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 348 flow [2025-04-14 01:37:26,215 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2025-04-14 01:37:26,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:26,215 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:26,215 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-14 01:37:26,215 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:26,215 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1884007733, now seen corresponding path program 1 times [2025-04-14 01:37:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:26,215 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203835119] [2025-04-14 01:37:26,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:37:26,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:26,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 01:37:26,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:37:26,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:26,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:26,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:26,583 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203835119] [2025-04-14 01:37:26,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203835119] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:26,583 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674266100] [2025-04-14 01:37:26,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:37:26,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:26,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:26,589 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) [2025-04-14 01:37:26,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-14 01:37:26,635 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 01:37:26,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:37:26,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:26,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:26,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-04-14 01:37:26,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:26,713 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:37:26,830 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:37:26,831 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2025-04-14 01:37:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:37:26,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:27,141 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 116 [2025-04-14 01:37:27,254 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:37:27,254 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 765 treesize of output 645 [2025-04-14 01:37:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:37:46,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674266100] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:46,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:46,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 17 [2025-04-14 01:37:46,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990365547] [2025-04-14 01:37:46,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:46,326 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:37:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:46,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:37:46,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:37:46,326 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:46,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 348 flow. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 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) [2025-04-14 01:37:46,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:46,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:46,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:47,655 INFO L116 PetriNetUnfolderBase]: 227/395 cut-off events. [2025-04-14 01:37:47,655 INFO L117 PetriNetUnfolderBase]: For 1264/1264 co-relation queries the response was YES. [2025-04-14 01:37:47,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 395 events. 227/395 cut-off events. For 1264/1264 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1445 event pairs, 7 based on Foata normal form. 33/426 useless extension candidates. Maximal degree in co-relation 1914. Up to 185 conditions per place. [2025-04-14 01:37:47,658 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 44 selfloop transitions, 21 changer transitions 66/131 dead transitions. [2025-04-14 01:37:47,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 131 transitions, 1265 flow [2025-04-14 01:37:47,658 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 01:37:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 01:37:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 149 transitions. [2025-04-14 01:37:47,659 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37343358395989973 [2025-04-14 01:37:47,659 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 348 flow. Second operand 21 states and 149 transitions. [2025-04-14 01:37:47,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 131 transitions, 1265 flow [2025-04-14 01:37:47,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 131 transitions, 1221 flow, removed 22 selfloop flow, removed 1 redundant places. [2025-04-14 01:37:47,667 INFO L231 Difference]: Finished difference. Result has 76 places, 46 transitions, 491 flow [2025-04-14 01:37:47,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=491, PETRI_PLACES=76, PETRI_TRANSITIONS=46} [2025-04-14 01:37:47,667 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2025-04-14 01:37:47,667 INFO L485 AbstractCegarLoop]: Abstraction has has 76 places, 46 transitions, 491 flow [2025-04-14 01:37:47,669 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 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) [2025-04-14 01:37:47,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:47,670 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:47,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-14 01:37:47,870 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:47,870 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:47,871 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1012674999, now seen corresponding path program 2 times [2025-04-14 01:37:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:47,871 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536035882] [2025-04-14 01:37:47,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:37:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:47,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:37:47,892 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:37:47,892 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:47,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:48,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:48,180 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536035882] [2025-04-14 01:37:48,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536035882] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:48,180 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664824452] [2025-04-14 01:37:48,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:37:48,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:48,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:48,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:37:48,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-14 01:37:48,220 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:37:48,278 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:37:48,278 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:48,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:48,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:37:48,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-14 01:37:48,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-14 01:37:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664824452] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:48,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:48,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2025-04-14 01:37:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008639285] [2025-04-14 01:37:48,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:48,447 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:37:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:48,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:37:48,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:37:48,448 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:48,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 46 transitions, 491 flow. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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) [2025-04-14 01:37:48,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:48,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:49,288 INFO L116 PetriNetUnfolderBase]: 208/350 cut-off events. [2025-04-14 01:37:49,288 INFO L117 PetriNetUnfolderBase]: For 2396/2396 co-relation queries the response was YES. [2025-04-14 01:37:49,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 350 events. 208/350 cut-off events. For 2396/2396 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1183 event pairs, 12 based on Foata normal form. 42/392 useless extension candidates. Maximal degree in co-relation 2045. Up to 172 conditions per place. [2025-04-14 01:37:49,293 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 76 selfloop transitions, 32 changer transitions 0/108 dead transitions. [2025-04-14 01:37:49,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 1253 flow [2025-04-14 01:37:49,293 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:37:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:37:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 97 transitions. [2025-04-14 01:37:49,294 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2025-04-14 01:37:49,294 INFO L175 Difference]: Start difference. First operand has 76 places, 46 transitions, 491 flow. Second operand 12 states and 97 transitions. [2025-04-14 01:37:49,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 1253 flow [2025-04-14 01:37:49,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 1086 flow, removed 65 selfloop flow, removed 13 redundant places. [2025-04-14 01:37:49,304 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 670 flow [2025-04-14 01:37:49,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=670, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2025-04-14 01:37:49,305 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2025-04-14 01:37:49,305 INFO L485 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 670 flow [2025-04-14 01:37:49,305 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 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) [2025-04-14 01:37:49,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:49,305 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:49,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-14 01:37:49,506 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:49,506 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:49,506 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1411898078, now seen corresponding path program 3 times [2025-04-14 01:37:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:49,507 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268348062] [2025-04-14 01:37:49,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:37:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:49,512 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:37:49,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:49,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:37:49,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:37:50,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:50,615 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268348062] [2025-04-14 01:37:50,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268348062] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:50,615 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314070780] [2025-04-14 01:37:50,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:37:50,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:50,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:50,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:37:50,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-14 01:37:50,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:37:50,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:50,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:37:50,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:50,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-04-14 01:37:50,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:50,811 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:37:50,812 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2025-04-14 01:37:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:50,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:50,974 INFO L325 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-04-14 01:37:50,974 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-04-14 01:37:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:51,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314070780] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:51,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:51,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 17 [2025-04-14 01:37:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557476351] [2025-04-14 01:37:51,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:51,120 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:37:51,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:51,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:37:51,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:37:51,121 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:51,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 670 flow. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 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) [2025-04-14 01:37:51,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:51,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:51,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:51,954 INFO L116 PetriNetUnfolderBase]: 541/907 cut-off events. [2025-04-14 01:37:51,954 INFO L117 PetriNetUnfolderBase]: For 4921/4921 co-relation queries the response was YES. [2025-04-14 01:37:51,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5298 conditions, 907 events. 541/907 cut-off events. For 4921/4921 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3631 event pairs, 39 based on Foata normal form. 2/909 useless extension candidates. Maximal degree in co-relation 4845. Up to 436 conditions per place. [2025-04-14 01:37:51,961 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 114 selfloop transitions, 83 changer transitions 2/199 dead transitions. [2025-04-14 01:37:51,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 199 transitions, 2334 flow [2025-04-14 01:37:51,962 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 01:37:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 01:37:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2025-04-14 01:37:51,963 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40601503759398494 [2025-04-14 01:37:51,963 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 670 flow. Second operand 21 states and 162 transitions. [2025-04-14 01:37:51,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 199 transitions, 2334 flow [2025-04-14 01:37:51,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 199 transitions, 2010 flow, removed 132 selfloop flow, removed 5 redundant places. [2025-04-14 01:37:51,976 INFO L231 Difference]: Finished difference. Result has 89 places, 127 transitions, 1414 flow [2025-04-14 01:37:51,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1414, PETRI_PLACES=89, PETRI_TRANSITIONS=127} [2025-04-14 01:37:51,976 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2025-04-14 01:37:51,976 INFO L485 AbstractCegarLoop]: Abstraction has has 89 places, 127 transitions, 1414 flow [2025-04-14 01:37:51,976 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 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) [2025-04-14 01:37:51,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:51,977 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:51,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-14 01:37:52,181 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-04-14 01:37:52,181 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:52,181 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 432467550, now seen corresponding path program 4 times [2025-04-14 01:37:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:52,182 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018593858] [2025-04-14 01:37:52,182 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:37:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:52,186 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:37:52,213 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:52,213 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:37:52,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:37:53,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:53,054 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018593858] [2025-04-14 01:37:53,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018593858] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:53,054 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066338222] [2025-04-14 01:37:53,054 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:37:53,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:53,056 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:37:53,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-14 01:37:53,092 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:37:53,108 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:53,109 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:37:53,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:53,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 01:37:53,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:53,199 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:37:53,200 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 45 [2025-04-14 01:37:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:53,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:53,364 INFO L325 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-04-14 01:37:53,365 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-04-14 01:37:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:53,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066338222] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:53,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:53,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2025-04-14 01:37:53,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143947858] [2025-04-14 01:37:53,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:53,474 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:37:53,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:53,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:37:53,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:37:53,475 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:53,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 127 transitions, 1414 flow. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 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) [2025-04-14 01:37:53,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:53,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:53,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:54,125 INFO L116 PetriNetUnfolderBase]: 969/1646 cut-off events. [2025-04-14 01:37:54,125 INFO L117 PetriNetUnfolderBase]: For 8517/8517 co-relation queries the response was YES. [2025-04-14 01:37:54,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9214 conditions, 1646 events. 969/1646 cut-off events. For 8517/8517 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8105 event pairs, 75 based on Foata normal form. 2/1648 useless extension candidates. Maximal degree in co-relation 8291. Up to 765 conditions per place. [2025-04-14 01:37:54,138 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 174 selfloop transitions, 130 changer transitions 2/306 dead transitions. [2025-04-14 01:37:54,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 306 transitions, 3584 flow [2025-04-14 01:37:54,139 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 01:37:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 01:37:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 182 transitions. [2025-04-14 01:37:54,140 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2025-04-14 01:37:54,140 INFO L175 Difference]: Start difference. First operand has 89 places, 127 transitions, 1414 flow. Second operand 21 states and 182 transitions. [2025-04-14 01:37:54,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 306 transitions, 3584 flow [2025-04-14 01:37:54,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 306 transitions, 3339 flow, removed 119 selfloop flow, removed 3 redundant places. [2025-04-14 01:37:54,166 INFO L231 Difference]: Finished difference. Result has 113 places, 209 transitions, 2520 flow [2025-04-14 01:37:54,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2520, PETRI_PLACES=113, PETRI_TRANSITIONS=209} [2025-04-14 01:37:54,167 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 93 predicate places. [2025-04-14 01:37:54,167 INFO L485 AbstractCegarLoop]: Abstraction has has 113 places, 209 transitions, 2520 flow [2025-04-14 01:37:54,167 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 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) [2025-04-14 01:37:54,167 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:54,167 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:54,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-14 01:37:54,368 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-14 01:37:54,368 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:54,368 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash 360927172, now seen corresponding path program 5 times [2025-04-14 01:37:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:54,369 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004445400] [2025-04-14 01:37:54,369 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:37:54,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:54,374 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:37:54,391 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:54,391 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:54,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:37:55,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:55,567 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004445400] [2025-04-14 01:37:55,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004445400] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:55,567 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339578204] [2025-04-14 01:37:55,567 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:37:55,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:55,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:37:55,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-14 01:37:55,605 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:37:55,712 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:55,712 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:37:55,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:55,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-14 01:37:55,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:55,840 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:37:55,840 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2025-04-14 01:37:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:55,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:56,013 INFO L325 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-04-14 01:37:56,013 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-04-14 01:37:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339578204] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:56,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:56,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2025-04-14 01:37:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091240902] [2025-04-14 01:37:56,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:56,181 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:37:56,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:56,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:37:56,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:37:56,182 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:56,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 209 transitions, 2520 flow. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 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) [2025-04-14 01:37:56,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:56,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:56,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:57,050 INFO L116 PetriNetUnfolderBase]: 1301/2206 cut-off events. [2025-04-14 01:37:57,051 INFO L117 PetriNetUnfolderBase]: For 12872/12872 co-relation queries the response was YES. [2025-04-14 01:37:57,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13021 conditions, 2206 events. 1301/2206 cut-off events. For 12872/12872 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11523 event pairs, 134 based on Foata normal form. 3/2209 useless extension candidates. Maximal degree in co-relation 12967. Up to 1516 conditions per place. [2025-04-14 01:37:57,076 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 219 selfloop transitions, 99 changer transitions 1/319 dead transitions. [2025-04-14 01:37:57,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 319 transitions, 4231 flow [2025-04-14 01:37:57,077 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 01:37:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 01:37:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 139 transitions. [2025-04-14 01:37:57,078 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3850415512465374 [2025-04-14 01:37:57,078 INFO L175 Difference]: Start difference. First operand has 113 places, 209 transitions, 2520 flow. Second operand 19 states and 139 transitions. [2025-04-14 01:37:57,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 319 transitions, 4231 flow [2025-04-14 01:37:57,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 319 transitions, 3876 flow, removed 152 selfloop flow, removed 9 redundant places. [2025-04-14 01:37:57,133 INFO L231 Difference]: Finished difference. Result has 126 places, 262 transitions, 3237 flow [2025-04-14 01:37:57,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3237, PETRI_PLACES=126, PETRI_TRANSITIONS=262} [2025-04-14 01:37:57,134 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2025-04-14 01:37:57,134 INFO L485 AbstractCegarLoop]: Abstraction has has 126 places, 262 transitions, 3237 flow [2025-04-14 01:37:57,134 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 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) [2025-04-14 01:37:57,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:57,134 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:57,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-14 01:37:57,334 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-14 01:37:57,335 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:57,335 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:57,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1621621636, now seen corresponding path program 6 times [2025-04-14 01:37:57,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:57,335 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829025697] [2025-04-14 01:37:57,335 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:37:57,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:57,340 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 01:37:57,350 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:57,350 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:37:57,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:37:57,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:57,901 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829025697] [2025-04-14 01:37:57,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829025697] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:57,901 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792315683] [2025-04-14 01:37:57,901 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:37:57,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:57,904 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:37:57,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-14 01:37:57,940 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 01:37:57,969 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:37:57,969 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:37:57,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:57,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-04-14 01:37:57,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:58,112 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:37:58,113 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2025-04-14 01:37:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:37:58,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:58,261 INFO L325 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-04-14 01:37:58,261 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-04-14 01:37:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792315683] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:58,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:58,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 17 [2025-04-14 01:37:58,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033187443] [2025-04-14 01:37:58,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:58,379 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:37:58,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:58,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:37:58,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:37:58,379 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:58,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 262 transitions, 3237 flow. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 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) [2025-04-14 01:37:58,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:58,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:58,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:37:59,234 INFO L116 PetriNetUnfolderBase]: 1747/2963 cut-off events. [2025-04-14 01:37:59,234 INFO L117 PetriNetUnfolderBase]: For 17468/17468 co-relation queries the response was YES. [2025-04-14 01:37:59,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17374 conditions, 2963 events. 1747/2963 cut-off events. For 17468/17468 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16519 event pairs, 234 based on Foata normal form. 3/2966 useless extension candidates. Maximal degree in co-relation 17315. Up to 2058 conditions per place. [2025-04-14 01:37:59,259 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 290 selfloop transitions, 112 changer transitions 2/404 dead transitions. [2025-04-14 01:37:59,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 404 transitions, 5447 flow [2025-04-14 01:37:59,260 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 01:37:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 01:37:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 150 transitions. [2025-04-14 01:37:59,261 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2025-04-14 01:37:59,261 INFO L175 Difference]: Start difference. First operand has 126 places, 262 transitions, 3237 flow. Second operand 20 states and 150 transitions. [2025-04-14 01:37:59,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 404 transitions, 5447 flow [2025-04-14 01:37:59,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 404 transitions, 5228 flow, removed 91 selfloop flow, removed 8 redundant places. [2025-04-14 01:37:59,315 INFO L231 Difference]: Finished difference. Result has 145 places, 338 transitions, 4423 flow [2025-04-14 01:37:59,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3036, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4423, PETRI_PLACES=145, PETRI_TRANSITIONS=338} [2025-04-14 01:37:59,315 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2025-04-14 01:37:59,316 INFO L485 AbstractCegarLoop]: Abstraction has has 145 places, 338 transitions, 4423 flow [2025-04-14 01:37:59,316 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 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) [2025-04-14 01:37:59,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:37:59,316 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:37:59,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-14 01:37:59,516 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-14 01:37:59,516 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:37:59,517 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:37:59,517 INFO L85 PathProgramCache]: Analyzing trace with hash 527873016, now seen corresponding path program 7 times [2025-04-14 01:37:59,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:37:59,517 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864194396] [2025-04-14 01:37:59,517 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:37:59,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:37:59,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:37:59,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:37:59,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:59,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:59,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:37:59,653 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864194396] [2025-04-14 01:37:59,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864194396] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:37:59,653 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407890406] [2025-04-14 01:37:59,653 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:37:59,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:37:59,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:37:59,655 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:37:59,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-14 01:37:59,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:37:59,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:37:59,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:37:59,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:37:59,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:37:59,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:37:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:59,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:37:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:37:59,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407890406] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:37:59,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:37:59,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-04-14 01:37:59,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130465041] [2025-04-14 01:37:59,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:37:59,867 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:37:59,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:37:59,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:37:59,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:37:59,868 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:37:59,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 338 transitions, 4423 flow. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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) [2025-04-14 01:37:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:37:59,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:37:59,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:01,186 INFO L116 PetriNetUnfolderBase]: 2114/4024 cut-off events. [2025-04-14 01:38:01,187 INFO L117 PetriNetUnfolderBase]: For 29488/29488 co-relation queries the response was YES. [2025-04-14 01:38:01,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23854 conditions, 4024 events. 2114/4024 cut-off events. For 29488/29488 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27640 event pairs, 253 based on Foata normal form. 19/4043 useless extension candidates. Maximal degree in co-relation 23786. Up to 1279 conditions per place. [2025-04-14 01:38:01,228 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 416 selfloop transitions, 366 changer transitions 7/789 dead transitions. [2025-04-14 01:38:01,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 789 transitions, 11406 flow [2025-04-14 01:38:01,228 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-14 01:38:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-14 01:38:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 224 transitions. [2025-04-14 01:38:01,229 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-04-14 01:38:01,229 INFO L175 Difference]: Start difference. First operand has 145 places, 338 transitions, 4423 flow. Second operand 32 states and 224 transitions. [2025-04-14 01:38:01,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 789 transitions, 11406 flow [2025-04-14 01:38:01,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 789 transitions, 10647 flow, removed 363 selfloop flow, removed 7 redundant places. [2025-04-14 01:38:01,338 INFO L231 Difference]: Finished difference. Result has 181 places, 601 transitions, 8504 flow [2025-04-14 01:38:01,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8504, PETRI_PLACES=181, PETRI_TRANSITIONS=601} [2025-04-14 01:38:01,338 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 161 predicate places. [2025-04-14 01:38:01,339 INFO L485 AbstractCegarLoop]: Abstraction has has 181 places, 601 transitions, 8504 flow [2025-04-14 01:38:01,339 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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) [2025-04-14 01:38:01,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:01,339 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:01,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-14 01:38:01,539 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-14 01:38:01,540 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:01,540 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1900045790, now seen corresponding path program 8 times [2025-04-14 01:38:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:01,540 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851599128] [2025-04-14 01:38:01,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:38:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:01,544 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:01,552 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:01,552 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:38:01,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:01,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:01,658 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851599128] [2025-04-14 01:38:01,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851599128] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:01,658 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130601536] [2025-04-14 01:38:01,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:38:01,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:01,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:01,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-14 01:38:01,699 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:01,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:01,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:38:01,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:01,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:01,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:01,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:01,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130601536] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:01,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:01,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-04-14 01:38:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914436660] [2025-04-14 01:38:01,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:01,849 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:38:01,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:01,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:38:01,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:38:01,850 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:01,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 601 transitions, 8504 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2025-04-14 01:38:01,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:01,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:01,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:03,021 INFO L116 PetriNetUnfolderBase]: 2089/4077 cut-off events. [2025-04-14 01:38:03,021 INFO L117 PetriNetUnfolderBase]: For 37271/37271 co-relation queries the response was YES. [2025-04-14 01:38:03,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26103 conditions, 4077 events. 2089/4077 cut-off events. For 37271/37271 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29097 event pairs, 232 based on Foata normal form. 48/4125 useless extension candidates. Maximal degree in co-relation 26025. Up to 1281 conditions per place. [2025-04-14 01:38:03,059 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 502 selfloop transitions, 257 changer transitions 19/778 dead transitions. [2025-04-14 01:38:03,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 778 transitions, 12203 flow [2025-04-14 01:38:03,060 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-14 01:38:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-14 01:38:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 114 transitions. [2025-04-14 01:38:03,060 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-04-14 01:38:03,061 INFO L175 Difference]: Start difference. First operand has 181 places, 601 transitions, 8504 flow. Second operand 16 states and 114 transitions. [2025-04-14 01:38:03,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 778 transitions, 12203 flow [2025-04-14 01:38:03,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 778 transitions, 11538 flow, removed 253 selfloop flow, removed 4 redundant places. [2025-04-14 01:38:03,291 INFO L231 Difference]: Finished difference. Result has 194 places, 621 transitions, 8808 flow [2025-04-14 01:38:03,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7850, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8808, PETRI_PLACES=194, PETRI_TRANSITIONS=621} [2025-04-14 01:38:03,292 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2025-04-14 01:38:03,292 INFO L485 AbstractCegarLoop]: Abstraction has has 194 places, 621 transitions, 8808 flow [2025-04-14 01:38:03,292 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 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) [2025-04-14 01:38:03,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:03,292 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:03,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-14 01:38:03,493 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-14 01:38:03,493 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:03,493 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash 114387338, now seen corresponding path program 9 times [2025-04-14 01:38:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:03,494 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170649626] [2025-04-14 01:38:03,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:38:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:03,500 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:38:03,516 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:03,516 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:38:03,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:03,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:03,722 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170649626] [2025-04-14 01:38:03,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170649626] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:03,722 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628366836] [2025-04-14 01:38:03,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:38:03,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:03,724 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:03,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-14 01:38:03,781 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:38:03,853 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:03,854 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:38:03,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:03,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:03,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:03,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:04,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628366836] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:04,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:04,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2025-04-14 01:38:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96931766] [2025-04-14 01:38:04,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:04,106 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-14 01:38:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:04,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-14 01:38:04,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2025-04-14 01:38:04,107 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:04,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 621 transitions, 8808 flow. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 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) [2025-04-14 01:38:04,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:04,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:04,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:07,675 INFO L116 PetriNetUnfolderBase]: 2704/5219 cut-off events. [2025-04-14 01:38:07,675 INFO L117 PetriNetUnfolderBase]: For 62896/62896 co-relation queries the response was YES. [2025-04-14 01:38:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36015 conditions, 5219 events. 2704/5219 cut-off events. For 62896/62896 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38831 event pairs, 477 based on Foata normal form. 150/5369 useless extension candidates. Maximal degree in co-relation 35934. Up to 1967 conditions per place. [2025-04-14 01:38:07,721 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 406 selfloop transitions, 698 changer transitions 3/1107 dead transitions. [2025-04-14 01:38:07,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1107 transitions, 18475 flow [2025-04-14 01:38:07,721 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-14 01:38:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-14 01:38:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 254 transitions. [2025-04-14 01:38:07,723 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3713450292397661 [2025-04-14 01:38:07,723 INFO L175 Difference]: Start difference. First operand has 194 places, 621 transitions, 8808 flow. Second operand 36 states and 254 transitions. [2025-04-14 01:38:07,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1107 transitions, 18475 flow [2025-04-14 01:38:08,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1107 transitions, 16028 flow, removed 647 selfloop flow, removed 17 redundant places. [2025-04-14 01:38:08,148 INFO L231 Difference]: Finished difference. Result has 227 places, 938 transitions, 14374 flow [2025-04-14 01:38:08,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7465, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14374, PETRI_PLACES=227, PETRI_TRANSITIONS=938} [2025-04-14 01:38:08,148 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2025-04-14 01:38:08,149 INFO L485 AbstractCegarLoop]: Abstraction has has 227 places, 938 transitions, 14374 flow [2025-04-14 01:38:08,149 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 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) [2025-04-14 01:38:08,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:08,149 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:08,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-14 01:38:08,349 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:08,349 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:08,350 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash 753629696, now seen corresponding path program 10 times [2025-04-14 01:38:08,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:08,350 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359356062] [2025-04-14 01:38:08,350 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:38:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:08,355 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:08,360 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:08,361 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:38:08,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:08,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:08,462 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359356062] [2025-04-14 01:38:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359356062] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:08,462 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493233397] [2025-04-14 01:38:08,462 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:38:08,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:08,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:08,465 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:08,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-14 01:38:08,507 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:08,522 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:08,523 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:38:08,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:08,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:08,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:08,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:08,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493233397] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:08,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:08,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-04-14 01:38:08,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146763127] [2025-04-14 01:38:08,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:08,669 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:38:08,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:08,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:38:08,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:38:08,670 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:08,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 938 transitions, 14374 flow. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 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) [2025-04-14 01:38:08,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:08,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:08,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:11,066 INFO L116 PetriNetUnfolderBase]: 2890/5582 cut-off events. [2025-04-14 01:38:11,067 INFO L117 PetriNetUnfolderBase]: For 56333/56333 co-relation queries the response was YES. [2025-04-14 01:38:11,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38851 conditions, 5582 events. 2890/5582 cut-off events. For 56333/56333 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 42340 event pairs, 409 based on Foata normal form. 10/5592 useless extension candidates. Maximal degree in co-relation 38762. Up to 1974 conditions per place. [2025-04-14 01:38:11,112 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 648 selfloop transitions, 525 changer transitions 14/1187 dead transitions. [2025-04-14 01:38:11,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1187 transitions, 19974 flow [2025-04-14 01:38:11,112 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-14 01:38:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-14 01:38:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 221 transitions. [2025-04-14 01:38:11,113 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3230994152046784 [2025-04-14 01:38:11,113 INFO L175 Difference]: Start difference. First operand has 227 places, 938 transitions, 14374 flow. Second operand 36 states and 221 transitions. [2025-04-14 01:38:11,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1187 transitions, 19974 flow [2025-04-14 01:38:11,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1187 transitions, 18525 flow, removed 504 selfloop flow, removed 7 redundant places. [2025-04-14 01:38:11,613 INFO L231 Difference]: Finished difference. Result has 268 places, 1032 transitions, 16023 flow [2025-04-14 01:38:11,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13261, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16023, PETRI_PLACES=268, PETRI_TRANSITIONS=1032} [2025-04-14 01:38:11,614 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2025-04-14 01:38:11,614 INFO L485 AbstractCegarLoop]: Abstraction has has 268 places, 1032 transitions, 16023 flow [2025-04-14 01:38:11,614 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 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) [2025-04-14 01:38:11,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:11,614 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:11,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-14 01:38:11,815 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:11,815 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:11,815 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash -975417638, now seen corresponding path program 11 times [2025-04-14 01:38:11,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:11,815 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937222748] [2025-04-14 01:38:11,815 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:38:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:11,821 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:11,829 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:11,829 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:38:11,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:11,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:11,948 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937222748] [2025-04-14 01:38:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937222748] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:11,948 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56013292] [2025-04-14 01:38:11,948 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:38:11,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:11,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:11,952 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:11,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-14 01:38:12,006 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:12,168 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:12,168 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:38:12,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:12,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:12,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:12,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:12,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56013292] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:12,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:12,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-04-14 01:38:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783745015] [2025-04-14 01:38:12,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:12,366 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:38:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:12,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:38:12,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:38:12,366 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:12,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 1032 transitions, 16023 flow. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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) [2025-04-14 01:38:12,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:12,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:12,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:14,675 INFO L116 PetriNetUnfolderBase]: 2981/5749 cut-off events. [2025-04-14 01:38:14,676 INFO L117 PetriNetUnfolderBase]: For 66713/66713 co-relation queries the response was YES. [2025-04-14 01:38:14,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41477 conditions, 5749 events. 2981/5749 cut-off events. For 66713/66713 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 43763 event pairs, 422 based on Foata normal form. 14/5763 useless extension candidates. Maximal degree in co-relation 41377. Up to 2065 conditions per place. [2025-04-14 01:38:14,732 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 691 selfloop transitions, 547 changer transitions 11/1249 dead transitions. [2025-04-14 01:38:14,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1249 transitions, 21492 flow [2025-04-14 01:38:14,733 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-04-14 01:38:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-04-14 01:38:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 254 transitions. [2025-04-14 01:38:14,734 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3038277511961722 [2025-04-14 01:38:14,734 INFO L175 Difference]: Start difference. First operand has 268 places, 1032 transitions, 16023 flow. Second operand 44 states and 254 transitions. [2025-04-14 01:38:14,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1249 transitions, 21492 flow [2025-04-14 01:38:15,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1249 transitions, 20529 flow, removed 288 selfloop flow, removed 11 redundant places. [2025-04-14 01:38:15,420 INFO L231 Difference]: Finished difference. Result has 310 places, 1096 transitions, 18061 flow [2025-04-14 01:38:15,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=15031, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=18061, PETRI_PLACES=310, PETRI_TRANSITIONS=1096} [2025-04-14 01:38:15,421 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 290 predicate places. [2025-04-14 01:38:15,421 INFO L485 AbstractCegarLoop]: Abstraction has has 310 places, 1096 transitions, 18061 flow [2025-04-14 01:38:15,421 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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) [2025-04-14 01:38:15,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:15,422 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:15,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-04-14 01:38:15,622 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:15,622 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:15,623 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1573159984, now seen corresponding path program 12 times [2025-04-14 01:38:15,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:15,623 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843088872] [2025-04-14 01:38:15,623 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:38:15,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:15,629 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:15,636 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:15,636 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:38:15,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:15,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:15,760 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843088872] [2025-04-14 01:38:15,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843088872] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:15,760 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076152782] [2025-04-14 01:38:15,760 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:38:15,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:15,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:15,762 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:15,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-14 01:38:15,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:15,819 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:15,820 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:38:15,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:15,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:15,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:15,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076152782] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:15,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:15,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-04-14 01:38:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296932341] [2025-04-14 01:38:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:15,942 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:38:15,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:15,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:38:15,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:38:15,943 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:15,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 1096 transitions, 18061 flow. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2025-04-14 01:38:15,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:15,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:15,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:20,790 INFO L116 PetriNetUnfolderBase]: 3304/6399 cut-off events. [2025-04-14 01:38:20,791 INFO L117 PetriNetUnfolderBase]: For 85753/85753 co-relation queries the response was YES. [2025-04-14 01:38:20,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48226 conditions, 6399 events. 3304/6399 cut-off events. For 85753/85753 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 50068 event pairs, 500 based on Foata normal form. 13/6412 useless extension candidates. Maximal degree in co-relation 48115. Up to 2426 conditions per place. [2025-04-14 01:38:20,869 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 825 selfloop transitions, 573 changer transitions 20/1418 dead transitions. [2025-04-14 01:38:20,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1418 transitions, 25237 flow [2025-04-14 01:38:20,870 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-04-14 01:38:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-04-14 01:38:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 243 transitions. [2025-04-14 01:38:20,871 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3365650969529086 [2025-04-14 01:38:20,871 INFO L175 Difference]: Start difference. First operand has 310 places, 1096 transitions, 18061 flow. Second operand 38 states and 243 transitions. [2025-04-14 01:38:20,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1418 transitions, 25237 flow [2025-04-14 01:38:21,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1418 transitions, 24072 flow, removed 464 selfloop flow, removed 13 redundant places. [2025-04-14 01:38:21,934 INFO L231 Difference]: Finished difference. Result has 348 places, 1246 transitions, 21759 flow [2025-04-14 01:38:21,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=16984, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21759, PETRI_PLACES=348, PETRI_TRANSITIONS=1246} [2025-04-14 01:38:21,935 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2025-04-14 01:38:21,935 INFO L485 AbstractCegarLoop]: Abstraction has has 348 places, 1246 transitions, 21759 flow [2025-04-14 01:38:21,935 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2025-04-14 01:38:21,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:21,935 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:21,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-04-14 01:38:22,136 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:22,136 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:22,136 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash 635523320, now seen corresponding path program 13 times [2025-04-14 01:38:22,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:22,137 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476304099] [2025-04-14 01:38:22,137 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:38:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:22,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:38:22,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:22,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:38:22,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:22,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:22,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476304099] [2025-04-14 01:38:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476304099] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:22,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766093049] [2025-04-14 01:38:22,295 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:38:22,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:22,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:22,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-14 01:38:22,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:38:22,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:22,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:38:22,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:22,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:22,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:22,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766093049] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:22,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:22,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-04-14 01:38:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173126198] [2025-04-14 01:38:22,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:22,518 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:38:22,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:22,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:38:22,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:38:22,519 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:22,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1246 transitions, 21759 flow. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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) [2025-04-14 01:38:22,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:22,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:22,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:27,672 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:38:29,821 INFO L116 PetriNetUnfolderBase]: 3488/6787 cut-off events. [2025-04-14 01:38:29,821 INFO L117 PetriNetUnfolderBase]: For 103660/103660 co-relation queries the response was YES. [2025-04-14 01:38:29,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54017 conditions, 6787 events. 3488/6787 cut-off events. For 103660/103660 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 54030 event pairs, 527 based on Foata normal form. 20/6807 useless extension candidates. Maximal degree in co-relation 53889. Up to 2575 conditions per place. [2025-04-14 01:38:29,895 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 889 selfloop transitions, 616 changer transitions 18/1523 dead transitions. [2025-04-14 01:38:29,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1523 transitions, 28954 flow [2025-04-14 01:38:29,895 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-04-14 01:38:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-04-14 01:38:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 263 transitions. [2025-04-14 01:38:29,896 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3145933014354067 [2025-04-14 01:38:29,896 INFO L175 Difference]: Start difference. First operand has 348 places, 1246 transitions, 21759 flow. Second operand 44 states and 263 transitions. [2025-04-14 01:38:29,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1523 transitions, 28954 flow [2025-04-14 01:38:31,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1523 transitions, 27478 flow, removed 476 selfloop flow, removed 18 redundant places. [2025-04-14 01:38:31,491 INFO L231 Difference]: Finished difference. Result has 384 places, 1350 transitions, 24947 flow [2025-04-14 01:38:31,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=20290, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=24947, PETRI_PLACES=384, PETRI_TRANSITIONS=1350} [2025-04-14 01:38:31,493 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 364 predicate places. [2025-04-14 01:38:31,493 INFO L485 AbstractCegarLoop]: Abstraction has has 384 places, 1350 transitions, 24947 flow [2025-04-14 01:38:31,493 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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) [2025-04-14 01:38:31,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:31,494 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:31,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-04-14 01:38:31,694 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:31,694 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:31,695 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1425336482, now seen corresponding path program 14 times [2025-04-14 01:38:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:31,695 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522000305] [2025-04-14 01:38:31,695 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:38:31,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:31,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:31,717 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:31,718 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:38:31,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:31,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:31,835 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522000305] [2025-04-14 01:38:31,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522000305] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:31,835 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880132098] [2025-04-14 01:38:31,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:38:31,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:31,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:31,837 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:31,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-14 01:38:31,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:38:31,901 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:31,902 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:38:31,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:31,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:31,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:31,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880132098] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:32,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:32,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-04-14 01:38:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475858815] [2025-04-14 01:38:32,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:32,032 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:38:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:32,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:38:32,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:38:32,033 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:32,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1350 transitions, 24947 flow. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 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) [2025-04-14 01:38:32,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:32,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:32,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:36,783 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:38:40,859 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:38:43,592 INFO L116 PetriNetUnfolderBase]: 3659/7109 cut-off events. [2025-04-14 01:38:43,593 INFO L117 PetriNetUnfolderBase]: For 125697/125697 co-relation queries the response was YES. [2025-04-14 01:38:43,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59321 conditions, 7109 events. 3659/7109 cut-off events. For 125697/125697 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 57028 event pairs, 562 based on Foata normal form. 24/7133 useless extension candidates. Maximal degree in co-relation 59185. Up to 2742 conditions per place. [2025-04-14 01:38:43,676 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 940 selfloop transitions, 638 changer transitions 20/1598 dead transitions. [2025-04-14 01:38:43,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1598 transitions, 31832 flow [2025-04-14 01:38:43,677 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-04-14 01:38:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-04-14 01:38:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 253 transitions. [2025-04-14 01:38:43,678 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3026315789473684 [2025-04-14 01:38:43,678 INFO L175 Difference]: Start difference. First operand has 384 places, 1350 transitions, 24947 flow. Second operand 44 states and 253 transitions. [2025-04-14 01:38:43,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1598 transitions, 31832 flow [2025-04-14 01:38:45,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1598 transitions, 30367 flow, removed 510 selfloop flow, removed 23 redundant places. [2025-04-14 01:38:45,581 INFO L231 Difference]: Finished difference. Result has 416 places, 1437 transitions, 27815 flow [2025-04-14 01:38:45,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=23317, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=27815, PETRI_PLACES=416, PETRI_TRANSITIONS=1437} [2025-04-14 01:38:45,582 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 396 predicate places. [2025-04-14 01:38:45,583 INFO L485 AbstractCegarLoop]: Abstraction has has 416 places, 1437 transitions, 27815 flow [2025-04-14 01:38:45,583 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 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) [2025-04-14 01:38:45,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:38:45,583 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:38:45,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-04-14 01:38:45,783 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:45,783 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:38:45,784 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:38:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash 852575514, now seen corresponding path program 15 times [2025-04-14 01:38:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:38:45,784 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576266401] [2025-04-14 01:38:45,784 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:38:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:38:45,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:38:45,802 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:45,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:38:45,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:45,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:38:45,904 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576266401] [2025-04-14 01:38:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576266401] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:38:45,904 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219182070] [2025-04-14 01:38:45,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:38:45,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:38:45,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:38:45,907 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:38:45,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-04-14 01:38:45,961 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:38:46,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:38:46,066 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:38:46,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:38:46,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:38:46,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:38:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:46,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:38:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:38:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219182070] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:38:46,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:38:46,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-04-14 01:38:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321309364] [2025-04-14 01:38:46,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:38:46,200 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:38:46,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:38:46,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:38:46,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:38:46,201 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:38:46,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1437 transitions, 27815 flow. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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) [2025-04-14 01:38:46,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:38:46,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:38:46,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:38:50,764 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:38:54,767 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:38:56,223 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:39:00,404 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:39:04,406 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:39:07,512 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:39:10,828 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:39:14,327 INFO L116 PetriNetUnfolderBase]: 4348/8408 cut-off events. [2025-04-14 01:39:14,328 INFO L117 PetriNetUnfolderBase]: For 196925/196925 co-relation queries the response was YES. [2025-04-14 01:39:14,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74444 conditions, 8408 events. 4348/8408 cut-off events. For 196925/196925 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 68704 event pairs, 613 based on Foata normal form. 61/8469 useless extension candidates. Maximal degree in co-relation 74294. Up to 3118 conditions per place. [2025-04-14 01:39:14,435 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1076 selfloop transitions, 851 changer transitions 26/1953 dead transitions. [2025-04-14 01:39:14,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1953 transitions, 41309 flow [2025-04-14 01:39:14,436 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-04-14 01:39:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2025-04-14 01:39:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 305 transitions. [2025-04-14 01:39:14,436 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.341545352743561 [2025-04-14 01:39:14,436 INFO L175 Difference]: Start difference. First operand has 416 places, 1437 transitions, 27815 flow. Second operand 47 states and 305 transitions. [2025-04-14 01:39:14,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1953 transitions, 41309 flow [2025-04-14 01:39:17,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1953 transitions, 39833 flow, removed 433 selfloop flow, removed 14 redundant places. [2025-04-14 01:39:17,729 INFO L231 Difference]: Finished difference. Result has 467 places, 1766 transitions, 37569 flow [2025-04-14 01:39:17,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=26318, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=566, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=37569, PETRI_PLACES=467, PETRI_TRANSITIONS=1766} [2025-04-14 01:39:17,731 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 447 predicate places. [2025-04-14 01:39:17,731 INFO L485 AbstractCegarLoop]: Abstraction has has 467 places, 1766 transitions, 37569 flow [2025-04-14 01:39:17,732 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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) [2025-04-14 01:39:17,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:39:17,732 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:39:17,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-04-14 01:39:17,932 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-04-14 01:39:17,932 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:39:17,933 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:39:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1728723986, now seen corresponding path program 16 times [2025-04-14 01:39:17,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:39:17,933 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173111963] [2025-04-14 01:39:17,933 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:39:17,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:39:17,939 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:39:17,947 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:39:17,947 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:39:17,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:39:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:18,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:39:18,041 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173111963] [2025-04-14 01:39:18,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173111963] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:39:18,041 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998732554] [2025-04-14 01:39:18,041 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:39:18,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:39:18,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:39:18,044 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:39:18,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-04-14 01:39:18,086 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:39:18,102 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:39:18,102 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:39:18,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:39:18,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:39:18,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:39:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:18,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:39:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:18,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998732554] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:39:18,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:39:18,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-04-14 01:39:18,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065231362] [2025-04-14 01:39:18,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:39:18,303 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:39:18,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:39:18,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:39:18,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:39:18,304 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:39:18,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 1766 transitions, 37569 flow. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 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) [2025-04-14 01:39:18,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:39:18,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:39:18,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:39:28,847 INFO L116 PetriNetUnfolderBase]: 4567/8838 cut-off events. [2025-04-14 01:39:28,847 INFO L117 PetriNetUnfolderBase]: For 256120/256120 co-relation queries the response was YES. [2025-04-14 01:39:28,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85551 conditions, 8838 events. 4567/8838 cut-off events. For 256120/256120 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 72883 event pairs, 694 based on Foata normal form. 18/8856 useless extension candidates. Maximal degree in co-relation 85380. Up to 3460 conditions per place. [2025-04-14 01:39:28,955 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1279 selfloop transitions, 782 changer transitions 26/2087 dead transitions. [2025-04-14 01:39:28,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 2087 transitions, 47220 flow [2025-04-14 01:39:28,956 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-04-14 01:39:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-04-14 01:39:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 299 transitions. [2025-04-14 01:39:28,956 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37468671679197996 [2025-04-14 01:39:28,957 INFO L175 Difference]: Start difference. First operand has 467 places, 1766 transitions, 37569 flow. Second operand 42 states and 299 transitions. [2025-04-14 01:39:28,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 2087 transitions, 47220 flow [2025-04-14 01:39:33,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2087 transitions, 44801 flow, removed 1166 selfloop flow, removed 7 redundant places. [2025-04-14 01:39:33,041 INFO L231 Difference]: Finished difference. Result has 511 places, 1874 transitions, 40590 flow [2025-04-14 01:39:33,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=35051, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=680, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1029, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=40590, PETRI_PLACES=511, PETRI_TRANSITIONS=1874} [2025-04-14 01:39:33,055 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 491 predicate places. [2025-04-14 01:39:33,056 INFO L485 AbstractCegarLoop]: Abstraction has has 511 places, 1874 transitions, 40590 flow [2025-04-14 01:39:33,056 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 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) [2025-04-14 01:39:33,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:39:33,056 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:39:33,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-04-14 01:39:33,256 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-04-14 01:39:33,256 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:39:33,257 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:39:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1269192960, now seen corresponding path program 17 times [2025-04-14 01:39:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:39:33,257 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60000653] [2025-04-14 01:39:33,257 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:39:33,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:39:33,262 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:39:33,270 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:39:33,270 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:39:33,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:39:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:33,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:39:33,343 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60000653] [2025-04-14 01:39:33,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60000653] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:39:33,343 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435237430] [2025-04-14 01:39:33,343 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:39:33,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:39:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:39:33,345 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:39:33,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-04-14 01:39:33,386 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:39:33,414 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:39:33,414 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:39:33,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:39:33,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:39:33,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:39:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:33,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:39:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:33,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435237430] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:39:33,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:39:33,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-04-14 01:39:33,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266950880] [2025-04-14 01:39:33,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:39:33,594 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:39:33,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:39:33,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:39:33,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:39:33,595 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:39:33,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1874 transitions, 40590 flow. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 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) [2025-04-14 01:39:33,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:39:33,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:39:33,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:39:37,474 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:39:43,015 INFO L116 PetriNetUnfolderBase]: 5096/9913 cut-off events. [2025-04-14 01:39:43,016 INFO L117 PetriNetUnfolderBase]: For 329284/329284 co-relation queries the response was YES. [2025-04-14 01:39:43,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99399 conditions, 9913 events. 5096/9913 cut-off events. For 329284/329284 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 83734 event pairs, 722 based on Foata normal form. 44/9957 useless extension candidates. Maximal degree in co-relation 99211. Up to 3704 conditions per place. [2025-04-14 01:39:43,176 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1310 selfloop transitions, 961 changer transitions 35/2306 dead transitions. [2025-04-14 01:39:43,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2306 transitions, 54273 flow [2025-04-14 01:39:43,176 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-04-14 01:39:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2025-04-14 01:39:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 324 transitions. [2025-04-14 01:39:43,177 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3628219484882419 [2025-04-14 01:39:43,177 INFO L175 Difference]: Start difference. First operand has 511 places, 1874 transitions, 40590 flow. Second operand 47 states and 324 transitions. [2025-04-14 01:39:43,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2306 transitions, 54273 flow [2025-04-14 01:39:48,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 2306 transitions, 52745 flow, removed 664 selfloop flow, removed 17 redundant places. [2025-04-14 01:39:48,317 INFO L231 Difference]: Finished difference. Result has 560 places, 2078 transitions, 48393 flow [2025-04-14 01:39:48,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38904, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=766, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=48393, PETRI_PLACES=560, PETRI_TRANSITIONS=2078} [2025-04-14 01:39:48,320 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 540 predicate places. [2025-04-14 01:39:48,320 INFO L485 AbstractCegarLoop]: Abstraction has has 560 places, 2078 transitions, 48393 flow [2025-04-14 01:39:48,320 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 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) [2025-04-14 01:39:48,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:39:48,320 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:39:48,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-04-14 01:39:48,520 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-14 01:39:48,521 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:39:48,521 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:39:48,521 INFO L85 PathProgramCache]: Analyzing trace with hash -109489156, now seen corresponding path program 18 times [2025-04-14 01:39:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:39:48,522 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487256429] [2025-04-14 01:39:48,522 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:39:48,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:39:48,527 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:39:48,535 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:39:48,535 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:39:48,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:39:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:39:48,616 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487256429] [2025-04-14 01:39:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487256429] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:39:48,616 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194104310] [2025-04-14 01:39:48,616 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:39:48,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:39:48,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:39:48,618 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:39:48,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-04-14 01:39:48,659 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:39:48,679 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:39:48,679 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:39:48,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:39:48,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:39:48,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:39:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:48,726 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:39:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:39:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194104310] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:39:48,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:39:48,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-04-14 01:39:48,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408372095] [2025-04-14 01:39:48,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:39:48,813 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 01:39:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:39:48,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 01:39:48,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2025-04-14 01:39:48,814 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:39:48,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2078 transitions, 48393 flow. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 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) [2025-04-14 01:39:48,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:39:48,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:39:48,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:39:54,735 INFO L116 PetriNetUnfolderBase]: 5157/9914 cut-off events. [2025-04-14 01:39:54,735 INFO L117 PetriNetUnfolderBase]: For 380212/380212 co-relation queries the response was YES. [2025-04-14 01:39:54,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105671 conditions, 9914 events. 5157/9914 cut-off events. For 380212/380212 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 82432 event pairs, 2146 based on Foata normal form. 28/9942 useless extension candidates. Maximal degree in co-relation 105467. Up to 9270 conditions per place. [2025-04-14 01:39:54,898 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2015 selfloop transitions, 195 changer transitions 1/2211 dead transitions. [2025-04-14 01:39:54,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 2211 transitions, 56057 flow [2025-04-14 01:39:54,898 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 01:39:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 01:39:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 181 transitions. [2025-04-14 01:39:54,899 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3073005093378608 [2025-04-14 01:39:54,899 INFO L175 Difference]: Start difference. First operand has 560 places, 2078 transitions, 48393 flow. Second operand 31 states and 181 transitions. [2025-04-14 01:39:54,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 2211 transitions, 56057 flow [2025-04-14 01:40:01,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 2211 transitions, 53695 flow, removed 977 selfloop flow, removed 15 redundant places. [2025-04-14 01:40:01,550 INFO L231 Difference]: Finished difference. Result has 577 places, 2136 transitions, 48358 flow [2025-04-14 01:40:01,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=45993, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=48358, PETRI_PLACES=577, PETRI_TRANSITIONS=2136} [2025-04-14 01:40:01,551 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 557 predicate places. [2025-04-14 01:40:01,551 INFO L485 AbstractCegarLoop]: Abstraction has has 577 places, 2136 transitions, 48358 flow [2025-04-14 01:40:01,552 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 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) [2025-04-14 01:40:01,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:01,552 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:01,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-04-14 01:40:01,752 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:01,752 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:40:01,753 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash 837195976, now seen corresponding path program 19 times [2025-04-14 01:40:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:01,753 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715859671] [2025-04-14 01:40:01,753 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:40:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:01,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:40:01,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:40:01,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:01,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:01,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:01,883 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715859671] [2025-04-14 01:40:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715859671] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:01,883 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962312178] [2025-04-14 01:40:01,883 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:40:01,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:01,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:01,886 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:40:01,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-04-14 01:40:01,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:40:01,940 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:40:01,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:01,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:01,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:40:01,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:01,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962312178] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:02,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:02,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-04-14 01:40:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257777176] [2025-04-14 01:40:02,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:02,076 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:40:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:02,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:40:02,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:40:02,076 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:02,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 2136 transitions, 48358 flow. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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) [2025-04-14 01:40:02,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:02,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:02,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:07,849 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:40:13,738 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:40:20,427 INFO L116 PetriNetUnfolderBase]: 5359/10341 cut-off events. [2025-04-14 01:40:20,428 INFO L117 PetriNetUnfolderBase]: For 388161/388161 co-relation queries the response was YES. [2025-04-14 01:40:20,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107640 conditions, 10341 events. 5359/10341 cut-off events. For 388161/388161 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 87319 event pairs, 824 based on Foata normal form. 23/10364 useless extension candidates. Maximal degree in co-relation 107432. Up to 4107 conditions per place. [2025-04-14 01:40:20,604 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1426 selfloop transitions, 940 changer transitions 10/2376 dead transitions. [2025-04-14 01:40:20,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 2376 transitions, 58343 flow [2025-04-14 01:40:20,604 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-14 01:40:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-14 01:40:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 220 transitions. [2025-04-14 01:40:20,605 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34055727554179566 [2025-04-14 01:40:20,605 INFO L175 Difference]: Start difference. First operand has 577 places, 2136 transitions, 48358 flow. Second operand 34 states and 220 transitions. [2025-04-14 01:40:20,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 2376 transitions, 58343 flow [2025-04-14 01:40:27,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 2376 transitions, 58059 flow, removed 112 selfloop flow, removed 7 redundant places. [2025-04-14 01:40:27,531 INFO L231 Difference]: Finished difference. Result has 614 places, 2216 transitions, 54506 flow [2025-04-14 01:40:27,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=47895, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=860, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=54506, PETRI_PLACES=614, PETRI_TRANSITIONS=2216} [2025-04-14 01:40:27,532 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 594 predicate places. [2025-04-14 01:40:27,532 INFO L485 AbstractCegarLoop]: Abstraction has has 614 places, 2216 transitions, 54506 flow [2025-04-14 01:40:27,533 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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) [2025-04-14 01:40:27,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:27,533 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:27,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-04-14 01:40:27,733 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-04-14 01:40:27,733 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:40:27,734 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2047699558, now seen corresponding path program 20 times [2025-04-14 01:40:27,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:27,734 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773738495] [2025-04-14 01:40:27,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:40:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:27,739 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:40:27,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:40:27,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:40:27,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:27,820 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773738495] [2025-04-14 01:40:27,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773738495] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:27,820 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060469726] [2025-04-14 01:40:27,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:40:27,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:27,822 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:40:27,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-04-14 01:40:27,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:40:27,877 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:40:27,878 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:40:27,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:27,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:40:27,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:27,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:27,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060469726] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:27,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:27,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-04-14 01:40:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370817450] [2025-04-14 01:40:27,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:27,986 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:40:27,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:27,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:40:27,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:40:27,986 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:27,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 2216 transitions, 54506 flow. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2025-04-14 01:40:27,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:27,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:27,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:34,602 WARN L286 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 25 DAG size of output: 15 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 01:40:40,440 WARN L286 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 29 DAG size of output: 15 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 01:40:50,518 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:41:00,852 INFO L116 PetriNetUnfolderBase]: 5848/11361 cut-off events. [2025-04-14 01:41:00,852 INFO L117 PetriNetUnfolderBase]: For 525260/525260 co-relation queries the response was YES. [2025-04-14 01:41:00,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124999 conditions, 11361 events. 5848/11361 cut-off events. For 525260/525260 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 98301 event pairs, 762 based on Foata normal form. 28/11389 useless extension candidates. Maximal degree in co-relation 124779. Up to 3868 conditions per place. [2025-04-14 01:41:01,042 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 1489 selfloop transitions, 1103 changer transitions 19/2611 dead transitions. [2025-04-14 01:41:01,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 2611 transitions, 68864 flow [2025-04-14 01:41:01,043 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 01:41:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 01:41:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 208 transitions. [2025-04-14 01:41:01,044 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39097744360902253 [2025-04-14 01:41:01,044 INFO L175 Difference]: Start difference. First operand has 614 places, 2216 transitions, 54506 flow. Second operand 28 states and 208 transitions. [2025-04-14 01:41:01,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 2611 transitions, 68864 flow [2025-04-14 01:41:10,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 2611 transitions, 67555 flow, removed 554 selfloop flow, removed 19 redundant places. [2025-04-14 01:41:10,696 INFO L231 Difference]: Finished difference. Result has 636 places, 2393 transitions, 63270 flow [2025-04-14 01:41:10,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=53113, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=938, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=63270, PETRI_PLACES=636, PETRI_TRANSITIONS=2393} [2025-04-14 01:41:10,698 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 616 predicate places. [2025-04-14 01:41:10,698 INFO L485 AbstractCegarLoop]: Abstraction has has 636 places, 2393 transitions, 63270 flow [2025-04-14 01:41:10,698 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2025-04-14 01:41:10,698 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:10,698 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:10,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-04-14 01:41:10,898 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-14 01:41:10,899 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:10,899 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 535997898, now seen corresponding path program 21 times [2025-04-14 01:41:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:10,899 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228144901] [2025-04-14 01:41:10,899 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:41:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:10,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:41:10,912 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:41:10,912 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:41:10,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:11,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:11,000 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228144901] [2025-04-14 01:41:11,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228144901] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:11,000 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547800453] [2025-04-14 01:41:11,000 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:41:11,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:11,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:11,002 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:11,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-04-14 01:41:11,048 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:41:11,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:41:11,124 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:41:11,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:11,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:41:11,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:11,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547800453] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:11,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:11,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-04-14 01:41:11,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324850749] [2025-04-14 01:41:11,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:11,279 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:41:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:11,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:41:11,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:41:11,280 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:11,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 2393 transitions, 63270 flow. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 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) [2025-04-14 01:41:11,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:11,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:11,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:24,261 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:41:32,422 INFO L116 PetriNetUnfolderBase]: 7955/15468 cut-off events. [2025-04-14 01:41:32,423 INFO L117 PetriNetUnfolderBase]: For 883309/883309 co-relation queries the response was YES. [2025-04-14 01:41:32,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182846 conditions, 15468 events. 7955/15468 cut-off events. For 883309/883309 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 137061 event pairs, 903 based on Foata normal form. 132/15600 useless extension candidates. Maximal degree in co-relation 182618. Up to 5113 conditions per place. [2025-04-14 01:41:32,770 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2388 selfloop transitions, 988 changer transitions 8/3384 dead transitions. [2025-04-14 01:41:32,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 3384 transitions, 98048 flow [2025-04-14 01:41:32,771 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-04-14 01:41:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2025-04-14 01:41:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 345 transitions. [2025-04-14 01:41:32,772 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3426017874875869 [2025-04-14 01:41:32,772 INFO L175 Difference]: Start difference. First operand has 636 places, 2393 transitions, 63270 flow. Second operand 53 states and 345 transitions. [2025-04-14 01:41:32,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 3384 transitions, 98048 flow [2025-04-14 01:41:51,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 3384 transitions, 95727 flow, removed 1106 selfloop flow, removed 7 redundant places. [2025-04-14 01:41:51,890 INFO L231 Difference]: Finished difference. Result has 719 places, 2910 transitions, 79644 flow [2025-04-14 01:41:51,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=61453, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=79644, PETRI_PLACES=719, PETRI_TRANSITIONS=2910} [2025-04-14 01:41:51,892 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 699 predicate places. [2025-04-14 01:41:51,892 INFO L485 AbstractCegarLoop]: Abstraction has has 719 places, 2910 transitions, 79644 flow [2025-04-14 01:41:51,892 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 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) [2025-04-14 01:41:51,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:51,892 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:51,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-04-14 01:41:52,093 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:52,093 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:52,094 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2110127846, now seen corresponding path program 22 times [2025-04-14 01:41:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:52,094 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650055467] [2025-04-14 01:41:52,094 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:52,098 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:41:52,102 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:41:52,102 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:52,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:52,196 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650055467] [2025-04-14 01:41:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650055467] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:52,196 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586870830] [2025-04-14 01:41:52,196 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:52,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:52,198 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:52,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-04-14 01:41:52,240 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:41:52,252 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:41:52,252 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:52,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:52,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:41:52,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:52,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586870830] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:52,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:52,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-04-14 01:41:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316928999] [2025-04-14 01:41:52,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:52,457 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:41:52,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:52,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:41:52,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:41:52,457 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:52,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 2910 transitions, 79644 flow. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 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) [2025-04-14 01:41:52,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:52,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:52,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:06,278 INFO L116 PetriNetUnfolderBase]: 8331/16169 cut-off events. [2025-04-14 01:42:06,279 INFO L117 PetriNetUnfolderBase]: For 1047566/1047566 co-relation queries the response was YES. [2025-04-14 01:42:06,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201111 conditions, 16169 events. 8331/16169 cut-off events. For 1047566/1047566 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 144273 event pairs, 3254 based on Foata normal form. 72/16241 useless extension candidates. Maximal degree in co-relation 200848. Up to 13747 conditions per place. [2025-04-14 01:42:06,719 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2813 selfloop transitions, 388 changer transitions 1/3202 dead transitions. [2025-04-14 01:42:06,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 3202 transitions, 94763 flow [2025-04-14 01:42:06,720 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-14 01:42:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-14 01:42:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 207 transitions. [2025-04-14 01:42:06,720 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33014354066985646 [2025-04-14 01:42:06,721 INFO L175 Difference]: Start difference. First operand has 719 places, 2910 transitions, 79644 flow. Second operand 33 states and 207 transitions. [2025-04-14 01:42:06,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 3202 transitions, 94763 flow [2025-04-14 01:42:30,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 3202 transitions, 92785 flow, removed 970 selfloop flow, removed 1 redundant places. [2025-04-14 01:42:30,412 INFO L231 Difference]: Finished difference. Result has 768 places, 3054 transitions, 83823 flow [2025-04-14 01:42:30,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=77778, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=83823, PETRI_PLACES=768, PETRI_TRANSITIONS=3054} [2025-04-14 01:42:30,414 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 748 predicate places. [2025-04-14 01:42:30,414 INFO L485 AbstractCegarLoop]: Abstraction has has 768 places, 3054 transitions, 83823 flow [2025-04-14 01:42:30,415 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 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) [2025-04-14 01:42:30,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:42:30,415 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:42:30,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-04-14 01:42:30,615 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:30,615 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:42:30,616 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:42:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash -979490752, now seen corresponding path program 23 times [2025-04-14 01:42:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:42:30,616 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047607119] [2025-04-14 01:42:30,616 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:42:30,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:42:30,621 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:42:30,628 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:42:30,628 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:42:30,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:30,709 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047607119] [2025-04-14 01:42:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047607119] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:30,709 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716055566] [2025-04-14 01:42:30,709 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:42:30,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:30,711 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:30,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-04-14 01:42:30,754 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:42:30,994 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:42:30,995 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:42:30,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:30,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:42:30,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:31,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:31,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716055566] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:31,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:31,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-04-14 01:42:31,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803641022] [2025-04-14 01:42:31,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:31,170 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:42:31,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:31,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:42:31,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:42:31,172 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:31,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 3054 transitions, 83823 flow. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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) [2025-04-14 01:42:31,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:31,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:31,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:50,307 INFO L116 PetriNetUnfolderBase]: 8615/16656 cut-off events. [2025-04-14 01:42:50,308 INFO L117 PetriNetUnfolderBase]: For 1122407/1122407 co-relation queries the response was YES. [2025-04-14 01:42:50,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210569 conditions, 16656 events. 8615/16656 cut-off events. For 1122407/1122407 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 148682 event pairs, 3236 based on Foata normal form. 92/16748 useless extension candidates. Maximal degree in co-relation 210287. Up to 13785 conditions per place. [2025-04-14 01:42:50,719 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2800 selfloop transitions, 559 changer transitions 3/3362 dead transitions. [2025-04-14 01:42:50,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 3362 transitions, 100352 flow [2025-04-14 01:42:50,721 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-14 01:42:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-14 01:42:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 241 transitions. [2025-04-14 01:42:50,722 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34281650071123754 [2025-04-14 01:42:50,722 INFO L175 Difference]: Start difference. First operand has 768 places, 3054 transitions, 83823 flow. Second operand 37 states and 241 transitions. [2025-04-14 01:42:50,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 3362 transitions, 100352 flow [2025-04-14 01:43:17,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 3362 transitions, 99581 flow, removed 298 selfloop flow, removed 8 redundant places. [2025-04-14 01:43:17,141 INFO L231 Difference]: Finished difference. Result has 818 places, 3196 transitions, 90476 flow [2025-04-14 01:43:17,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=82961, PETRI_DIFFERENCE_MINUEND_PLACES=760, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=90476, PETRI_PLACES=818, PETRI_TRANSITIONS=3196} [2025-04-14 01:43:17,145 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 798 predicate places. [2025-04-14 01:43:17,145 INFO L485 AbstractCegarLoop]: Abstraction has has 818 places, 3196 transitions, 90476 flow [2025-04-14 01:43:17,145 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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) [2025-04-14 01:43:17,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:17,145 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:17,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-04-14 01:43:17,345 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:17,346 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:17,347 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:17,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2060091706, now seen corresponding path program 24 times [2025-04-14 01:43:17,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:17,347 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620384328] [2025-04-14 01:43:17,347 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:43:17,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:17,351 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:43:17,357 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:43:17,357 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:43:17,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:17,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:17,465 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620384328] [2025-04-14 01:43:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620384328] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:17,465 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933465166] [2025-04-14 01:43:17,465 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:43:17,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:17,468 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:17,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-04-14 01:43:17,519 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:43:17,540 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:43:17,540 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:43:17,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:17,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:43:17,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:17,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:17,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933465166] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:17,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:17,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-04-14 01:43:17,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796897863] [2025-04-14 01:43:17,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:17,691 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:43:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:17,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:43:17,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:43:17,692 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:17,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 3196 transitions, 90476 flow. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2025-04-14 01:43:17,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:17,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:17,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:34,208 INFO L116 PetriNetUnfolderBase]: 8724/16902 cut-off events. [2025-04-14 01:43:34,208 INFO L117 PetriNetUnfolderBase]: For 1172339/1172339 co-relation queries the response was YES. [2025-04-14 01:43:34,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217391 conditions, 16902 events. 8724/16902 cut-off events. For 1172339/1172339 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 151913 event pairs, 308 based on Foata normal form. 42/16944 useless extension candidates. Maximal degree in co-relation 217092. Up to 5541 conditions per place. [2025-04-14 01:43:34,578 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2758 selfloop transitions, 912 changer transitions 9/3679 dead transitions. [2025-04-14 01:43:34,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 841 places, 3679 transitions, 112243 flow [2025-04-14 01:43:34,579 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 01:43:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 01:43:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 167 transitions. [2025-04-14 01:43:34,579 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36622807017543857 [2025-04-14 01:43:34,579 INFO L175 Difference]: Start difference. First operand has 818 places, 3196 transitions, 90476 flow. Second operand 24 states and 167 transitions. [2025-04-14 01:43:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 841 places, 3679 transitions, 112243 flow [2025-04-14 01:44:04,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 835 places, 3679 transitions, 111179 flow, removed 483 selfloop flow, removed 6 redundant places. [2025-04-14 01:44:05,019 INFO L231 Difference]: Finished difference. Result has 846 places, 3265 transitions, 94500 flow [2025-04-14 01:44:05,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=89516, PETRI_DIFFERENCE_MINUEND_PLACES=812, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=843, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=94500, PETRI_PLACES=846, PETRI_TRANSITIONS=3265} [2025-04-14 01:44:05,021 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 826 predicate places. [2025-04-14 01:44:05,021 INFO L485 AbstractCegarLoop]: Abstraction has has 846 places, 3265 transitions, 94500 flow [2025-04-14 01:44:05,021 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2025-04-14 01:44:05,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:05,021 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:05,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-04-14 01:44:05,222 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:05,222 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:05,223 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:05,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1961391104, now seen corresponding path program 25 times [2025-04-14 01:44:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:05,223 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550012766] [2025-04-14 01:44:05,223 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:44:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:05,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:44:05,232 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:44:05,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:44:05,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:05,324 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550012766] [2025-04-14 01:44:05,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550012766] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:05,324 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331607046] [2025-04-14 01:44:05,324 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:44:05,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:05,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:05,326 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:05,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-04-14 01:44:05,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:44:05,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:44:05,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:44:05,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:05,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:44:05,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:05,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:05,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331607046] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:05,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:05,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-04-14 01:44:05,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608485725] [2025-04-14 01:44:05,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:05,517 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 01:44:05,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:05,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 01:44:05,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-04-14 01:44:05,518 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:05,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 3265 transitions, 94500 flow. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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) [2025-04-14 01:44:05,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:05,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:05,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:22,664 INFO L116 PetriNetUnfolderBase]: 8863/17145 cut-off events. [2025-04-14 01:44:22,665 INFO L117 PetriNetUnfolderBase]: For 1259838/1259838 co-relation queries the response was YES. [2025-04-14 01:44:23,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226275 conditions, 17145 events. 8863/17145 cut-off events. For 1259838/1259838 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 154064 event pairs, 1160 based on Foata normal form. 52/17197 useless extension candidates. Maximal degree in co-relation 225966. Up to 5606 conditions per place. [2025-04-14 01:44:23,108 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2807 selfloop transitions, 933 changer transitions 8/3748 dead transitions. [2025-04-14 01:44:23,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 891 places, 3748 transitions, 117279 flow [2025-04-14 01:44:23,108 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-04-14 01:44:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-04-14 01:44:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 284 transitions. [2025-04-14 01:44:23,109 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32494279176201374 [2025-04-14 01:44:23,109 INFO L175 Difference]: Start difference. First operand has 846 places, 3265 transitions, 94500 flow. Second operand 46 states and 284 transitions. [2025-04-14 01:44:23,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 891 places, 3748 transitions, 117279 flow [2025-04-14 01:44:57,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 3748 transitions, 116282 flow, removed 349 selfloop flow, removed 10 redundant places. [2025-04-14 01:44:57,288 INFO L231 Difference]: Finished difference. Result has 896 places, 3348 transitions, 99258 flow [2025-04-14 01:44:57,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=93580, PETRI_DIFFERENCE_MINUEND_PLACES=836, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=856, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=99258, PETRI_PLACES=896, PETRI_TRANSITIONS=3348} [2025-04-14 01:44:57,291 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 876 predicate places. [2025-04-14 01:44:57,291 INFO L485 AbstractCegarLoop]: Abstraction has has 896 places, 3348 transitions, 99258 flow [2025-04-14 01:44:57,291 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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) [2025-04-14 01:44:57,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:57,291 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:57,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-04-14 01:44:57,491 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-04-14 01:44:57,492 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:57,492 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1723892276, now seen corresponding path program 26 times [2025-04-14 01:44:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:57,493 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906928242] [2025-04-14 01:44:57,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:44:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:57,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:44:57,505 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:44:57,505 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:57,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:57,633 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906928242] [2025-04-14 01:44:57,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906928242] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:57,634 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359033204] [2025-04-14 01:44:57,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:44:57,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:57,636 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:57,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-04-14 01:44:57,683 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:44:57,697 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:44:57,697 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:57,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:57,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:44:57,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:57,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359033204] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:57,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:57,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-04-14 01:44:57,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141870750] [2025-04-14 01:44:57,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:57,862 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:44:57,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:57,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:44:57,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:44:57,862 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:57,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 896 places, 3348 transitions, 99258 flow. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 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) [2025-04-14 01:44:57,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:57,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:57,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:45:16,611 INFO L116 PetriNetUnfolderBase]: 9326/17974 cut-off events. [2025-04-14 01:45:16,612 INFO L117 PetriNetUnfolderBase]: For 1462899/1462899 co-relation queries the response was YES. [2025-04-14 01:45:17,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246770 conditions, 17974 events. 9326/17974 cut-off events. For 1462899/1462899 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 162537 event pairs, 3473 based on Foata normal form. 62/18036 useless extension candidates. Maximal degree in co-relation 246451. Up to 14871 conditions per place. [2025-04-14 01:45:17,086 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 3138 selfloop transitions, 596 changer transitions 1/3735 dead transitions. [2025-04-14 01:45:17,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 943 places, 3735 transitions, 120369 flow [2025-04-14 01:45:17,087 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-04-14 01:45:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-04-14 01:45:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 307 transitions. [2025-04-14 01:45:17,087 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3366228070175439 [2025-04-14 01:45:17,088 INFO L175 Difference]: Start difference. First operand has 896 places, 3348 transitions, 99258 flow. Second operand 48 states and 307 transitions. [2025-04-14 01:45:17,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 943 places, 3735 transitions, 120369 flow [2025-04-14 01:45:55,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 933 places, 3735 transitions, 118826 flow, removed 597 selfloop flow, removed 10 redundant places. [2025-04-14 01:45:55,857 INFO L231 Difference]: Finished difference. Result has 954 places, 3542 transitions, 107848 flow [2025-04-14 01:45:55,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=97675, PETRI_DIFFERENCE_MINUEND_PLACES=886, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=107848, PETRI_PLACES=954, PETRI_TRANSITIONS=3542} [2025-04-14 01:45:55,860 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 934 predicate places. [2025-04-14 01:45:55,860 INFO L485 AbstractCegarLoop]: Abstraction has has 954 places, 3542 transitions, 107848 flow [2025-04-14 01:45:55,860 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 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) [2025-04-14 01:45:55,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:45:55,860 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:45:55,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-04-14 01:45:56,060 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:45:56,061 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:45:56,061 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:45:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1044500998, now seen corresponding path program 27 times [2025-04-14 01:45:56,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:45:56,062 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447234419] [2025-04-14 01:45:56,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:45:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:45:56,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:45:56,077 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:45:56,077 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:45:56,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:45:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:45:56,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:45:56,219 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447234419] [2025-04-14 01:45:56,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447234419] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:45:56,220 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454021126] [2025-04-14 01:45:56,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:45:56,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:45:56,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:45:56,222 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:45:56,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-04-14 01:45:56,275 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:45:56,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:45:56,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:45:56,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:45:56,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:45:56,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:45:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:45:56,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:45:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:45:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454021126] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:45:56,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:45:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2025-04-14 01:45:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071437889] [2025-04-14 01:45:56,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:45:56,526 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-14 01:45:56,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:45:56,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-14 01:45:56,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2025-04-14 01:45:56,527 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:45:56,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 954 places, 3542 transitions, 107848 flow. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 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) [2025-04-14 01:45:56,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:45:56,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:45:56,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:21,797 INFO L116 PetriNetUnfolderBase]: 10563/20230 cut-off events. [2025-04-14 01:46:21,797 INFO L117 PetriNetUnfolderBase]: For 1796040/1796040 co-relation queries the response was YES. [2025-04-14 01:46:22,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293148 conditions, 20230 events. 10563/20230 cut-off events. For 1796040/1796040 co-relation queries the response was YES. Maximal size of possible extension queue 1474. Compared 185755 event pairs, 3402 based on Foata normal form. 158/20388 useless extension candidates. Maximal degree in co-relation 292808. Up to 14950 conditions per place. [2025-04-14 01:46:22,532 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 3137 selfloop transitions, 1181 changer transitions 3/4321 dead transitions. [2025-04-14 01:46:22,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 4321 transitions, 147481 flow [2025-04-14 01:46:22,533 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-04-14 01:46:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-04-14 01:46:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 282 transitions. [2025-04-14 01:46:22,534 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3533834586466165 [2025-04-14 01:46:22,534 INFO L175 Difference]: Start difference. First operand has 954 places, 3542 transitions, 107848 flow. Second operand 42 states and 282 transitions. [2025-04-14 01:46:22,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 4321 transitions, 147481 flow [2025-04-14 01:47:18,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 977 places, 4321 transitions, 145109 flow, removed 1067 selfloop flow, removed 18 redundant places. [2025-04-14 01:47:18,330 INFO L231 Difference]: Finished difference. Result has 998 places, 4063 transitions, 131147 flow [2025-04-14 01:47:18,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=105981, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=742, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=131147, PETRI_PLACES=998, PETRI_TRANSITIONS=4063} [2025-04-14 01:47:18,333 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 978 predicate places. [2025-04-14 01:47:18,333 INFO L485 AbstractCegarLoop]: Abstraction has has 998 places, 4063 transitions, 131147 flow [2025-04-14 01:47:18,333 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 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) [2025-04-14 01:47:18,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:47:18,334 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:47:18,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-04-14 01:47:18,534 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:47:18,534 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:47:18,535 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:47:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2029922064, now seen corresponding path program 28 times [2025-04-14 01:47:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:47:18,535 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27783499] [2025-04-14 01:47:18,535 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:47:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:47:18,540 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:47:18,545 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:47:18,545 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:47:18,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:47:18,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:47:18,694 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27783499] [2025-04-14 01:47:18,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27783499] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:47:18,694 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257687700] [2025-04-14 01:47:18,694 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:47:18,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:47:18,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:47:18,697 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:47:18,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-04-14 01:47:18,745 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 01:47:18,758 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:47:18,758 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:47:18,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:18,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:47:18,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:47:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:47:18,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:47:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:47:18,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257687700] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:47:18,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:47:18,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-04-14 01:47:18,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207339613] [2025-04-14 01:47:18,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:47:18,923 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:47:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:47:18,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:47:18,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:47:18,923 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:47:18,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 4063 transitions, 131147 flow. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2025-04-14 01:47:18,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:47:18,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:47:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:47:45,511 INFO L116 PetriNetUnfolderBase]: 10940/20971 cut-off events. [2025-04-14 01:47:45,512 INFO L117 PetriNetUnfolderBase]: For 2155035/2155035 co-relation queries the response was YES. [2025-04-14 01:47:46,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320095 conditions, 20971 events. 10940/20971 cut-off events. For 2155035/2155035 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 194300 event pairs, 1626 based on Foata normal form. 52/21023 useless extension candidates. Maximal degree in co-relation 319741. Up to 6997 conditions per place. [2025-04-14 01:47:46,150 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 3420 selfloop transitions, 1259 changer transitions 8/4687 dead transitions. [2025-04-14 01:47:46,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1040 places, 4687 transitions, 162228 flow [2025-04-14 01:47:46,151 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-14 01:47:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-04-14 01:47:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 291 transitions. [2025-04-14 01:47:46,152 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3561811505507956 [2025-04-14 01:47:46,152 INFO L175 Difference]: Start difference. First operand has 998 places, 4063 transitions, 131147 flow. Second operand 43 states and 291 transitions. [2025-04-14 01:47:46,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1040 places, 4687 transitions, 162228 flow [2025-04-14 01:48:47,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1029 places, 4687 transitions, 158328 flow, removed 1887 selfloop flow, removed 11 redundant places. [2025-04-14 01:48:47,380 INFO L231 Difference]: Finished difference. Result has 1046 places, 4239 transitions, 138796 flow [2025-04-14 01:48:47,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=127602, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=138796, PETRI_PLACES=1046, PETRI_TRANSITIONS=4239} [2025-04-14 01:48:47,383 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 1026 predicate places. [2025-04-14 01:48:47,383 INFO L485 AbstractCegarLoop]: Abstraction has has 1046 places, 4239 transitions, 138796 flow [2025-04-14 01:48:47,383 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2025-04-14 01:48:47,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:48:47,383 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:48:47,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-04-14 01:48:47,583 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-04-14 01:48:47,584 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:48:47,584 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:48:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash -309098978, now seen corresponding path program 29 times [2025-04-14 01:48:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:48:47,585 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600585444] [2025-04-14 01:48:47,585 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:48:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:48:47,592 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:48:47,599 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:48:47,600 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:48:47,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:48:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:48:47,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:48:47,781 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600585444] [2025-04-14 01:48:47,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600585444] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:48:47,781 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694338872] [2025-04-14 01:48:47,781 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:48:47,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:48:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:48:47,783 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:48:47,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-04-14 01:48:47,832 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 01:48:47,931 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:48:47,931 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:48:47,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:48:47,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:48:47,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:48:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:48:48,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:48:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:48:48,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694338872] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:48:48,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:48:48,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2025-04-14 01:48:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373882828] [2025-04-14 01:48:48,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:48:48,120 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:48:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:48:48,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:48:48,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:48:48,120 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:48:48,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1046 places, 4239 transitions, 138796 flow. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 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) [2025-04-14 01:48:48,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:48:48,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:48:48,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:48:56,525 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 24 DAG size of output: 22 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 01:49:04,597 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 29 DAG size of output: 26 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 01:49:34,758 INFO L116 PetriNetUnfolderBase]: 11903/22910 cut-off events. [2025-04-14 01:49:34,759 INFO L117 PetriNetUnfolderBase]: For 2589392/2589392 co-relation queries the response was YES. [2025-04-14 01:49:35,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362480 conditions, 22910 events. 11903/22910 cut-off events. For 2589392/2589392 co-relation queries the response was YES. Maximal size of possible extension queue 1634. Compared 215415 event pairs, 1772 based on Foata normal form. 72/22982 useless extension candidates. Maximal degree in co-relation 362111. Up to 7309 conditions per place. [2025-04-14 01:49:35,470 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 3226 selfloop transitions, 1815 changer transitions 13/5054 dead transitions. [2025-04-14 01:49:35,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 5054 transitions, 179292 flow [2025-04-14 01:49:35,471 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-04-14 01:49:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-04-14 01:49:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 316 transitions. [2025-04-14 01:49:35,471 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2025-04-14 01:49:35,472 INFO L175 Difference]: Start difference. First operand has 1046 places, 4239 transitions, 138796 flow. Second operand 40 states and 316 transitions. [2025-04-14 01:49:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 5054 transitions, 179292 flow Received shutdown request... [2025-04-14 01:50:39,086 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-14 01:50:39,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2025-04-14 01:50:39,102 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:50:39,102 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:50:39,287 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-04-14 01:50:39,287 WARN L610 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2025-04-14 01:50:39,289 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-14 01:50:39,289 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 01:50:39,289 INFO L422 BasicCegarLoop]: Path program histogram: [29, 4, 3, 1, 1] [2025-04-14 01:50:39,291 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 01:50:39,291 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 01:50:39,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 01:50:39 BasicIcfg [2025-04-14 01:50:39,294 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 01:50:39,294 INFO L158 Benchmark]: Toolchain (without parser) took 798751.83ms. Allocated memory was 142.6MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 100.6MB in the beginning and 325.0MB in the end (delta: -224.4MB). Peak memory consumption was 4.4GB. Max. memory is 8.0GB. [2025-04-14 01:50:39,294 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 163.6MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:50:39,294 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.50ms. Allocated memory is still 142.6MB. Free memory was 100.4MB in the beginning and 85.6MB in the end (delta: 14.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2025-04-14 01:50:39,294 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.78ms. Allocated memory is still 142.6MB. Free memory was 85.6MB in the beginning and 83.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:50:39,294 INFO L158 Benchmark]: Boogie Preprocessor took 47.49ms. Allocated memory is still 142.6MB. Free memory was 83.7MB in the beginning and 81.7MB in the end (delta: 1.9MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 01:50:39,295 INFO L158 Benchmark]: IcfgBuilder took 623.36ms. Allocated memory is still 142.6MB. Free memory was 81.7MB in the beginning and 34.2MB in the end (delta: 47.6MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. [2025-04-14 01:50:39,295 INFO L158 Benchmark]: TraceAbstraction took 797834.30ms. Allocated memory was 142.6MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 33.8MB in the beginning and 325.0MB in the end (delta: -291.2MB). Peak memory consumption was 4.4GB. Max. memory is 8.0GB. [2025-04-14 01:50:39,295 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 163.6MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.50ms. Allocated memory is still 142.6MB. Free memory was 100.4MB in the beginning and 85.6MB in the end (delta: 14.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.78ms. Allocated memory is still 142.6MB. Free memory was 85.6MB in the beginning and 83.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 47.49ms. Allocated memory is still 142.6MB. Free memory was 83.7MB in the beginning and 81.7MB in the end (delta: 1.9MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * IcfgBuilder took 623.36ms. Allocated memory is still 142.6MB. Free memory was 81.7MB in the beginning and 34.2MB in the end (delta: 47.6MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. * TraceAbstraction took 797834.30ms. Allocated memory was 142.6MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 33.8MB in the beginning and 325.0MB in the end (delta: -291.2MB). Peak memory consumption was 4.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 25 locations, 29 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: 797.7s, OverallIterations: 38, TraceHistogramMax: 3, PathProgramHistogramMax: 29, EmptinessCheckTime: 0.0s, AutomataDifference: 753.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 4343 SdHoareTripleChecker+Valid, 73.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4343 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 70.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 865 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23114 IncrementalHoareTripleChecker+Invalid, 23989 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 865 mSolverCounterUnsat, 0 mSDtfsCounter, 23114 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2591 GetRequests, 1371 SyntacticMatches, 22 SemanticMatches, 1198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12413 ImplicationChecksByTransitivity, 80.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138796occurred in iteration=37, InterpolantAutomatonStates: 1001, 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: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 33.9s InterpolantComputationTime, 1347 NumberOfCodeBlocks, 1347 NumberOfCodeBlocksAsserted, 149 NumberOfCheckSat, 1872 ConstructedInterpolants, 9 QuantifiedInterpolants, 13644 SizeOfPredicates, 86 NumberOfNonLiveVariables, 5660 ConjunctsInSsa, 473 ConjunctsInUnsatCore, 105 InterpolantComputations, 7 PerfectInterpolantSequences, 298/1020 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown