/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/chl-sre-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 13:05:15,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 13:05:15,640 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 13:05:15,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 13:05:15,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 13:05:15,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 13:05:15,683 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 13:05:15,688 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 13:05:15,689 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 13:05:15,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 13:05:15,692 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 13:05:15,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 13:05:15,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 13:05:15,694 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 13:05:15,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 13:05:15,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 13:05:15,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 13:05:15,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 13:05:15,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 13:05:15,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 13:05:15,696 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 13:05:15,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 13:05:15,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 13:05:15,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 13:05:15,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 13:05:15,697 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 13:05:15,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 13:05:15,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:05:15,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 13:05:15,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 13:05:15,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 13:05:15,699 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 13:05:15,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 13:05:15,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 13:05:15,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 13:05:15,700 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 13:05:16,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 13:05:16,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 13:05:16,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 13:05:16,047 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 13:05:16,048 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 13:05:16,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-sre-subst.wvr.c [2023-08-27 13:05:17,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 13:05:17,443 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 13:05:17,444 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-sre-subst.wvr.c [2023-08-27 13:05:17,449 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d29da130/4e31d5469c1f4520b69e0f4df5566fb0/FLAGa82fd60cf [2023-08-27 13:05:17,460 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d29da130/4e31d5469c1f4520b69e0f4df5566fb0 [2023-08-27 13:05:17,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 13:05:17,463 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 13:05:17,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 13:05:17,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 13:05:17,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 13:05:17,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f7c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17, skipping insertion in model container [2023-08-27 13:05:17,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,487 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 13:05:17,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:05:17,680 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 13:05:17,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:05:17,726 INFO L206 MainTranslator]: Completed translation [2023-08-27 13:05:17,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17 WrapperNode [2023-08-27 13:05:17,727 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 13:05:17,728 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 13:05:17,728 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 13:05:17,728 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 13:05:17,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,770 INFO L138 Inliner]: procedures = 22, calls = 27, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-08-27 13:05:17,771 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 13:05:17,772 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 13:05:17,772 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 13:05:17,772 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 13:05:17,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,784 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,805 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 13:05:17,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 13:05:17,806 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 13:05:17,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 13:05:17,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (1/1) ... [2023-08-27 13:05:17,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:05:17,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:05:17,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 13:05:17,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 13:05:17,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 13:05:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 13:05:17,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 13:05:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 13:05:17,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 13:05:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 13:05:17,880 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 13:05:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 13:05:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 13:05:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 13:05:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 13:05:17,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 13:05:17,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 13:05:17,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 13:05:17,882 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 13:05:17,988 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 13:05:17,990 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 13:05:18,175 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 13:05:18,181 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 13:05:18,181 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-27 13:05:18,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:05:18 BoogieIcfgContainer [2023-08-27 13:05:18,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 13:05:18,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 13:05:18,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 13:05:18,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 13:05:18,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:05:17" (1/3) ... [2023-08-27 13:05:18,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ed8bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:05:18, skipping insertion in model container [2023-08-27 13:05:18,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:05:17" (2/3) ... [2023-08-27 13:05:18,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ed8bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:05:18, skipping insertion in model container [2023-08-27 13:05:18,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:05:18" (3/3) ... [2023-08-27 13:05:18,191 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-sre-subst.wvr.c [2023-08-27 13:05:18,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 13:05:18,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 13:05:18,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 13:05:18,252 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 13:05:18,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 91 transitions, 206 flow [2023-08-27 13:05:18,341 INFO L124 PetriNetUnfolderBase]: 2/88 cut-off events. [2023-08-27 13:05:18,341 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 13:05:18,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 88 events. 2/88 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-27 13:05:18,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 91 transitions, 206 flow [2023-08-27 13:05:18,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 77 transitions, 172 flow [2023-08-27 13:05:18,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 13:05:18,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 77 transitions, 172 flow [2023-08-27 13:05:18,361 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 77 transitions, 172 flow [2023-08-27 13:05:18,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 77 transitions, 172 flow [2023-08-27 13:05:18,387 INFO L124 PetriNetUnfolderBase]: 2/77 cut-off events. [2023-08-27 13:05:18,388 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 13:05:18,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 2/77 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2023-08-27 13:05:18,389 INFO L119 LiptonReduction]: Number of co-enabled transitions 270 [2023-08-27 13:05:20,475 INFO L134 LiptonReduction]: Checked pairs total: 323 [2023-08-27 13:05:20,475 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-27 13:05:20,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 13:05:20,493 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@39dae8fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 13:05:20,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-27 13:05:20,499 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 13:05:20,499 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-27 13:05:20,500 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 13:05:20,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:05:20,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:05:20,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 13:05:20,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:05:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1349388457, now seen corresponding path program 1 times [2023-08-27 13:05:20,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:05:20,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276471642] [2023-08-27 13:05:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:05:20,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:05:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:05:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:05:22,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:05:22,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276471642] [2023-08-27 13:05:22,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276471642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:05:22,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:05:22,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 13:05:22,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495024590] [2023-08-27 13:05:22,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:05:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:05:22,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:05:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:05:22,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:05:22,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-08-27 13:05:22,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:22,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:05:22,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-08-27 13:05:22,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:05:22,842 INFO L124 PetriNetUnfolderBase]: 38/100 cut-off events. [2023-08-27 13:05:22,842 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-27 13:05:22,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 100 events. 38/100 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 281 event pairs, 2 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 169. Up to 38 conditions per place. [2023-08-27 13:05:22,845 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 32 selfloop transitions, 6 changer transitions 7/45 dead transitions. [2023-08-27 13:05:22,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 45 transitions, 228 flow [2023-08-27 13:05:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:05:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:05:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 454 transitions. [2023-08-27 13:05:22,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758909853249476 [2023-08-27 13:05:22,858 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 454 transitions. [2023-08-27 13:05:22,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 454 transitions. [2023-08-27 13:05:22,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:05:22,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 454 transitions. [2023-08-27 13:05:22,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 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) [2023-08-27 13:05:22,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:22,870 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:22,872 INFO L175 Difference]: Start difference. First operand has 26 places, 16 transitions, 50 flow. Second operand 6 states and 454 transitions. [2023-08-27 13:05:22,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 45 transitions, 228 flow [2023-08-27 13:05:22,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 13:05:22,876 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 71 flow [2023-08-27 13:05:22,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-27 13:05:22,880 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-08-27 13:05:22,880 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 71 flow [2023-08-27 13:05:22,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:22,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:05:22,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:05:22,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 13:05:22,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 13:05:22,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:05:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash 941128443, now seen corresponding path program 2 times [2023-08-27 13:05:22,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:05:22,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385085805] [2023-08-27 13:05:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:05:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:05:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:05:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:05:23,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:05:23,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385085805] [2023-08-27 13:05:23,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385085805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:05:23,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:05:23,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 13:05:23,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163910480] [2023-08-27 13:05:23,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:05:23,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:05:23,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:05:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:05:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:05:23,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-08-27 13:05:23,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:23,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:05:23,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-08-27 13:05:23,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:05:23,814 INFO L124 PetriNetUnfolderBase]: 38/116 cut-off events. [2023-08-27 13:05:23,814 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-27 13:05:23,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 116 events. 38/116 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 410 event pairs, 6 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 309. Up to 58 conditions per place. [2023-08-27 13:05:23,816 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 30 selfloop transitions, 7 changer transitions 9/46 dead transitions. [2023-08-27 13:05:23,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 235 flow [2023-08-27 13:05:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:05:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:05:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 454 transitions. [2023-08-27 13:05:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758909853249476 [2023-08-27 13:05:23,820 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 454 transitions. [2023-08-27 13:05:23,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 454 transitions. [2023-08-27 13:05:23,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:05:23,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 454 transitions. [2023-08-27 13:05:23,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 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) [2023-08-27 13:05:23,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:23,825 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:23,825 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 71 flow. Second operand 6 states and 454 transitions. [2023-08-27 13:05:23,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 235 flow [2023-08-27 13:05:23,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 231 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 13:05:23,827 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 100 flow [2023-08-27 13:05:23,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-08-27 13:05:23,828 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-08-27 13:05:23,828 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 100 flow [2023-08-27 13:05:23,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:23,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:05:23,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:05:23,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 13:05:23,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 13:05:23,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:05:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 853745585, now seen corresponding path program 3 times [2023-08-27 13:05:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:05:23,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244688786] [2023-08-27 13:05:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:05:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:05:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:05:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:05:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:05:24,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244688786] [2023-08-27 13:05:24,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244688786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:05:24,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:05:24,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 13:05:24,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487274642] [2023-08-27 13:05:24,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:05:24,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:05:24,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:05:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:05:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:05:24,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-08-27 13:05:24,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:24,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:05:24,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-08-27 13:05:24,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:05:24,976 INFO L124 PetriNetUnfolderBase]: 33/103 cut-off events. [2023-08-27 13:05:24,976 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-08-27 13:05:24,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 103 events. 33/103 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 345 event pairs, 2 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 334. Up to 51 conditions per place. [2023-08-27 13:05:24,981 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 27 selfloop transitions, 6 changer transitions 11/44 dead transitions. [2023-08-27 13:05:24,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 257 flow [2023-08-27 13:05:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:05:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:05:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 452 transitions. [2023-08-27 13:05:24,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47379454926624737 [2023-08-27 13:05:24,984 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 452 transitions. [2023-08-27 13:05:24,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 452 transitions. [2023-08-27 13:05:24,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:05:24,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 452 transitions. [2023-08-27 13:05:24,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.33333333333333) internal successors, (452), 6 states have internal predecessors, (452), 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) [2023-08-27 13:05:24,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:24,989 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:24,989 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 100 flow. Second operand 6 states and 452 transitions. [2023-08-27 13:05:24,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 257 flow [2023-08-27 13:05:24,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 44 transitions, 243 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-27 13:05:24,994 INFO L231 Difference]: Finished difference. Result has 38 places, 20 transitions, 100 flow [2023-08-27 13:05:24,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=20} [2023-08-27 13:05:24,996 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-08-27 13:05:24,996 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 20 transitions, 100 flow [2023-08-27 13:05:24,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:24,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:05:24,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:05:24,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 13:05:25,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 13:05:25,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:05:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1292979051, now seen corresponding path program 4 times [2023-08-27 13:05:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:05:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714053071] [2023-08-27 13:05:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:05:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:05:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:05:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:05:25,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:05:25,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714053071] [2023-08-27 13:05:25,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714053071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:05:25,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:05:25,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 13:05:25,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205371839] [2023-08-27 13:05:25,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:05:25,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:05:25,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:05:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:05:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:05:25,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-08-27 13:05:25,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 20 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:25,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:05:25,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-08-27 13:05:25,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:05:26,103 INFO L124 PetriNetUnfolderBase]: 17/59 cut-off events. [2023-08-27 13:05:26,104 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-08-27 13:05:26,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 59 events. 17/59 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 134 event pairs, 0 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 205. Up to 20 conditions per place. [2023-08-27 13:05:26,104 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 18 selfloop transitions, 5 changer transitions 13/36 dead transitions. [2023-08-27 13:05:26,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 219 flow [2023-08-27 13:05:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:05:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:05:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 444 transitions. [2023-08-27 13:05:26,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-08-27 13:05:26,106 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 444 transitions. [2023-08-27 13:05:26,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 444 transitions. [2023-08-27 13:05:26,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:05:26,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 444 transitions. [2023-08-27 13:05:26,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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) [2023-08-27 13:05:26,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:26,110 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:26,110 INFO L175 Difference]: Start difference. First operand has 38 places, 20 transitions, 100 flow. Second operand 6 states and 444 transitions. [2023-08-27 13:05:26,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 219 flow [2023-08-27 13:05:26,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 202 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 13:05:26,112 INFO L231 Difference]: Finished difference. Result has 37 places, 18 transitions, 81 flow [2023-08-27 13:05:26,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=81, PETRI_PLACES=37, PETRI_TRANSITIONS=18} [2023-08-27 13:05:26,113 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2023-08-27 13:05:26,113 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 18 transitions, 81 flow [2023-08-27 13:05:26,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:26,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:05:26,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:05:26,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 13:05:26,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 13:05:26,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:05:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1562975977, now seen corresponding path program 5 times [2023-08-27 13:05:26,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:05:26,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171723729] [2023-08-27 13:05:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:05:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:05:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:05:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:05:26,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:05:26,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171723729] [2023-08-27 13:05:26,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171723729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:05:26,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:05:26,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 13:05:26,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523703697] [2023-08-27 13:05:26,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:05:26,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:05:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:05:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:05:26,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:05:26,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-08-27 13:05:26,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 18 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:26,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:05:26,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-08-27 13:05:26,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:05:27,310 INFO L124 PetriNetUnfolderBase]: 8/40 cut-off events. [2023-08-27 13:05:27,310 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-27 13:05:27,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 40 events. 8/40 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 134. Up to 19 conditions per place. [2023-08-27 13:05:27,311 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 15 selfloop transitions, 3 changer transitions 12/30 dead transitions. [2023-08-27 13:05:27,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 178 flow [2023-08-27 13:05:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:05:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:05:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 439 transitions. [2023-08-27 13:05:27,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46016771488469604 [2023-08-27 13:05:27,313 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 439 transitions. [2023-08-27 13:05:27,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 439 transitions. [2023-08-27 13:05:27,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:05:27,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 439 transitions. [2023-08-27 13:05:27,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.16666666666667) internal successors, (439), 6 states have internal predecessors, (439), 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) [2023-08-27 13:05:27,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:27,316 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:27,316 INFO L175 Difference]: Start difference. First operand has 37 places, 18 transitions, 81 flow. Second operand 6 states and 439 transitions. [2023-08-27 13:05:27,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 178 flow [2023-08-27 13:05:27,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 144 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-08-27 13:05:27,318 INFO L231 Difference]: Finished difference. Result has 33 places, 16 transitions, 56 flow [2023-08-27 13:05:27,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=56, PETRI_PLACES=33, PETRI_TRANSITIONS=16} [2023-08-27 13:05:27,319 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-27 13:05:27,319 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 56 flow [2023-08-27 13:05:27,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:27,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:05:27,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:05:27,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 13:05:27,320 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-27 13:05:27,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:05:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2134430783, now seen corresponding path program 6 times [2023-08-27 13:05:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:05:27,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067893157] [2023-08-27 13:05:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:05:27,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:05:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:05:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:05:27,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:05:27,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067893157] [2023-08-27 13:05:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067893157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:05:27,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:05:27,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 13:05:27,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145188690] [2023-08-27 13:05:27,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:05:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:05:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:05:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:05:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:05:28,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-08-27 13:05:28,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 16 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:28,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:05:28,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-08-27 13:05:28,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:05:28,377 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-08-27 13:05:28,377 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 13:05:28,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 21 events. 3/21 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 1/22 useless extension candidates. Maximal degree in co-relation 62. Up to 8 conditions per place. [2023-08-27 13:05:28,377 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-27 13:05:28,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 18 transitions, 94 flow [2023-08-27 13:05:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:05:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:05:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2023-08-27 13:05:28,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44758909853249473 [2023-08-27 13:05:28,379 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 427 transitions. [2023-08-27 13:05:28,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 427 transitions. [2023-08-27 13:05:28,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:05:28,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 427 transitions. [2023-08-27 13:05:28,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 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) [2023-08-27 13:05:28,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:28,382 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 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) [2023-08-27 13:05:28,382 INFO L175 Difference]: Start difference. First operand has 33 places, 16 transitions, 56 flow. Second operand 6 states and 427 transitions. [2023-08-27 13:05:28,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 18 transitions, 94 flow [2023-08-27 13:05:28,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 18 transitions, 82 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-27 13:05:28,383 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-27 13:05:28,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-27 13:05:28,384 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-27 13:05:28,384 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-27 13:05:28,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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) [2023-08-27 13:05:28,389 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2023-08-27 13:05:28,389 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-27 13:05:28,389 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-27 13:05:28,389 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-27 13:05:28,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 13:05:28,390 INFO L445 BasicCegarLoop]: Path program histogram: [6] [2023-08-27 13:05:28,392 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 13:05:28,392 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 13:05:28,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 01:05:28 BasicIcfg [2023-08-27 13:05:28,396 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 13:05:28,397 INFO L158 Benchmark]: Toolchain (without parser) took 10933.83ms. Allocated memory was 392.2MB in the beginning and 591.4MB in the end (delta: 199.2MB). Free memory was 368.7MB in the beginning and 392.1MB in the end (delta: -23.3MB). Peak memory consumption was 177.1MB. Max. memory is 16.0GB. [2023-08-27 13:05:28,397 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 392.2MB. Free memory is still 368.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 13:05:28,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.22ms. Allocated memory is still 392.2MB. Free memory was 368.3MB in the beginning and 357.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 13:05:28,404 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.08ms. Allocated memory is still 392.2MB. Free memory was 357.6MB in the beginning and 356.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 13:05:28,404 INFO L158 Benchmark]: Boogie Preprocessor took 33.53ms. Allocated memory is still 392.2MB. Free memory was 356.0MB in the beginning and 354.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 13:05:28,404 INFO L158 Benchmark]: RCFGBuilder took 377.11ms. Allocated memory is still 392.2MB. Free memory was 354.8MB in the beginning and 341.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 13:05:28,405 INFO L158 Benchmark]: TraceAbstraction took 10211.32ms. Allocated memory was 392.2MB in the beginning and 591.4MB in the end (delta: 199.2MB). Free memory was 340.8MB in the beginning and 392.1MB in the end (delta: -51.2MB). Peak memory consumption was 149.8MB. Max. memory is 16.0GB. [2023-08-27 13:05:28,406 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 392.2MB. Free memory is still 368.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 263.22ms. Allocated memory is still 392.2MB. Free memory was 368.3MB in the beginning and 357.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.08ms. Allocated memory is still 392.2MB. Free memory was 357.6MB in the beginning and 356.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.53ms. Allocated memory is still 392.2MB. Free memory was 356.0MB in the beginning and 354.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 377.11ms. Allocated memory is still 392.2MB. Free memory was 354.8MB in the beginning and 341.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 10211.32ms. Allocated memory was 392.2MB in the beginning and 591.4MB in the end (delta: 199.2MB). Free memory was 340.8MB in the beginning and 392.1MB in the end (delta: -51.2MB). Peak memory consumption was 149.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 85 PlacesBefore, 26 PlacesAfterwards, 77 TransitionsBefore, 16 TransitionsAfterwards, 270 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 68 TotalNumberOfCompositions, 323 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 323, independent: 323, independent conditional: 0, independent unconditional: 323, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 149, independent: 149, independent conditional: 0, independent unconditional: 149, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 323, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 149, unknown conditional: 0, unknown unconditional: 149] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 105 locations, 4 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: 10.1s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 180 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 180 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 430 IncrementalHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 0 mSDtfsCounter, 430 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=2, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 2977 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-27 13:05:28,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...