/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/08_rand_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:18:50,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:18:50,754 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-SemanticLbe.epf [2023-11-17 11:18:50,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:18:50,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:18:50,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:18:50,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:18:50,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:18:50,787 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:18:50,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:18:50,791 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:18:50,791 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:18:50,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:18:50,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:18:50,793 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:18:50,793 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:18:50,793 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:18:50,794 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:18:50,794 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:18:50,794 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:18:50,794 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:18:50,795 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:18:50,795 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:18:50,795 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:18:50,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:18:50,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:18:50,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:18:50,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:18:50,796 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:18:50,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:18:50,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:18:50,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:18:50,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:18:50,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:18:51,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:18:51,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:18:51,020 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:18:51,021 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:18:51,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2023-11-17 11:18:52,263 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:18:52,490 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:18:52,490 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2023-11-17 11:18:52,504 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a5b34a4/710f83ef733c418bb03168ec6605048e/FLAG0aab2fed0 [2023-11-17 11:18:52,524 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a5b34a4/710f83ef733c418bb03168ec6605048e [2023-11-17 11:18:52,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:18:52,527 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:18:52,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:18:52,528 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:18:52,533 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:18:52,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:52,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9c3ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52, skipping insertion in model container [2023-11-17 11:18:52,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:52,583 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:18:52,872 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[30837,30850] [2023-11-17 11:18:52,884 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31185,31198] [2023-11-17 11:18:52,888 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31448,31461] [2023-11-17 11:18:52,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:18:52,908 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:18:52,940 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[30837,30850] [2023-11-17 11:18:52,943 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31185,31198] [2023-11-17 11:18:52,944 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31448,31461] [2023-11-17 11:18:52,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:18:52,979 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:18:52,980 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:18:52,986 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:18:52,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52 WrapperNode [2023-11-17 11:18:52,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:18:52,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:18:52,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:18:52,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:18:52,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,021 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,044 INFO L138 Inliner]: procedures = 178, calls = 38, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 146 [2023-11-17 11:18:53,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:18:53,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:18:53,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:18:53,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:18:53,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,080 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:18:53,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:18:53,084 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:18:53,084 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:18:53,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (1/1) ... [2023-11-17 11:18:53,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:18:53,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:18:53,118 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) [2023-11-17 11:18:53,143 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 [2023-11-17 11:18:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:18:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:18:53,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:18:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:18:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:18:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:18:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:18:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:18:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:18:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:18:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:18:53,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:18:53,156 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:18:53,310 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:18:53,312 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:18:53,596 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:18:53,790 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:18:53,791 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 11:18:53,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:18:53 BoogieIcfgContainer [2023-11-17 11:18:53,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:18:53,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:18:53,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:18:53,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:18:53,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:18:52" (1/3) ... [2023-11-17 11:18:53,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e673d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:18:53, skipping insertion in model container [2023-11-17 11:18:53,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:18:52" (2/3) ... [2023-11-17 11:18:53,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e673d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:18:53, skipping insertion in model container [2023-11-17 11:18:53,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:18:53" (3/3) ... [2023-11-17 11:18:53,800 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2023-11-17 11:18:53,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:18:53,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-17 11:18:53,816 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:18:53,866 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:18:53,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 102 flow [2023-11-17 11:18:53,919 INFO L124 PetriNetUnfolderBase]: 10/51 cut-off events. [2023-11-17 11:18:53,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:18:53,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 51 events. 10/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 46. Up to 3 conditions per place. [2023-11-17 11:18:53,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 102 flow [2023-11-17 11:18:53,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 49 transitions, 102 flow [2023-11-17 11:18:53,937 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:18:53,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 49 transitions, 102 flow [2023-11-17 11:18:53,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 49 transitions, 102 flow [2023-11-17 11:18:53,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 102 flow [2023-11-17 11:18:53,979 INFO L124 PetriNetUnfolderBase]: 10/51 cut-off events. [2023-11-17 11:18:53,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:18:53,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 51 events. 10/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 46. Up to 3 conditions per place. [2023-11-17 11:18:53,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 344 [2023-11-17 11:18:56,065 INFO L134 LiptonReduction]: Checked pairs total: 614 [2023-11-17 11:18:56,065 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-11-17 11:18:56,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:18:56,101 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=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;@33d797a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:18:56,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:18:56,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:18:56,108 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 11:18:56,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:18:56,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:56,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:18:56,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:18:56,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 420575645, now seen corresponding path program 1 times [2023-11-17 11:18:56,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791741065] [2023-11-17 11:18:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:18:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:18:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791741065] [2023-11-17 11:18:56,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791741065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:18:56,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:18:56,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:18:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813550940] [2023-11-17 11:18:56,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:18:56,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:18:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:18:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:18:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:18:56,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 95 [2023-11-17 11:18:56,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) [2023-11-17 11:18:56,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:18:56,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 95 [2023-11-17 11:18:56,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:18:56,573 INFO L124 PetriNetUnfolderBase]: 28/61 cut-off events. [2023-11-17 11:18:56,574 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:18:56,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 61 events. 28/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 142 event pairs, 14 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 112. Up to 53 conditions per place. [2023-11-17 11:18:56,576 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-17 11:18:56,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 21 transitions, 86 flow [2023-11-17 11:18:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:18:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:18:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2023-11-17 11:18:56,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.312280701754386 [2023-11-17 11:18:56,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2023-11-17 11:18:56,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2023-11-17 11:18:56,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:18:56,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2023-11-17 11:18:56,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 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) [2023-11-17 11:18:56,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2023-11-17 11:18:56,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2023-11-17 11:18:56,605 INFO L175 Difference]: Start difference. First operand has 18 places, 21 transitions, 46 flow. Second operand 3 states and 89 transitions. [2023-11-17 11:18:56,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 21 transitions, 86 flow [2023-11-17 11:18:56,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:18:56,610 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 52 flow [2023-11-17 11:18:56,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-17 11:18:56,617 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 2 predicate places. [2023-11-17 11:18:56,617 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 52 flow [2023-11-17 11:18:56,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) [2023-11-17 11:18:56,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:56,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:18:56,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:18:56,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:18:56,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:56,626 INFO L85 PathProgramCache]: Analyzing trace with hash 152820191, now seen corresponding path program 1 times [2023-11-17 11:18:56,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:56,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351948950] [2023-11-17 11:18:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:18:56,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:18:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:18:56,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:18:56,663 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:18:56,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:18:56,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:18:56,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 11:18:56,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:18:56,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:18:56,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:18:56,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:18:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:18:56,668 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:18:56,670 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:18:56,670 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:18:56,699 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:18:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 93 transitions, 196 flow [2023-11-17 11:18:56,725 INFO L124 PetriNetUnfolderBase]: 20/98 cut-off events. [2023-11-17 11:18:56,726 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:18:56,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 98 events. 20/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 89. Up to 3 conditions per place. [2023-11-17 11:18:56,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 93 transitions, 196 flow [2023-11-17 11:18:56,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 93 transitions, 196 flow [2023-11-17 11:18:56,729 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:18:56,729 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 93 transitions, 196 flow [2023-11-17 11:18:56,730 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 93 transitions, 196 flow [2023-11-17 11:18:56,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 93 transitions, 196 flow [2023-11-17 11:18:56,742 INFO L124 PetriNetUnfolderBase]: 20/98 cut-off events. [2023-11-17 11:18:56,742 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:18:56,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 98 events. 20/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 89. Up to 3 conditions per place. [2023-11-17 11:18:56,746 INFO L119 LiptonReduction]: Number of co-enabled transitions 4472 [2023-11-17 11:18:58,916 INFO L134 LiptonReduction]: Checked pairs total: 9280 [2023-11-17 11:18:58,916 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-11-17 11:18:58,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:18:58,919 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=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;@33d797a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:18:58,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-17 11:18:58,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:18:58,927 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-17 11:18:58,927 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:18:58,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:58,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:18:58,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:18:58,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:58,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1733521654, now seen corresponding path program 1 times [2023-11-17 11:18:58,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:58,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913654586] [2023-11-17 11:18:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:58,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:18:59,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:18:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913654586] [2023-11-17 11:18:59,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913654586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:18:59,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:18:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:18:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398150637] [2023-11-17 11:18:59,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:18:59,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:18:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:18:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:18:59,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:18:59,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 176 [2023-11-17 11:18:59,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-17 11:18:59,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:18:59,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 176 [2023-11-17 11:18:59,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:18:59,437 INFO L124 PetriNetUnfolderBase]: 1569/2402 cut-off events. [2023-11-17 11:18:59,437 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-17 11:18:59,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4821 conditions, 2402 events. 1569/2402 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10842 event pairs, 815 based on Foata normal form. 0/1728 useless extension candidates. Maximal degree in co-relation 2515. Up to 1888 conditions per place. [2023-11-17 11:18:59,455 INFO L140 encePairwiseOnDemand]: 164/176 looper letters, 71 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-17 11:18:59,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 325 flow [2023-11-17 11:18:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:18:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:18:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-11-17 11:18:59,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996212121212121 [2023-11-17 11:18:59,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-11-17 11:18:59,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-11-17 11:18:59,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:18:59,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-11-17 11:18:59,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2023-11-17 11:18:59,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-17 11:18:59,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-11-17 11:18:59,461 INFO L175 Difference]: Start difference. First operand has 41 places, 48 transitions, 106 flow. Second operand 3 states and 211 transitions. [2023-11-17 11:18:59,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 325 flow [2023-11-17 11:18:59,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 79 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:18:59,463 INFO L231 Difference]: Finished difference. Result has 44 places, 48 transitions, 140 flow [2023-11-17 11:18:59,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=44, PETRI_TRANSITIONS=48} [2023-11-17 11:18:59,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-11-17 11:18:59,465 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 48 transitions, 140 flow [2023-11-17 11:18:59,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-17 11:18:59,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:59,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:18:59,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:18:59,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:18:59,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2036106959, now seen corresponding path program 1 times [2023-11-17 11:18:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484258361] [2023-11-17 11:18:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:18:59,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:18:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:18:59,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:18:59,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:18:59,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-17 11:18:59,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-11-17 11:18:59,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-11-17 11:18:59,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-11-17 11:18:59,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-11-17 11:18:59,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-11-17 11:18:59,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-11-17 11:18:59,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-11-17 11:18:59,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-11-17 11:18:59,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-11-17 11:18:59,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:18:59,495 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:18:59,496 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:18:59,496 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:18:59,539 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:18:59,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 137 transitions, 292 flow [2023-11-17 11:18:59,568 INFO L124 PetriNetUnfolderBase]: 30/145 cut-off events. [2023-11-17 11:18:59,568 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:18:59,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 30/145 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 503 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 132. Up to 4 conditions per place. [2023-11-17 11:18:59,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 137 transitions, 292 flow [2023-11-17 11:18:59,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 137 transitions, 292 flow [2023-11-17 11:18:59,572 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:18:59,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 137 transitions, 292 flow [2023-11-17 11:18:59,573 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 137 transitions, 292 flow [2023-11-17 11:18:59,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 137 transitions, 292 flow [2023-11-17 11:18:59,586 INFO L124 PetriNetUnfolderBase]: 30/145 cut-off events. [2023-11-17 11:18:59,586 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:18:59,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 30/145 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 503 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 132. Up to 4 conditions per place. [2023-11-17 11:18:59,593 INFO L119 LiptonReduction]: Number of co-enabled transitions 12384 [2023-11-17 11:19:06,762 INFO L134 LiptonReduction]: Checked pairs total: 25298 [2023-11-17 11:19:06,762 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-11-17 11:19:06,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:06,768 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=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;@33d797a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:06,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-17 11:19:06,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:06,772 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2023-11-17 11:19:06,772 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:06,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:06,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:06,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 11:19:06,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash 614836483, now seen corresponding path program 1 times [2023-11-17 11:19:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:06,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225477863] [2023-11-17 11:19:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:06,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225477863] [2023-11-17 11:19:06,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225477863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:06,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:06,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:06,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106984798] [2023-11-17 11:19:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:06,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:06,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:06,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:06,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 257 [2023-11-17 11:19:06,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 70 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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) [2023-11-17 11:19:06,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:06,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 257 [2023-11-17 11:19:06,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:11,529 INFO L124 PetriNetUnfolderBase]: 41790/55463 cut-off events. [2023-11-17 11:19:11,530 INFO L125 PetriNetUnfolderBase]: For 2040/2040 co-relation queries the response was YES. [2023-11-17 11:19:11,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111680 conditions, 55463 events. 41790/55463 cut-off events. For 2040/2040 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 302341 event pairs, 20409 based on Foata normal form. 0/38561 useless extension candidates. Maximal degree in co-relation 24561. Up to 41124 conditions per place. [2023-11-17 11:19:11,984 INFO L140 encePairwiseOnDemand]: 240/257 looper letters, 106 selfloop transitions, 7 changer transitions 0/117 dead transitions. [2023-11-17 11:19:11,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 117 transitions, 490 flow [2023-11-17 11:19:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-11-17 11:19:11,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059662775616083 [2023-11-17 11:19:11,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-11-17 11:19:11,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-11-17 11:19:11,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:11,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-11-17 11:19:11,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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) [2023-11-17 11:19:11,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-11-17 11:19:11,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-11-17 11:19:11,998 INFO L175 Difference]: Start difference. First operand has 59 places, 70 transitions, 158 flow. Second operand 3 states and 313 transitions. [2023-11-17 11:19:11,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 117 transitions, 490 flow [2023-11-17 11:19:12,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 117 transitions, 486 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:12,005 INFO L231 Difference]: Finished difference. Result has 62 places, 70 transitions, 204 flow [2023-11-17 11:19:12,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=62, PETRI_TRANSITIONS=70} [2023-11-17 11:19:12,006 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-17 11:19:12,007 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 70 transitions, 204 flow [2023-11-17 11:19:12,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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) [2023-11-17 11:19:12,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:12,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:12,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:19:12,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 11:19:12,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1884951637, now seen corresponding path program 1 times [2023-11-17 11:19:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:12,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438229767] [2023-11-17 11:19:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:12,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:12,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438229767] [2023-11-17 11:19:12,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438229767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:12,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:12,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:12,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463778908] [2023-11-17 11:19:12,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:12,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:12,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 257 [2023-11-17 11:19:12,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-17 11:19:12,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:12,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 257 [2023-11-17 11:19:12,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:14,648 INFO L124 PetriNetUnfolderBase]: 28463/38868 cut-off events. [2023-11-17 11:19:14,649 INFO L125 PetriNetUnfolderBase]: For 10576/10576 co-relation queries the response was YES. [2023-11-17 11:19:14,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88478 conditions, 38868 events. 28463/38868 cut-off events. For 10576/10576 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 216056 event pairs, 9281 based on Foata normal form. 471/34400 useless extension candidates. Maximal degree in co-relation 65310. Up to 31011 conditions per place. [2023-11-17 11:19:14,926 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 100 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2023-11-17 11:19:14,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 108 transitions, 516 flow [2023-11-17 11:19:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-17 11:19:14,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.364461738002594 [2023-11-17 11:19:14,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-17 11:19:14,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-17 11:19:14,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:14,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-17 11:19:14,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2023-11-17 11:19:14,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-11-17 11:19:14,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-11-17 11:19:14,933 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 204 flow. Second operand 3 states and 281 transitions. [2023-11-17 11:19:14,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 108 transitions, 516 flow [2023-11-17 11:19:15,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 108 transitions, 496 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:19:15,014 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 222 flow [2023-11-17 11:19:15,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-11-17 11:19:15,017 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-11-17 11:19:15,017 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 222 flow [2023-11-17 11:19:15,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-17 11:19:15,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:15,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:15,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:19:15,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 11:19:15,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash -52721831, now seen corresponding path program 1 times [2023-11-17 11:19:15,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:15,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946183244] [2023-11-17 11:19:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:15,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:15,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:15,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946183244] [2023-11-17 11:19:15,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946183244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:15,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:15,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226297807] [2023-11-17 11:19:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:15,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:19:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:19:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:19:15,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 257 [2023-11-17 11:19:15,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 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) [2023-11-17 11:19:15,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:15,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 257 [2023-11-17 11:19:15,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:18,176 INFO L124 PetriNetUnfolderBase]: 29382/39887 cut-off events. [2023-11-17 11:19:18,177 INFO L125 PetriNetUnfolderBase]: For 10660/10660 co-relation queries the response was YES. [2023-11-17 11:19:18,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90426 conditions, 39887 events. 29382/39887 cut-off events. For 10660/10660 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 222909 event pairs, 11706 based on Foata normal form. 920/34447 useless extension candidates. Maximal degree in co-relation 74525. Up to 21949 conditions per place. [2023-11-17 11:19:18,449 INFO L140 encePairwiseOnDemand]: 247/257 looper letters, 110 selfloop transitions, 13 changer transitions 0/127 dead transitions. [2023-11-17 11:19:18,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 127 transitions, 608 flow [2023-11-17 11:19:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:19:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:19:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2023-11-17 11:19:18,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35019455252918286 [2023-11-17 11:19:18,451 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2023-11-17 11:19:18,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2023-11-17 11:19:18,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:18,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2023-11-17 11:19:18,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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) [2023-11-17 11:19:18,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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) [2023-11-17 11:19:18,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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) [2023-11-17 11:19:18,455 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 222 flow. Second operand 4 states and 360 transitions. [2023-11-17 11:19:18,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 127 transitions, 608 flow [2023-11-17 11:19:18,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 127 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:19:18,467 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 317 flow [2023-11-17 11:19:18,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-11-17 11:19:18,469 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2023-11-17 11:19:18,469 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 317 flow [2023-11-17 11:19:18,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 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) [2023-11-17 11:19:18,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:18,470 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:19:18,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:19:18,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 11:19:18,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 200674750, now seen corresponding path program 1 times [2023-11-17 11:19:18,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:18,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627841807] [2023-11-17 11:19:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:18,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:18,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:18,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:18,514 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:18,514 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-17 11:19:18,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2023-11-17 11:19:18,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2023-11-17 11:19:18,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2023-11-17 11:19:18,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2023-11-17 11:19:18,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:19:18,516 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:19:18,517 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:18,517 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:19:18,565 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:18,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 181 transitions, 390 flow [2023-11-17 11:19:18,595 INFO L124 PetriNetUnfolderBase]: 40/192 cut-off events. [2023-11-17 11:19:18,595 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:18,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 192 events. 40/192 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 752 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 175. Up to 5 conditions per place. [2023-11-17 11:19:18,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 181 transitions, 390 flow [2023-11-17 11:19:18,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 181 transitions, 390 flow [2023-11-17 11:19:18,600 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:18,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 181 transitions, 390 flow [2023-11-17 11:19:18,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 181 transitions, 390 flow [2023-11-17 11:19:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 181 transitions, 390 flow [2023-11-17 11:19:18,620 INFO L124 PetriNetUnfolderBase]: 40/192 cut-off events. [2023-11-17 11:19:18,620 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:18,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 192 events. 40/192 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 752 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 175. Up to 5 conditions per place. [2023-11-17 11:19:18,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 24080 [2023-11-17 11:19:23,563 INFO L134 LiptonReduction]: Checked pairs total: 50281 [2023-11-17 11:19:23,564 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-11-17 11:19:23,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:23,569 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=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;@33d797a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:23,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-17 11:19:23,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:23,572 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 11:19:23,572 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:23,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:23,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:23,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-11-17 11:19:23,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash -598490404, now seen corresponding path program 1 times [2023-11-17 11:19:23,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:23,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135123048] [2023-11-17 11:19:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:23,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:23,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135123048] [2023-11-17 11:19:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135123048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:23,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:23,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124334000] [2023-11-17 11:19:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:23,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:23,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 343 [2023-11-17 11:19:23,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 91 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2023-11-17 11:19:23,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:23,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 343 [2023-11-17 11:19:23,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand