/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:10:32,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:10:32,445 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 15:10:32,469 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:10:32,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:10:32,470 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:10:32,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:10:32,471 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:10:32,471 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:10:32,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:10:32,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:10:32,472 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:10:32,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:10:32,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:10:32,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:10:32,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:10:32,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:10:32,474 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:10:32,475 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:10:32,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:10:32,475 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:10:32,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:10:32,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:10:32,477 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:10:32,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:10:32,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:32,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:10:32,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:10:32,479 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:10:32,479 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:10:32,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:10:32,480 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:10:32,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:10:32,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:10:32,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:10:32,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:10:32,707 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:10:32,709 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:10:32,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2023-11-17 15:10:33,969 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:10:34,190 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:10:34,192 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2023-11-17 15:10:34,201 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dec48f416/3f13d3dae3da45daa7b3e6ea9d949155/FLAG97c9aba58 [2023-11-17 15:10:34,213 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dec48f416/3f13d3dae3da45daa7b3e6ea9d949155 [2023-11-17 15:10:34,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:10:34,216 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:10:34,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:34,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:10:34,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:10:34,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c51445c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34, skipping insertion in model container [2023-11-17 15:10:34,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,268 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:10:34,538 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/40_barrier_vf-pthread.i[30842,30855] [2023-11-17 15:10:34,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:34,567 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:10:34,612 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/40_barrier_vf-pthread.i[30842,30855] [2023-11-17 15:10:34,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:34,664 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:10:34,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34 WrapperNode [2023-11-17 15:10:34,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:34,667 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:34,667 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:10:34,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:10:34,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,702 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-17 15:10:34,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:34,704 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:10:34,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:10:34,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:10:34,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,733 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,736 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:10:34,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:10:34,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:10:34,742 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:10:34,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (1/1) ... [2023-11-17 15:10:34,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:10:34,782 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 15:10:34,801 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 15:10:34,812 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:10:34,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:10:34,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:10:34,812 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:10:34,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:10:34,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:10:34,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:10:34,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:10:34,813 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:10:34,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:10:34,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:10:34,815 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 15:10:34,969 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:10:34,971 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:10:35,136 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:10:35,157 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:10:35,158 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 15:10:35,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:35 BoogieIcfgContainer [2023-11-17 15:10:35,159 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:10:35,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:10:35,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:10:35,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:10:35,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:10:34" (1/3) ... [2023-11-17 15:10:35,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77746a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:35, skipping insertion in model container [2023-11-17 15:10:35,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:34" (2/3) ... [2023-11-17 15:10:35,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77746a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:35, skipping insertion in model container [2023-11-17 15:10:35,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:35" (3/3) ... [2023-11-17 15:10:35,165 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2023-11-17 15:10:35,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:10:35,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:10:35,179 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:10:35,224 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:35,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 72 transitions, 148 flow [2023-11-17 15:10:35,296 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-11-17 15:10:35,297 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:35,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 78 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-11-17 15:10:35,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 72 transitions, 148 flow [2023-11-17 15:10:35,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 72 transitions, 148 flow [2023-11-17 15:10:35,307 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:35,325 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 72 transitions, 148 flow [2023-11-17 15:10:35,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 72 transitions, 148 flow [2023-11-17 15:10:35,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 72 transitions, 148 flow [2023-11-17 15:10:35,384 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-11-17 15:10:35,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:35,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 78 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-11-17 15:10:35,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2023-11-17 15:10:37,840 INFO L134 LiptonReduction]: Checked pairs total: 604 [2023-11-17 15:10:37,841 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-11-17 15:10:37,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:37,860 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;@218ea37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:37,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:10:37,864 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:37,864 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2023-11-17 15:10:37,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:37,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:37,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:10:37,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:37,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash 298810759, now seen corresponding path program 1 times [2023-11-17 15:10:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:37,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044774487] [2023-11-17 15:10:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:37,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:38,112 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 15:10:38,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:38,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044774487] [2023-11-17 15:10:38,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044774487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:38,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:38,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:38,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611872044] [2023-11-17 15:10:38,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:38,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:38,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:38,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 141 [2023-11-17 15:10:38,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 12 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 15:10:38,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:38,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 141 [2023-11-17 15:10:38,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:38,171 INFO L124 PetriNetUnfolderBase]: 7/22 cut-off events. [2023-11-17 15:10:38,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:38,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 22 events. 7/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 3/22 useless extension candidates. Maximal degree in co-relation 33. Up to 14 conditions per place. [2023-11-17 15:10:38,175 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 7 selfloop transitions, 2 changer transitions 0/11 dead transitions. [2023-11-17 15:10:38,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 11 transitions, 44 flow [2023-11-17 15:10:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-11-17 15:10:38,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42080378250591016 [2023-11-17 15:10:38,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-11-17 15:10:38,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-11-17 15:10:38,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:38,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-11-17 15:10:38,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 15:10:38,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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 15:10:38,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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 15:10:38,206 INFO L175 Difference]: Start difference. First operand has 13 places, 12 transitions, 28 flow. Second operand 3 states and 178 transitions. [2023-11-17 15:10:38,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 11 transitions, 44 flow [2023-11-17 15:10:38,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 11 transitions, 44 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:38,210 INFO L231 Difference]: Finished difference. Result has 13 places, 9 transitions, 26 flow [2023-11-17 15:10:38,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=13, PETRI_TRANSITIONS=9} [2023-11-17 15:10:38,217 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, 0 predicate places. [2023-11-17 15:10:38,217 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 9 transitions, 26 flow [2023-11-17 15:10:38,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 15:10:38,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:38,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:10:38,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:10:38,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:38,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash 673162230, now seen corresponding path program 1 times [2023-11-17 15:10:38,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:38,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989178627] [2023-11-17 15:10:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:38,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:38,249 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:38,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:38,276 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:38,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:10:38,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:10:38,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:10:38,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:10:38,280 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:38,282 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:38,282 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:10:38,299 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:38,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 210 flow [2023-11-17 15:10:38,340 INFO L124 PetriNetUnfolderBase]: 11/124 cut-off events. [2023-11-17 15:10:38,341 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:38,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 124 events. 11/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-11-17 15:10:38,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 100 transitions, 210 flow [2023-11-17 15:10:38,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 100 transitions, 210 flow [2023-11-17 15:10:38,343 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:38,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 100 transitions, 210 flow [2023-11-17 15:10:38,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 100 transitions, 210 flow [2023-11-17 15:10:38,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 210 flow [2023-11-17 15:10:38,378 INFO L124 PetriNetUnfolderBase]: 11/124 cut-off events. [2023-11-17 15:10:38,378 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:38,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 124 events. 11/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-11-17 15:10:38,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 3024 [2023-11-17 15:10:40,596 INFO L134 LiptonReduction]: Checked pairs total: 8273 [2023-11-17 15:10:40,596 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-11-17 15:10:40,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:40,600 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;@218ea37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:40,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:10:40,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:40,603 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-11-17 15:10:40,603 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:40,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:40,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:40,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:40,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash 828953029, now seen corresponding path program 1 times [2023-11-17 15:10:40,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:40,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43397573] [2023-11-17 15:10:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:40,696 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 15:10:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43397573] [2023-11-17 15:10:40,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43397573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:40,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:40,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:40,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192219480] [2023-11-17 15:10:40,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:40,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:40,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:40,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 178 [2023-11-17 15:10:40,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 15:10:40,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:40,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 178 [2023-11-17 15:10:40,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:40,834 INFO L124 PetriNetUnfolderBase]: 280/559 cut-off events. [2023-11-17 15:10:40,834 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:10:40,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 559 events. 280/559 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2977 event pairs, 119 based on Foata normal form. 22/525 useless extension candidates. Maximal degree in co-relation 310. Up to 241 conditions per place. [2023-11-17 15:10:40,841 INFO L140 encePairwiseOnDemand]: 170/178 looper letters, 38 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-11-17 15:10:40,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 197 flow [2023-11-17 15:10:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-11-17 15:10:40,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49812734082397003 [2023-11-17 15:10:40,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-11-17 15:10:40,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-11-17 15:10:40,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:40,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-11-17 15:10:40,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 15:10:40,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 15:10:40,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 15:10:40,852 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 82 flow. Second operand 3 states and 266 transitions. [2023-11-17 15:10:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 197 flow [2023-11-17 15:10:40,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:40,855 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 97 flow [2023-11-17 15:10:40,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-11-17 15:10:40,856 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-11-17 15:10:40,856 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 97 flow [2023-11-17 15:10:40,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 15:10:40,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:40,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:10:40,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:10:40,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:40,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:40,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1246165100, now seen corresponding path program 1 times [2023-11-17 15:10:40,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:40,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477406593] [2023-11-17 15:10:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:40,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:40,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:40,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:40,921 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:40,921 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:10:40,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:10:40,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:10:40,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:10:40,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:10:40,922 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:40,923 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:40,923 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:10:40,940 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:40,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 128 transitions, 274 flow [2023-11-17 15:10:40,959 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-11-17 15:10:40,960 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 16/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 371 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 128. Up to 8 conditions per place. [2023-11-17 15:10:40,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 128 transitions, 274 flow [2023-11-17 15:10:40,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 128 transitions, 274 flow [2023-11-17 15:10:40,962 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:40,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 128 transitions, 274 flow [2023-11-17 15:10:40,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 128 transitions, 274 flow [2023-11-17 15:10:40,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 128 transitions, 274 flow [2023-11-17 15:10:40,980 INFO L124 PetriNetUnfolderBase]: 16/165 cut-off events. [2023-11-17 15:10:40,980 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:40,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 16/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 371 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 128. Up to 8 conditions per place. [2023-11-17 15:10:40,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 6804 [2023-11-17 15:10:43,341 INFO L134 LiptonReduction]: Checked pairs total: 19993 [2023-11-17 15:10:43,341 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-11-17 15:10:43,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:43,344 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;@218ea37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:43,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:10:43,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:43,347 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2023-11-17 15:10:43,347 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:43,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:43,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:43,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:43,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:43,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2113013931, now seen corresponding path program 1 times [2023-11-17 15:10:43,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:43,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022168194] [2023-11-17 15:10:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:43,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:43,468 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 15:10:43,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022168194] [2023-11-17 15:10:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022168194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:43,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:43,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535100024] [2023-11-17 15:10:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:43,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:43,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:43,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:43,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 228 [2023-11-17 15:10:43,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 15:10:43,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:43,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 228 [2023-11-17 15:10:43,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:44,217 INFO L124 PetriNetUnfolderBase]: 5927/8726 cut-off events. [2023-11-17 15:10:44,217 INFO L125 PetriNetUnfolderBase]: For 679/679 co-relation queries the response was YES. [2023-11-17 15:10:44,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17271 conditions, 8726 events. 5927/8726 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 53032 event pairs, 1826 based on Foata normal form. 0/7896 useless extension candidates. Maximal degree in co-relation 2630. Up to 5450 conditions per place. [2023-11-17 15:10:44,310 INFO L140 encePairwiseOnDemand]: 217/228 looper letters, 57 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2023-11-17 15:10:44,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 296 flow [2023-11-17 15:10:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-11-17 15:10:44,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2023-11-17 15:10:44,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-11-17 15:10:44,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-11-17 15:10:44,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:44,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-11-17 15:10:44,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 15:10:44,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 15:10:44,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 15:10:44,316 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 120 flow. Second operand 3 states and 336 transitions. [2023-11-17 15:10:44,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 296 flow [2023-11-17 15:10:44,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 292 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:44,321 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 140 flow [2023-11-17 15:10:44,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-17 15:10:44,324 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-17 15:10:44,327 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 140 flow [2023-11-17 15:10:44,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 15:10:44,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:44,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:10:44,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:44,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -917682289, now seen corresponding path program 1 times [2023-11-17 15:10:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906924058] [2023-11-17 15:10:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:44,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:44,449 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 15:10:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906924058] [2023-11-17 15:10:44,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906924058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:44,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:44,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:10:44,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479574470] [2023-11-17 15:10:44,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:44,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:10:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:44,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:10:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:10:44,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 228 [2023-11-17 15:10:44,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 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 15:10:44,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:44,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 228 [2023-11-17 15:10:44,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:45,889 INFO L124 PetriNetUnfolderBase]: 11332/16993 cut-off events. [2023-11-17 15:10:45,890 INFO L125 PetriNetUnfolderBase]: For 1152/1176 co-relation queries the response was YES. [2023-11-17 15:10:45,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35062 conditions, 16993 events. 11332/16993 cut-off events. For 1152/1176 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 121943 event pairs, 2252 based on Foata normal form. 2/16220 useless extension candidates. Maximal degree in co-relation 32725. Up to 6405 conditions per place. [2023-11-17 15:10:46,019 INFO L140 encePairwiseOnDemand]: 217/228 looper letters, 129 selfloop transitions, 18 changer transitions 0/159 dead transitions. [2023-11-17 15:10:46,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 159 transitions, 702 flow [2023-11-17 15:10:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:10:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:10:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-11-17 15:10:46,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641812865497076 [2023-11-17 15:10:46,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-11-17 15:10:46,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-11-17 15:10:46,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:46,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-11-17 15:10:46,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 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 15:10:46,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 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 15:10:46,027 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 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 15:10:46,027 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 140 flow. Second operand 6 states and 635 transitions. [2023-11-17 15:10:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 159 transitions, 702 flow [2023-11-17 15:10:46,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 159 transitions, 698 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:46,033 INFO L231 Difference]: Finished difference. Result has 59 places, 71 transitions, 283 flow [2023-11-17 15:10:46,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=59, PETRI_TRANSITIONS=71} [2023-11-17 15:10:46,036 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2023-11-17 15:10:46,036 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 71 transitions, 283 flow [2023-11-17 15:10:46,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 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 15:10:46,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:46,037 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:10:46,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:10:46,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:46,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:46,038 INFO L85 PathProgramCache]: Analyzing trace with hash -71900541, now seen corresponding path program 1 times [2023-11-17 15:10:46,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:46,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698488426] [2023-11-17 15:10:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:46,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:46,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:46,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:46,075 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:46,075 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:10:46,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:10:46,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:10:46,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:10:46,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:10:46,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:10:46,076 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:10:46,077 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:46,078 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:10:46,107 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:46,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 340 flow [2023-11-17 15:10:46,191 INFO L124 PetriNetUnfolderBase]: 21/206 cut-off events. [2023-11-17 15:10:46,191 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:46,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 206 events. 21/206 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 511 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2023-11-17 15:10:46,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 156 transitions, 340 flow [2023-11-17 15:10:46,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 156 transitions, 340 flow [2023-11-17 15:10:46,194 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:46,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 156 transitions, 340 flow [2023-11-17 15:10:46,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 156 transitions, 340 flow [2023-11-17 15:10:46,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 340 flow [2023-11-17 15:10:46,211 INFO L124 PetriNetUnfolderBase]: 21/206 cut-off events. [2023-11-17 15:10:46,212 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:46,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 206 events. 21/206 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 511 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2023-11-17 15:10:46,219 INFO L119 LiptonReduction]: Number of co-enabled transitions 12096 [2023-11-17 15:10:48,711 INFO L134 LiptonReduction]: Checked pairs total: 37165 [2023-11-17 15:10:48,711 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-11-17 15:10:48,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:48,713 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;@218ea37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:48,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:48,716 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:48,716 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-11-17 15:10:48,716 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:48,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:48,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:48,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:48,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1316665013, now seen corresponding path program 1 times [2023-11-17 15:10:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138032019] [2023-11-17 15:10:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:48,795 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 15:10:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138032019] [2023-11-17 15:10:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138032019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:48,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37270978] [2023-11-17 15:10:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:48,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:48,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:48,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 276 [2023-11-17 15:10:48,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 15:10:48,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:48,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 276 [2023-11-17 15:10:48,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:55,103 INFO L124 PetriNetUnfolderBase]: 67907/91821 cut-off events. [2023-11-17 15:10:55,103 INFO L125 PetriNetUnfolderBase]: For 9683/9683 co-relation queries the response was YES. [2023-11-17 15:10:55,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182188 conditions, 91821 events. 67907/91821 cut-off events. For 9683/9683 co-relation queries the response was YES. Maximal size of possible extension queue 3888. Compared 635087 event pairs, 17043 based on Foata normal form. 2002/81871 useless extension candidates. Maximal degree in co-relation 15405. Up to 64731 conditions per place. [2023-11-17 15:10:55,764 INFO L140 encePairwiseOnDemand]: 262/276 looper letters, 76 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-11-17 15:10:55,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 401 flow [2023-11-17 15:10:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-11-17 15:10:55,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49033816425120774 [2023-11-17 15:10:55,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-11-17 15:10:55,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-11-17 15:10:55,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:55,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-11-17 15:10:55,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 15:10:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 15:10:55,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 15:10:55,770 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 160 flow. Second operand 3 states and 406 transitions. [2023-11-17 15:10:55,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 401 flow [2023-11-17 15:10:55,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 95 transitions, 389 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:55,781 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 183 flow [2023-11-17 15:10:55,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2023-11-17 15:10:55,783 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-11-17 15:10:55,783 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 183 flow [2023-11-17 15:10:55,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 15:10:55,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:55,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:10:55,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:55,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1705345223, now seen corresponding path program 1 times [2023-11-17 15:10:55,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:55,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184406357] [2023-11-17 15:10:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:55,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:55,861 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 15:10:55,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:55,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184406357] [2023-11-17 15:10:55,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184406357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:55,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:55,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:10:55,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330313750] [2023-11-17 15:10:55,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:55,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:10:55,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:10:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:10:55,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 276 [2023-11-17 15:10:55,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 95.8) internal successors, (479), 5 states have internal predecessors, (479), 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 15:10:55,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:55,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 276 [2023-11-17 15:10:55,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:12,381 INFO L124 PetriNetUnfolderBase]: 180242/247362 cut-off events. [2023-11-17 15:11:12,381 INFO L125 PetriNetUnfolderBase]: For 19932/20122 co-relation queries the response was YES. [2023-11-17 15:11:12,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510343 conditions, 247362 events. 180242/247362 cut-off events. For 19932/20122 co-relation queries the response was YES. Maximal size of possible extension queue 11949. Compared 1970250 event pairs, 38604 based on Foata normal form. 38/235404 useless extension candidates. Maximal degree in co-relation 473337. Up to 97582 conditions per place. [2023-11-17 15:11:14,287 INFO L140 encePairwiseOnDemand]: 262/276 looper letters, 177 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2023-11-17 15:11:14,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 217 transitions, 967 flow [2023-11-17 15:11:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:11:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:11:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 776 transitions. [2023-11-17 15:11:14,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46859903381642515 [2023-11-17 15:11:14,293 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 776 transitions. [2023-11-17 15:11:14,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 776 transitions. [2023-11-17 15:11:14,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:14,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 776 transitions. [2023-11-17 15:11:14,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.33333333333334) internal successors, (776), 6 states have internal predecessors, (776), 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 15:11:14,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 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 15:11:14,298 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 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 15:11:14,298 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 183 flow. Second operand 6 states and 776 transitions. [2023-11-17 15:11:14,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 217 transitions, 967 flow [2023-11-17 15:11:14,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 217 transitions, 962 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:11:14,339 INFO L231 Difference]: Finished difference. Result has 73 places, 94 transitions, 377 flow [2023-11-17 15:11:14,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=73, PETRI_TRANSITIONS=94} [2023-11-17 15:11:14,340 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2023-11-17 15:11:14,340 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 94 transitions, 377 flow [2023-11-17 15:11:14,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.8) internal successors, (479), 5 states have internal predecessors, (479), 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 15:11:14,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:14,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:14,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:11:14,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:11:14,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash -32113559, now seen corresponding path program 1 times [2023-11-17 15:11:14,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:14,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365773220] [2023-11-17 15:11:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:14,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:11:14,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:14,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365773220] [2023-11-17 15:11:14,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365773220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:14,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:14,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:11:14,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894174723] [2023-11-17 15:11:14,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:14,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:11:14,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:11:14,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:11:14,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 276 [2023-11-17 15:11:14,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 94 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 96.2) internal successors, (481), 5 states have internal predecessors, (481), 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 15:11:14,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:14,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 276 [2023-11-17 15:11:14,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:39,004 INFO L124 PetriNetUnfolderBase]: 238260/326268 cut-off events. [2023-11-17 15:11:39,004 INFO L125 PetriNetUnfolderBase]: For 187456/190767 co-relation queries the response was YES. [2023-11-17 15:11:40,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795436 conditions, 326268 events. 238260/326268 cut-off events. For 187456/190767 co-relation queries the response was YES. Maximal size of possible extension queue 16362. Compared 2665336 event pairs, 49633 based on Foata normal form. 6560/329651 useless extension candidates. Maximal degree in co-relation 451628. Up to 141968 conditions per place. [2023-11-17 15:11:42,790 INFO L140 encePairwiseOnDemand]: 261/276 looper letters, 216 selfloop transitions, 64 changer transitions 0/296 dead transitions. [2023-11-17 15:11:42,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 296 transitions, 1618 flow [2023-11-17 15:11:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 15:11:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 15:11:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 898 transitions. [2023-11-17 15:11:42,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648033126293996 [2023-11-17 15:11:42,820 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 898 transitions. [2023-11-17 15:11:42,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 898 transitions. [2023-11-17 15:11:42,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:42,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 898 transitions. [2023-11-17 15:11:42,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 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 15:11:42,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 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 15:11:42,826 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 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 15:11:42,826 INFO L175 Difference]: Start difference. First operand has 73 places, 94 transitions, 377 flow. Second operand 7 states and 898 transitions. [2023-11-17 15:11:42,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 296 transitions, 1618 flow [2023-11-17 15:11:43,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 296 transitions, 1618 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:43,708 INFO L231 Difference]: Finished difference. Result has 83 places, 140 transitions, 859 flow [2023-11-17 15:11:43,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=859, PETRI_PLACES=83, PETRI_TRANSITIONS=140} [2023-11-17 15:11:43,725 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 16 predicate places. [2023-11-17 15:11:43,725 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 140 transitions, 859 flow [2023-11-17 15:11:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.2) internal successors, (481), 5 states have internal predecessors, (481), 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 15:11:43,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:43,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:43,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:11:43,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:11:43,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1343485792, now seen corresponding path program 1 times [2023-11-17 15:11:43,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:43,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489534056] [2023-11-17 15:11:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:43,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:11:43,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489534056] [2023-11-17 15:11:43,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489534056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:43,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:43,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:11:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66652440] [2023-11-17 15:11:43,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:43,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:43,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:43,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 276 [2023-11-17 15:11:43,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 140 transitions, 859 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 15:11:43,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:43,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 276 [2023-11-17 15:11:43,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:45,535 INFO L124 PetriNetUnfolderBase]: 8836/17116 cut-off events. [2023-11-17 15:11:45,535 INFO L125 PetriNetUnfolderBase]: For 9118/9118 co-relation queries the response was YES. [2023-11-17 15:11:45,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40534 conditions, 17116 events. 8836/17116 cut-off events. For 9118/9118 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 161161 event pairs, 1585 based on Foata normal form. 4464/21474 useless extension candidates. Maximal degree in co-relation 30367. Up to 8295 conditions per place. [2023-11-17 15:11:45,675 INFO L140 encePairwiseOnDemand]: 256/276 looper letters, 31 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2023-11-17 15:11:45,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 85 transitions, 504 flow [2023-11-17 15:11:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:11:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:11:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-17 15:11:45,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47101449275362317 [2023-11-17 15:11:45,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-17 15:11:45,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-17 15:11:45,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:45,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-17 15:11:45,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 15:11:45,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 15:11:45,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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 15:11:45,690 INFO L175 Difference]: Start difference. First operand has 83 places, 140 transitions, 859 flow. Second operand 3 states and 390 transitions. [2023-11-17 15:11:45,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 85 transitions, 504 flow [2023-11-17 15:11:45,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 85 transitions, 441 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-11-17 15:11:45,777 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 350 flow [2023-11-17 15:11:45,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-11-17 15:11:45,779 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 13 predicate places. [2023-11-17 15:11:45,779 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 350 flow [2023-11-17 15:11:45,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 15:11:45,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:45,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:45,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:11:45,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:11:45,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1792570739, now seen corresponding path program 1 times [2023-11-17 15:11:45,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:45,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224651213] [2023-11-17 15:11:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:45,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:45,820 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:45,852 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:45,852 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:45,852 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:11:45,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:11:45,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:11:45,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:11:45,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:11:45,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:11:45,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:11:45,854 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-17 15:11:45,854 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:45,854 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:11:45,879 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:45,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 184 transitions, 408 flow [2023-11-17 15:11:45,901 INFO L124 PetriNetUnfolderBase]: 26/247 cut-off events. [2023-11-17 15:11:45,902 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:45,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 247 events. 26/247 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 649 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 219. Up to 12 conditions per place. [2023-11-17 15:11:45,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 184 transitions, 408 flow [2023-11-17 15:11:45,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 184 transitions, 408 flow [2023-11-17 15:11:45,905 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:45,905 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 184 transitions, 408 flow [2023-11-17 15:11:45,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 184 transitions, 408 flow [2023-11-17 15:11:45,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 184 transitions, 408 flow [2023-11-17 15:11:45,941 INFO L124 PetriNetUnfolderBase]: 26/247 cut-off events. [2023-11-17 15:11:45,941 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:45,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 247 events. 26/247 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 649 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 219. Up to 12 conditions per place. [2023-11-17 15:11:45,953 INFO L119 LiptonReduction]: Number of co-enabled transitions 18900 [2023-11-17 15:11:49,275 INFO L134 LiptonReduction]: Checked pairs total: 61156 [2023-11-17 15:11:49,275 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-11-17 15:11:49,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:49,277 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;@218ea37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:49,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:11:49,279 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:49,279 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-17 15:11:49,279 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:11:49,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:49,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:49,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:49,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1004842676, now seen corresponding path program 1 times [2023-11-17 15:11:49,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:49,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105595851] [2023-11-17 15:11:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:49,317 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 15:11:49,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:49,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105595851] [2023-11-17 15:11:49,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105595851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:49,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:49,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:49,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128931003] [2023-11-17 15:11:49,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:49,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:49,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:49,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 323 [2023-11-17 15:11:49,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 15:11:49,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:49,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 323 [2023-11-17 15:11:49,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand