/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe034_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:50:56,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:50:56,814 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 11:50:56,818 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:50:56,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:50:56,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:50:56,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:50:56,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:50:56,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:50:56,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:50:56,850 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:50:56,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:50:56,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:50:56,852 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:50:56,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:50:56,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:50:56,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:50:56,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:50:56,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:50:56,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:50:56,853 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:50:56,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:50:56,854 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:50:56,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:50:56,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:50:56,855 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:50:56,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:50:56,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:50:56,855 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:50:56,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:50:56,857 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:50:56,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:50:56,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:50:56,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:50:56,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:50:56,858 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:50:57,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:50:57,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:50:57,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:50:57,168 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:50:57,168 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:50:57,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe034_tso.i [2023-08-24 11:50:58,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:50:58,586 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:50:58,587 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe034_tso.i [2023-08-24 11:50:58,605 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5edb6a56/5a50f250fafc42598d0bd5069132b647/FLAG276fa151d [2023-08-24 11:50:58,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5edb6a56/5a50f250fafc42598d0bd5069132b647 [2023-08-24 11:50:58,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:50:58,618 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:50:58,619 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:50:58,619 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:50:58,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:50:58,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:50:58" (1/1) ... [2023-08-24 11:50:58,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67737c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:58, skipping insertion in model container [2023-08-24 11:50:58,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:50:58" (1/1) ... [2023-08-24 11:50:58,660 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:50:58,803 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-wmm/safe034_tso.i[945,958] [2023-08-24 11:50:58,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:50:58,976 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:50:58,989 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-wmm/safe034_tso.i[945,958] [2023-08-24 11:50:59,006 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-24 11:50:59,008 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-24 11:50:59,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:50:59,067 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:50:59,068 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:50:59,074 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:50:59,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59 WrapperNode [2023-08-24 11:50:59,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:50:59,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:50:59,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:50:59,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:50:59,083 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,112 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,132 INFO L138 Inliner]: procedures = 176, calls = 57, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-08-24 11:50:59,133 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:50:59,134 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:50:59,134 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:50:59,134 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:50:59,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,162 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,164 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,167 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:50:59,168 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:50:59,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:50:59,168 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:50:59,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (1/1) ... [2023-08-24 11:50:59,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:50:59,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:50:59,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 11:50:59,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 11:50:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:50:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 11:50:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:50:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:50:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:50:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-24 11:50:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-24 11:50:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-24 11:50:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-24 11:50:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-24 11:50:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-24 11:50:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:50:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 11:50:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:50:59,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:50:59,241 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 11:50:59,381 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:50:59,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:50:59,500 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:50:59,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:50:59,505 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 11:50:59,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:50:59 BoogieIcfgContainer [2023-08-24 11:50:59,507 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:50:59,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:50:59,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:50:59,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:50:59,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:50:58" (1/3) ... [2023-08-24 11:50:59,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8312a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:50:59, skipping insertion in model container [2023-08-24 11:50:59,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:50:59" (2/3) ... [2023-08-24 11:50:59,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8312a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:50:59, skipping insertion in model container [2023-08-24 11:50:59,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:50:59" (3/3) ... [2023-08-24 11:50:59,514 INFO L112 eAbstractionObserver]: Analyzing ICFG safe034_tso.i [2023-08-24 11:50:59,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:50:59,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 11:50:59,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:50:59,583 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:50:59,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 85 transitions, 185 flow [2023-08-24 11:50:59,648 INFO L124 PetriNetUnfolderBase]: 2/82 cut-off events. [2023-08-24 11:50:59,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:50:59,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 82 events. 2/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-24 11:50:59,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 85 transitions, 185 flow [2023-08-24 11:50:59,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 70 transitions, 149 flow [2023-08-24 11:50:59,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:50:59,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-24 11:50:59,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-24 11:50:59,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 70 transitions, 149 flow [2023-08-24 11:50:59,712 INFO L124 PetriNetUnfolderBase]: 1/70 cut-off events. [2023-08-24 11:50:59,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:50:59,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-24 11:50:59,714 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-08-24 11:51:01,696 INFO L134 LiptonReduction]: Checked pairs total: 2177 [2023-08-24 11:51:01,696 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-24 11:51:01,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:51:01,725 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@79813a76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:51:01,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 11:51:01,735 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:51:01,735 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-24 11:51:01,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:51:01,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:01,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:01,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:01,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2054399275, now seen corresponding path program 1 times [2023-08-24 11:51:01,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:01,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265770043] [2023-08-24 11:51:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:01,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265770043] [2023-08-24 11:51:02,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265770043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:02,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:02,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 11:51:02,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879382893] [2023-08-24 11:51:02,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:51:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:51:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:51:02,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 141 [2023-08-24 11:51:02,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:02,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 141 [2023-08-24 11:51:02,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:02,273 INFO L124 PetriNetUnfolderBase]: 202/344 cut-off events. [2023-08-24 11:51:02,274 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-24 11:51:02,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 344 events. 202/344 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1354 event pairs, 78 based on Foata normal form. 6/349 useless extension candidates. Maximal degree in co-relation 693. Up to 296 conditions per place. [2023-08-24 11:51:02,278 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 22 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-24 11:51:02,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 119 flow [2023-08-24 11:51:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:51:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:51:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-24 11:51:02,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933806146572104 [2023-08-24 11:51:02,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-24 11:51:02,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-24 11:51:02,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:02,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-24 11:51:02,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,298 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) [2023-08-24 11:51:02,298 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) [2023-08-24 11:51:02,299 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 43 flow. Second operand 3 states and 251 transitions. [2023-08-24 11:51:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 119 flow [2023-08-24 11:51:02,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 11:51:02,303 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 59 flow [2023-08-24 11:51:02,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-08-24 11:51:02,307 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-24 11:51:02,307 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 59 flow [2023-08-24 11:51:02,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:02,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:51:02,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:02,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash -738132499, now seen corresponding path program 1 times [2023-08-24 11:51:02,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:02,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838713929] [2023-08-24 11:51:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:02,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838713929] [2023-08-24 11:51:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838713929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:02,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:51:02,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636173591] [2023-08-24 11:51:02,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:02,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:51:02,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:51:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:51:02,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-24 11:51:02,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:02,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-24 11:51:02,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:02,553 INFO L124 PetriNetUnfolderBase]: 173/315 cut-off events. [2023-08-24 11:51:02,553 INFO L125 PetriNetUnfolderBase]: For 73/77 co-relation queries the response was YES. [2023-08-24 11:51:02,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 315 events. 173/315 cut-off events. For 73/77 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1237 event pairs, 39 based on Foata normal form. 36/344 useless extension candidates. Maximal degree in co-relation 732. Up to 184 conditions per place. [2023-08-24 11:51:02,555 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 22 selfloop transitions, 4 changer transitions 15/45 dead transitions. [2023-08-24 11:51:02,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 45 transitions, 212 flow [2023-08-24 11:51:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 11:51:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 11:51:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2023-08-24 11:51:02,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2023-08-24 11:51:02,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2023-08-24 11:51:02,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2023-08-24 11:51:02,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:02,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2023-08-24 11:51:02,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,563 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 59 flow. Second operand 5 states and 399 transitions. [2023-08-24 11:51:02,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 45 transitions, 212 flow [2023-08-24 11:51:02,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:51:02,565 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 92 flow [2023-08-24 11:51:02,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-24 11:51:02,566 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-08-24 11:51:02,566 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 92 flow [2023-08-24 11:51:02,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:02,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:02,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 11:51:02,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:02,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1853572276, now seen corresponding path program 1 times [2023-08-24 11:51:02,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:02,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832236268] [2023-08-24 11:51:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:02,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:02,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832236268] [2023-08-24 11:51:02,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832236268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:02,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:02,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:51:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353296728] [2023-08-24 11:51:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:51:02,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:51:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:51:02,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-24 11:51:02,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 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) [2023-08-24 11:51:02,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:02,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-24 11:51:02,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:02,801 INFO L124 PetriNetUnfolderBase]: 101/201 cut-off events. [2023-08-24 11:51:02,802 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-24 11:51:02,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 201 events. 101/201 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 684 event pairs, 18 based on Foata normal form. 20/217 useless extension candidates. Maximal degree in co-relation 631. Up to 91 conditions per place. [2023-08-24 11:51:02,806 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 27 selfloop transitions, 7 changer transitions 14/52 dead transitions. [2023-08-24 11:51:02,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 52 transitions, 304 flow [2023-08-24 11:51:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 11:51:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 11:51:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 479 transitions. [2023-08-24 11:51:02,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.566193853427896 [2023-08-24 11:51:02,809 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 479 transitions. [2023-08-24 11:51:02,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 479 transitions. [2023-08-24 11:51:02,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:02,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 479 transitions. [2023-08-24 11:51:02,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.83333333333333) internal successors, (479), 6 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) [2023-08-24 11:51:02,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,815 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,815 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 92 flow. Second operand 6 states and 479 transitions. [2023-08-24 11:51:02,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 52 transitions, 304 flow [2023-08-24 11:51:02,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 52 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 11:51:02,819 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 142 flow [2023-08-24 11:51:02,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-24 11:51:02,820 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-08-24 11:51:02,823 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 142 flow [2023-08-24 11:51:02,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 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) [2023-08-24 11:51:02,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:02,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:02,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:51:02,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:02,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1422069978, now seen corresponding path program 1 times [2023-08-24 11:51:02,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:02,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629883084] [2023-08-24 11:51:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:02,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:02,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:02,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629883084] [2023-08-24 11:51:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629883084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:02,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:02,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:51:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273451691] [2023-08-24 11:51:02,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:02,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 11:51:02,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 11:51:02,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-24 11:51:02,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-24 11:51:02,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:02,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:02,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-24 11:51:02,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:03,059 INFO L124 PetriNetUnfolderBase]: 66/139 cut-off events. [2023-08-24 11:51:03,059 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-24 11:51:03,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 139 events. 66/139 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 411 event pairs, 15 based on Foata normal form. 8/144 useless extension candidates. Maximal degree in co-relation 485. Up to 57 conditions per place. [2023-08-24 11:51:03,060 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 24 selfloop transitions, 10 changer transitions 7/45 dead transitions. [2023-08-24 11:51:03,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 306 flow [2023-08-24 11:51:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:51:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:51:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 545 transitions. [2023-08-24 11:51:03,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521783181357649 [2023-08-24 11:51:03,063 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 545 transitions. [2023-08-24 11:51:03,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 545 transitions. [2023-08-24 11:51:03,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:03,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 545 transitions. [2023-08-24 11:51:03,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,067 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,067 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 142 flow. Second operand 7 states and 545 transitions. [2023-08-24 11:51:03,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 306 flow [2023-08-24 11:51:03,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 270 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 11:51:03,073 INFO L231 Difference]: Finished difference. Result has 40 places, 25 transitions, 144 flow [2023-08-24 11:51:03,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=144, PETRI_PLACES=40, PETRI_TRANSITIONS=25} [2023-08-24 11:51:03,074 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2023-08-24 11:51:03,075 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 25 transitions, 144 flow [2023-08-24 11:51:03,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:03,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 11:51:03,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:03,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash -825001738, now seen corresponding path program 1 times [2023-08-24 11:51:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:03,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797518462] [2023-08-24 11:51:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:03,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797518462] [2023-08-24 11:51:03,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797518462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:03,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:03,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:51:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189151048] [2023-08-24 11:51:03,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:03,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:51:03,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:03,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:51:03,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:51:03,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 141 [2023-08-24 11:51:03,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 25 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:03,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 141 [2023-08-24 11:51:03,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:03,274 INFO L124 PetriNetUnfolderBase]: 161/297 cut-off events. [2023-08-24 11:51:03,274 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2023-08-24 11:51:03,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 297 events. 161/297 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1082 event pairs, 28 based on Foata normal form. 1/298 useless extension candidates. Maximal degree in co-relation 953. Up to 227 conditions per place. [2023-08-24 11:51:03,277 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 35 selfloop transitions, 7 changer transitions 4/46 dead transitions. [2023-08-24 11:51:03,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 354 flow [2023-08-24 11:51:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:51:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:51:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-24 11:51:03,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791962174940898 [2023-08-24 11:51:03,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-24 11:51:03,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-24 11:51:03,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:03,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-24 11:51:03,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,280 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) [2023-08-24 11:51:03,281 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) [2023-08-24 11:51:03,281 INFO L175 Difference]: Start difference. First operand has 40 places, 25 transitions, 144 flow. Second operand 3 states and 245 transitions. [2023-08-24 11:51:03,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 354 flow [2023-08-24 11:51:03,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 284 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-24 11:51:03,286 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 160 flow [2023-08-24 11:51:03,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-24 11:51:03,288 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-08-24 11:51:03,288 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 160 flow [2023-08-24 11:51:03,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:03,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:03,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 11:51:03,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:03,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1794826614, now seen corresponding path program 2 times [2023-08-24 11:51:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:03,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489918899] [2023-08-24 11:51:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:03,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:03,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489918899] [2023-08-24 11:51:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489918899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:03,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:51:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356847580] [2023-08-24 11:51:03,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:51:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:51:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:51:03,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 141 [2023-08-24 11:51:03,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:03,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 141 [2023-08-24 11:51:03,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:03,519 INFO L124 PetriNetUnfolderBase]: 179/336 cut-off events. [2023-08-24 11:51:03,519 INFO L125 PetriNetUnfolderBase]: For 439/439 co-relation queries the response was YES. [2023-08-24 11:51:03,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 336 events. 179/336 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1277 event pairs, 15 based on Foata normal form. 1/337 useless extension candidates. Maximal degree in co-relation 1187. Up to 113 conditions per place. [2023-08-24 11:51:03,522 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 37 selfloop transitions, 14 changer transitions 10/61 dead transitions. [2023-08-24 11:51:03,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 61 transitions, 436 flow [2023-08-24 11:51:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 11:51:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 11:51:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-08-24 11:51:03,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475177304964539 [2023-08-24 11:51:03,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-08-24 11:51:03,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-08-24 11:51:03,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:03,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-08-24 11:51:03,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,527 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 160 flow. Second operand 5 states and 386 transitions. [2023-08-24 11:51:03,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 61 transitions, 436 flow [2023-08-24 11:51:03,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 61 transitions, 414 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:51:03,530 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 250 flow [2023-08-24 11:51:03,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-24 11:51:03,531 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2023-08-24 11:51:03,531 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 250 flow [2023-08-24 11:51:03,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:03,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:03,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 11:51:03,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:03,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1293956166, now seen corresponding path program 3 times [2023-08-24 11:51:03,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:03,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907559625] [2023-08-24 11:51:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:03,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:03,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:03,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907559625] [2023-08-24 11:51:03,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907559625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:03,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:03,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:51:03,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244334029] [2023-08-24 11:51:03,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:03,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:51:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:51:03,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:51:03,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 141 [2023-08-24 11:51:03,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:03,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 141 [2023-08-24 11:51:03,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:03,701 INFO L124 PetriNetUnfolderBase]: 199/386 cut-off events. [2023-08-24 11:51:03,701 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2023-08-24 11:51:03,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1551 conditions, 386 events. 199/386 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1580 event pairs, 36 based on Foata normal form. 1/387 useless extension candidates. Maximal degree in co-relation 1530. Up to 238 conditions per place. [2023-08-24 11:51:03,703 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 31 selfloop transitions, 8 changer transitions 18/57 dead transitions. [2023-08-24 11:51:03,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 458 flow [2023-08-24 11:51:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:51:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:51:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2023-08-24 11:51:03,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656028368794326 [2023-08-24 11:51:03,705 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 319 transitions. [2023-08-24 11:51:03,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 319 transitions. [2023-08-24 11:51:03,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:03,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 319 transitions. [2023-08-24 11:51:03,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,709 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,709 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 250 flow. Second operand 4 states and 319 transitions. [2023-08-24 11:51:03,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 458 flow [2023-08-24 11:51:03,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 458 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:51:03,716 INFO L231 Difference]: Finished difference. Result has 46 places, 31 transitions, 216 flow [2023-08-24 11:51:03,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=46, PETRI_TRANSITIONS=31} [2023-08-24 11:51:03,717 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2023-08-24 11:51:03,718 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 31 transitions, 216 flow [2023-08-24 11:51:03,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:51:03,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:51:03,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 11:51:03,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 11:51:03,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:51:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1959821978, now seen corresponding path program 4 times [2023-08-24 11:51:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:51:03,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815325123] [2023-08-24 11:51:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:51:03,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:51:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:51:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:51:03,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:51:03,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815325123] [2023-08-24 11:51:03,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815325123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:51:03,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:51:03,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:51:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312380672] [2023-08-24 11:51:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:51:03,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:51:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:51:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:51:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:51:03,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 141 [2023-08-24 11:51:03,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 31 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:51:03,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 141 [2023-08-24 11:51:03,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:51:03,899 INFO L124 PetriNetUnfolderBase]: 62/137 cut-off events. [2023-08-24 11:51:03,899 INFO L125 PetriNetUnfolderBase]: For 363/363 co-relation queries the response was YES. [2023-08-24 11:51:03,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 137 events. 62/137 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 422 event pairs, 4 based on Foata normal form. 1/138 useless extension candidates. Maximal degree in co-relation 589. Up to 73 conditions per place. [2023-08-24 11:51:03,900 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-24 11:51:03,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 461 flow [2023-08-24 11:51:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 11:51:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 11:51:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2023-08-24 11:51:03,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5418439716312057 [2023-08-24 11:51:03,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2023-08-24 11:51:03,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2023-08-24 11:51:03,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:51:03,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2023-08-24 11:51:03,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,904 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,905 INFO L175 Difference]: Start difference. First operand has 46 places, 31 transitions, 216 flow. Second operand 5 states and 382 transitions. [2023-08-24 11:51:03,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 461 flow [2023-08-24 11:51:03,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 428 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-24 11:51:03,907 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-24 11:51:03,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-24 11:51:03,908 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2023-08-24 11:51:03,908 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-24 11:51:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:51:03,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 11:51:03,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 11:51:03,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 11:51:03,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 11:51:03,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 11:51:03,912 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2023-08-24 11:51:03,914 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 11:51:03,914 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 11:51:03,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 11:51:03 BasicIcfg [2023-08-24 11:51:03,921 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 11:51:03,922 INFO L158 Benchmark]: Toolchain (without parser) took 5304.05ms. Allocated memory was 371.2MB in the beginning and 507.5MB in the end (delta: 136.3MB). Free memory was 328.1MB in the beginning and 316.7MB in the end (delta: 11.3MB). Peak memory consumption was 150.8MB. Max. memory is 16.0GB. [2023-08-24 11:51:03,922 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 371.2MB. Free memory was 348.9MB in the beginning and 348.9MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 11:51:03,922 INFO L158 Benchmark]: CACSL2BoogieTranslator took 457.55ms. Allocated memory is still 371.2MB. Free memory was 327.0MB in the beginning and 307.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 11:51:03,922 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.18ms. Allocated memory is still 371.2MB. Free memory was 307.1MB in the beginning and 305.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:51:03,922 INFO L158 Benchmark]: Boogie Preprocessor took 33.53ms. Allocated memory is still 371.2MB. Free memory was 305.0MB in the beginning and 303.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:51:03,923 INFO L158 Benchmark]: RCFGBuilder took 339.44ms. Allocated memory is still 371.2MB. Free memory was 303.9MB in the beginning and 287.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 11:51:03,923 INFO L158 Benchmark]: TraceAbstraction took 4412.15ms. Allocated memory was 371.2MB in the beginning and 507.5MB in the end (delta: 136.3MB). Free memory was 287.2MB in the beginning and 316.7MB in the end (delta: -29.6MB). Peak memory consumption was 108.8MB. Max. memory is 16.0GB. [2023-08-24 11:51:03,924 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 371.2MB. Free memory was 348.9MB in the beginning and 348.9MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 457.55ms. Allocated memory is still 371.2MB. Free memory was 327.0MB in the beginning and 307.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.18ms. Allocated memory is still 371.2MB. Free memory was 307.1MB in the beginning and 305.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.53ms. Allocated memory is still 371.2MB. Free memory was 305.0MB in the beginning and 303.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 339.44ms. Allocated memory is still 371.2MB. Free memory was 303.9MB in the beginning and 287.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 4412.15ms. Allocated memory was 371.2MB in the beginning and 507.5MB in the end (delta: 136.3MB). Free memory was 287.2MB in the beginning and 316.7MB in the end (delta: -29.6MB). Peak memory consumption was 108.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 79 PlacesBefore, 27 PlacesAfterwards, 70 TransitionsBefore, 17 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 56 TotalNumberOfCompositions, 2177 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1284, independent: 1187, independent conditional: 0, independent unconditional: 1187, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 572, independent: 549, independent conditional: 0, independent unconditional: 549, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1284, independent: 638, independent conditional: 0, independent unconditional: 638, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 572, unknown conditional: 0, unknown unconditional: 572] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 108 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 123 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 123 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 389 IncrementalHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 19 mSDtfsCounter, 389 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=250occurred in iteration=6, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 386 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 11:51:03,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...