/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/weaver/popl20-bad-counter-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:48:03,986 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:48:04,049 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 14:48:04,052 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:48:04,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:48:04,075 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:48:04,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:48:04,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:48:04,079 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:48:04,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:48:04,082 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:48:04,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:48:04,082 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:48:04,083 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:48:04,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:48:04,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:48:04,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:48:04,084 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:48:04,084 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:48:04,084 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:48:04,084 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:48:04,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:48:04,085 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:48:04,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:48:04,085 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:48:04,085 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:48:04,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:48:04,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:48:04,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:48:04,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:48:04,087 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:48:04,087 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:48:04,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:48:04,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:48:04,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:48:04,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:48:04,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:48:04,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:48:04,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:48:04,342 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:48:04,342 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:48:04,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-24 14:48:05,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:48:05,468 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:48:05,468 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c [2023-08-24 14:48:05,475 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16417877b/f90e3cbf830b451795cdb051f5a66cb7/FLAG8c2bab954 [2023-08-24 14:48:05,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16417877b/f90e3cbf830b451795cdb051f5a66cb7 [2023-08-24 14:48:05,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:48:05,492 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:48:05,494 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:48:05,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:48:05,496 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:48:05,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a40436a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05, skipping insertion in model container [2023-08-24 14:48:05,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,515 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:48:05,642 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-24 14:48:05,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:48:05,653 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:48:05,674 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2023-08-24 14:48:05,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:48:05,684 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:48:05,684 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:48:05,688 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:48:05,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05 WrapperNode [2023-08-24 14:48:05,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:48:05,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:48:05,689 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:48:05,689 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:48:05,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,713 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2023-08-24 14:48:05,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:48:05,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:48:05,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:48:05,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:48:05,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,731 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,735 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,736 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:48:05,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:48:05,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:48:05,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:48:05,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (1/1) ... [2023-08-24 14:48:05,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:48:05,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:48:05,767 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 14:48:05,772 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 14:48:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:48:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:48:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:48:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:48:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:48:05,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:48:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:48:05,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:48:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:48:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:48:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:48:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 14:48:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:48:05,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:48:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:48:05,799 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 14:48:05,884 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:48:05,885 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:48:06,052 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:48:06,120 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:48:06,121 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 14:48:06,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:48:06 BoogieIcfgContainer [2023-08-24 14:48:06,122 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:48:06,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:48:06,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:48:06,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:48:06,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:48:05" (1/3) ... [2023-08-24 14:48:06,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d528e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:48:06, skipping insertion in model container [2023-08-24 14:48:06,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:48:05" (2/3) ... [2023-08-24 14:48:06,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d528e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:48:06, skipping insertion in model container [2023-08-24 14:48:06,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:48:06" (3/3) ... [2023-08-24 14:48:06,128 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-08-24 14:48:06,138 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:48:06,138 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:48:06,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:48:06,173 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 14:48:06,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 114 transitions, 244 flow [2023-08-24 14:48:06,273 INFO L124 PetriNetUnfolderBase]: 9/112 cut-off events. [2023-08-24 14:48:06,273 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:48:06,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 112 events. 9/112 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2023-08-24 14:48:06,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 114 transitions, 244 flow [2023-08-24 14:48:06,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 104 transitions, 220 flow [2023-08-24 14:48:06,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:48:06,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 104 transitions, 220 flow [2023-08-24 14:48:06,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 104 transitions, 220 flow [2023-08-24 14:48:06,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 220 flow [2023-08-24 14:48:06,325 INFO L124 PetriNetUnfolderBase]: 9/104 cut-off events. [2023-08-24 14:48:06,326 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:48:06,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 104 events. 9/104 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 2 conditions per place. [2023-08-24 14:48:06,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-08-24 14:48:09,116 INFO L134 LiptonReduction]: Checked pairs total: 852 [2023-08-24 14:48:09,116 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-24 14:48:09,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:48:09,128 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;@2fb60a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:48:09,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 14:48:09,131 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:48:09,132 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-08-24 14:48:09,132 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:48:09,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:09,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:09,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:48:09,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1843013350, now seen corresponding path program 1 times [2023-08-24 14:48:09,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:09,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288796184] [2023-08-24 14:48:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:09,395 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 14:48:09,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:09,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288796184] [2023-08-24 14:48:09,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288796184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:09,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:09,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 14:48:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700266855] [2023-08-24 14:48:09,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:09,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:48:09,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:48:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:48:09,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 211 [2023-08-24 14:48:09,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 14:48:09,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:09,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 211 [2023-08-24 14:48:09,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:09,495 INFO L124 PetriNetUnfolderBase]: 114/197 cut-off events. [2023-08-24 14:48:09,495 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-24 14:48:09,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 197 events. 114/197 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 712 event pairs, 24 based on Foata normal form. 1/144 useless extension candidates. Maximal degree in co-relation 328. Up to 136 conditions per place. [2023-08-24 14:48:09,498 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 25 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-08-24 14:48:09,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 141 flow [2023-08-24 14:48:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:48:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:48:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-24 14:48:09,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071090047393365 [2023-08-24 14:48:09,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-24 14:48:09,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-24 14:48:09,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:09,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-24 14:48:09,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 14:48:09,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 14:48:09,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 14:48:09,527 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 321 transitions. [2023-08-24 14:48:09,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 141 flow [2023-08-24 14:48:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 14:48:09,530 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 61 flow [2023-08-24 14:48:09,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-08-24 14:48:09,534 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-24 14:48:09,534 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 61 flow [2023-08-24 14:48:09,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 14:48:09,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:09,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:09,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:48:09,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:48:09,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:09,541 INFO L85 PathProgramCache]: Analyzing trace with hash -309457799, now seen corresponding path program 1 times [2023-08-24 14:48:09,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:09,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121952131] [2023-08-24 14:48:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:09,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:48:09,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:09,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121952131] [2023-08-24 14:48:09,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121952131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:09,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:09,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:48:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352844318] [2023-08-24 14:48:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:09,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:48:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:48:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:48:09,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 211 [2023-08-24 14:48:09,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 14:48:09,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:09,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 211 [2023-08-24 14:48:09,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:09,793 INFO L124 PetriNetUnfolderBase]: 178/330 cut-off events. [2023-08-24 14:48:09,794 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-24 14:48:09,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 330 events. 178/330 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1379 event pairs, 93 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 277. Up to 207 conditions per place. [2023-08-24 14:48:09,798 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 38 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-08-24 14:48:09,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 44 transitions, 210 flow [2023-08-24 14:48:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 430 transitions. [2023-08-24 14:48:09,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075829383886256 [2023-08-24 14:48:09,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 430 transitions. [2023-08-24 14:48:09,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 430 transitions. [2023-08-24 14:48:09,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:09,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 430 transitions. [2023-08-24 14:48:09,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 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 14:48:09,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:09,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:09,805 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 61 flow. Second operand 5 states and 430 transitions. [2023-08-24 14:48:09,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 44 transitions, 210 flow [2023-08-24 14:48:09,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 44 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:48:09,807 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 94 flow [2023-08-24 14:48:09,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-08-24 14:48:09,808 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-08-24 14:48:09,808 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 94 flow [2023-08-24 14:48:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 14:48:09,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:09,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:48:09,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:48:09,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:09,817 INFO L85 PathProgramCache]: Analyzing trace with hash -29517485, now seen corresponding path program 1 times [2023-08-24 14:48:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:09,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832743605] [2023-08-24 14:48:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:09,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:48:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:09,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832743605] [2023-08-24 14:48:09,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832743605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:09,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:09,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:48:09,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958312249] [2023-08-24 14:48:09,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:09,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:48:09,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:09,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:48:09,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:48:09,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 211 [2023-08-24 14:48:09,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 14:48:09,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:09,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 211 [2023-08-24 14:48:09,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:09,959 INFO L124 PetriNetUnfolderBase]: 132/246 cut-off events. [2023-08-24 14:48:09,959 INFO L125 PetriNetUnfolderBase]: For 73/80 co-relation queries the response was YES. [2023-08-24 14:48:09,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 246 events. 132/246 cut-off events. For 73/80 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 923 event pairs, 87 based on Foata normal form. 7/208 useless extension candidates. Maximal degree in co-relation 508. Up to 205 conditions per place. [2023-08-24 14:48:09,961 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 19 selfloop transitions, 2 changer transitions 16/38 dead transitions. [2023-08-24 14:48:09,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 201 flow [2023-08-24 14:48:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2023-08-24 14:48:09,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028436018957346 [2023-08-24 14:48:09,962 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 425 transitions. [2023-08-24 14:48:09,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 425 transitions. [2023-08-24 14:48:09,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:09,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 425 transitions. [2023-08-24 14:48:09,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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 14:48:09,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:09,965 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:09,965 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 94 flow. Second operand 5 states and 425 transitions. [2023-08-24 14:48:09,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 201 flow [2023-08-24 14:48:09,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 14:48:09,966 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 82 flow [2023-08-24 14:48:09,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-24 14:48:09,967 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-08-24 14:48:09,967 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 82 flow [2023-08-24 14:48:09,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 14:48:09,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:09,968 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 14:48:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:48:09,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:48:09,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash 316446782, now seen corresponding path program 1 times [2023-08-24 14:48:09,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:09,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125500810] [2023-08-24 14:48:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:10,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125500810] [2023-08-24 14:48:10,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125500810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:10,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081934980] [2023-08-24 14:48:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:10,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:48:10,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:48:10,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 14:48:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:10,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:48:10,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:48:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:10,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:48:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:10,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081934980] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:10,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:48:10,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 14:48:10,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934914521] [2023-08-24 14:48:10,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:10,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:48:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:48:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:48:10,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 211 [2023-08-24 14:48:10,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:48:10,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:10,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 211 [2023-08-24 14:48:10,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:10,273 INFO L124 PetriNetUnfolderBase]: 117/205 cut-off events. [2023-08-24 14:48:10,273 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-24 14:48:10,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 205 events. 117/205 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 667 event pairs, 35 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 558. Up to 112 conditions per place. [2023-08-24 14:48:10,274 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 23 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-08-24 14:48:10,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 167 flow [2023-08-24 14:48:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2023-08-24 14:48:10,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395260663507109 [2023-08-24 14:48:10,275 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 417 transitions. [2023-08-24 14:48:10,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 417 transitions. [2023-08-24 14:48:10,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:10,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 417 transitions. [2023-08-24 14:48:10,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 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 14:48:10,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:10,278 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:10,278 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 82 flow. Second operand 5 states and 417 transitions. [2023-08-24 14:48:10,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 167 flow [2023-08-24 14:48:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 143 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-24 14:48:10,279 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 91 flow [2023-08-24 14:48:10,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-24 14:48:10,280 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-08-24 14:48:10,280 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 91 flow [2023-08-24 14:48:10,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:48:10,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:10,280 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 14:48:10,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 14:48:10,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:10,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:48:10,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash 336599392, now seen corresponding path program 1 times [2023-08-24 14:48:10,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:10,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271092381] [2023-08-24 14:48:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:10,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:10,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271092381] [2023-08-24 14:48:10,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271092381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:10,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488426219] [2023-08-24 14:48:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:10,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:48:10,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:48:10,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 14:48:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:10,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:48:10,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:48:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:10,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:48:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:48:10,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488426219] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:48:10,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:48:10,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 14:48:10,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325528940] [2023-08-24 14:48:10,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:10,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:48:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:48:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:48:10,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 211 [2023-08-24 14:48:10,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:48:10,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:10,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 211 [2023-08-24 14:48:10,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:48:10,732 INFO L124 PetriNetUnfolderBase]: 94/169 cut-off events. [2023-08-24 14:48:10,732 INFO L125 PetriNetUnfolderBase]: For 82/100 co-relation queries the response was YES. [2023-08-24 14:48:10,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 169 events. 94/169 cut-off events. For 82/100 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 478 event pairs, 32 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 459. Up to 93 conditions per place. [2023-08-24 14:48:10,733 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-08-24 14:48:10,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 192 flow [2023-08-24 14:48:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:48:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:48:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2023-08-24 14:48:10,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395260663507109 [2023-08-24 14:48:10,735 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 417 transitions. [2023-08-24 14:48:10,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 417 transitions. [2023-08-24 14:48:10,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:48:10,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 417 transitions. [2023-08-24 14:48:10,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 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 14:48:10,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:10,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 14:48:10,738 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 91 flow. Second operand 5 states and 417 transitions. [2023-08-24 14:48:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 192 flow [2023-08-24 14:48:10,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 14:48:10,740 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 111 flow [2023-08-24 14:48:10,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-24 14:48:10,742 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2023-08-24 14:48:10,743 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 111 flow [2023-08-24 14:48:10,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:48:10,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:10,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:10,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 14:48:10,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:10,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:48:10,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1302416607, now seen corresponding path program 1 times [2023-08-24 14:48:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:10,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518688101] [2023-08-24 14:48:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:10,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 14:48:10,972 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 14:48:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 14:48:11,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 14:48:11,004 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 14:48:11,005 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 14:48:11,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 14:48:11,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 14:48:11,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 14:48:11,006 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-24 14:48:11,009 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 14:48:11,009 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 14:48:11,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:48:11 BasicIcfg [2023-08-24 14:48:11,034 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 14:48:11,035 INFO L158 Benchmark]: Toolchain (without parser) took 5542.71ms. Allocated memory was 356.5MB in the beginning and 455.1MB in the end (delta: 98.6MB). Free memory was 332.6MB in the beginning and 275.3MB in the end (delta: 57.3MB). Peak memory consumption was 157.3MB. Max. memory is 16.0GB. [2023-08-24 14:48:11,035 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory was 333.0MB in the beginning and 332.9MB in the end (delta: 83.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:48:11,035 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.63ms. Allocated memory is still 356.5MB. Free memory was 332.2MB in the beginning and 320.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 14:48:11,035 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.47ms. Allocated memory is still 356.5MB. Free memory was 320.6MB in the beginning and 318.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 14:48:11,035 INFO L158 Benchmark]: Boogie Preprocessor took 22.32ms. Allocated memory is still 356.5MB. Free memory was 318.6MB in the beginning and 316.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 14:48:11,036 INFO L158 Benchmark]: RCFGBuilder took 373.57ms. Allocated memory is still 356.5MB. Free memory was 316.9MB in the beginning and 291.0MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-24 14:48:11,036 INFO L158 Benchmark]: TraceAbstraction took 4910.47ms. Allocated memory was 356.5MB in the beginning and 455.1MB in the end (delta: 98.6MB). Free memory was 290.3MB in the beginning and 275.3MB in the end (delta: 15.0MB). Peak memory consumption was 115.4MB. Max. memory is 16.0GB. [2023-08-24 14:48:11,037 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory was 333.0MB in the beginning and 332.9MB in the end (delta: 83.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 194.63ms. Allocated memory is still 356.5MB. Free memory was 332.2MB in the beginning and 320.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.47ms. Allocated memory is still 356.5MB. Free memory was 320.6MB in the beginning and 318.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.32ms. Allocated memory is still 356.5MB. Free memory was 318.6MB in the beginning and 316.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 373.57ms. Allocated memory is still 356.5MB. Free memory was 316.9MB in the beginning and 291.0MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 4910.47ms. Allocated memory was 356.5MB in the beginning and 455.1MB in the end (delta: 98.6MB). Free memory was 290.3MB in the beginning and 275.3MB in the end (delta: 15.0MB). Peak memory consumption was 115.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 102 PlacesBefore, 23 PlacesAfterwards, 104 TransitionsBefore, 19 TransitionsAfterwards, 648 CoEnabledTransitionPairs, 6 FixpointIterations, 56 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 97 TotalNumberOfCompositions, 852 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 724, independent: 692, independent conditional: 0, independent unconditional: 692, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 350, independent: 341, independent conditional: 0, independent unconditional: 341, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 724, independent: 351, independent conditional: 0, independent unconditional: 351, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 350, unknown conditional: 0, unknown unconditional: 350] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 31, Positive conditional cache size: 0, Positive unconditional cache size: 31, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-1:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-1:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-1:0}, N=1, counter=0, pthread_create(&t1, 0, thread1, 0)=7, t1={5:0}, t2={3:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-1:0}, N=1, counter=0, pthread_create(&t2, 0, thread2, 0)=8, t1={5:0}, t2={3:0}] [L62] 2 int i=0; VAL [A={-1:0}, N=1, counter=0, i=0] [L49] 1 int i=0; VAL [A={-1:0}, N=1, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L54] 1 counter = tmp [L49] 1 i++ VAL [A={-1:0}, N=1, counter=6, i=1, tmp=6] [L83] 0 \read(t1) VAL [A={-1:0}, N=1, \read(t1)=7, counter=6, t1={5:0}, t2={3:0}] [L49] COND FALSE 1 !(i