/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:43:14,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:43:14,475 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 [2023-08-23 22:43:14,480 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:43:14,480 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:43:14,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:43:14,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:43:14,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:43:14,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:43:14,515 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:43:14,515 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:43:14,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:43:14,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:43:14,517 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:43:14,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:43:14,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:43:14,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:43:14,518 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:43:14,518 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:43:14,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:43:14,519 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:43:14,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:43:14,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:43:14,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:43:14,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:43:14,521 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:43:14,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:43:14,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:43:14,522 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:43:14,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:43:14,523 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:43:14,523 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:43:14,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:43:14,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:43:14,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:43:14,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:43:14,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:43:14,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:43:14,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:43:14,831 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:43:14,831 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:43:14,832 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-23 22:43:15,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:43:16,149 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:43:16,150 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-23 22:43:16,171 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f069cec/3d4fbf8e45664f6ebaf2079f3cfde360/FLAG6f06bffd8 [2023-08-23 22:43:16,186 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f069cec/3d4fbf8e45664f6ebaf2079f3cfde360 [2023-08-23 22:43:16,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:43:16,189 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:43:16,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:43:16,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:43:16,195 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:43:16,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fc3f50b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16, skipping insertion in model container [2023-08-23 22:43:16,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,246 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:43:16,428 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:43:16,562 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-23 22:43:16,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:43:16,577 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:43:16,596 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:43:16,606 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-23 22:43:16,607 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-23 22:43:16,620 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [704] [2023-08-23 22:43:16,622 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [716] [2023-08-23 22:43:16,624 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-23 22:43:16,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:43:16,658 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:43:16,659 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:43:16,659 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:43:16,665 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:43:16,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16 WrapperNode [2023-08-23 22:43:16,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:43:16,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:43:16,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:43:16,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:43:16,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,694 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,716 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2023-08-23 22:43:16,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:43:16,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:43:16,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:43:16,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:43:16,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,737 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:43:16,747 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:43:16,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:43:16,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:43:16,748 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (1/1) ... [2023-08-23 22:43:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:43:16,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:43:16,794 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) [2023-08-23 22:43:16,814 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 [2023-08-23 22:43:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:43:16,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:43:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:43:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:43:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:43:16,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:43:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:43:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:43:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:43:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:43:16,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:43:16,830 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:43:16,929 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:43:16,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:43:17,064 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:43:17,130 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:43:17,130 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-23 22:43:17,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:43:17 BoogieIcfgContainer [2023-08-23 22:43:17,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:43:17,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:43:17,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:43:17,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:43:17,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:43:16" (1/3) ... [2023-08-23 22:43:17,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343cf908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:43:17, skipping insertion in model container [2023-08-23 22:43:17,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:43:16" (2/3) ... [2023-08-23 22:43:17,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343cf908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:43:17, skipping insertion in model container [2023-08-23 22:43:17,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:43:17" (3/3) ... [2023-08-23 22:43:17,143 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-08-23 22:43:17,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:43:17,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:43:17,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:43:17,217 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:17,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-23 22:43:17,294 INFO L124 PetriNetUnfolderBase]: 3/50 cut-off events. [2023-08-23 22:43:17,294 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:17,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-23 22:43:17,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2023-08-23 22:43:17,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2023-08-23 22:43:17,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:17,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-23 22:43:17,321 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-23 22:43:17,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-23 22:43:17,360 INFO L124 PetriNetUnfolderBase]: 3/50 cut-off events. [2023-08-23 22:43:17,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:17,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-23 22:43:17,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 364 [2023-08-23 22:43:19,241 INFO L134 LiptonReduction]: Checked pairs total: 330 [2023-08-23 22:43:19,242 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-23 22:43:19,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:19,256 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;@60ec39e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:19,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 22:43:19,258 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:19,258 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-23 22:43:19,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:19,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:19,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 22:43:19,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 22:43:19,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash 7473566, now seen corresponding path program 1 times [2023-08-23 22:43:19,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:19,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072694669] [2023-08-23 22:43:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:19,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:19,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072694669] [2023-08-23 22:43:19,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072694669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:19,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:19,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:43:19,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233894131] [2023-08-23 22:43:19,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:19,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-23 22:43:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-23 22:43:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-23 22:43:19,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 78 [2023-08-23 22:43:19,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:19,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:19,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 78 [2023-08-23 22:43:19,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:19,434 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-23 22:43:19,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:19,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-23 22:43:19,435 INFO L140 encePairwiseOnDemand]: 76/78 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-23 22:43:19,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-23 22:43:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-23 22:43:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-23 22:43:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2023-08-23 22:43:19,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2023-08-23 22:43:19,444 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 71 transitions. [2023-08-23 22:43:19,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 71 transitions. [2023-08-23 22:43:19,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:19,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 71 transitions. [2023-08-23 22:43:19,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 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) [2023-08-23 22:43:19,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2023-08-23 22:43:19,452 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2023-08-23 22:43:19,453 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 71 transitions. [2023-08-23 22:43:19,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-23 22:43:19,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:19,456 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-23 22:43:19,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-23 22:43:19,460 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-23 22:43:19,460 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-23 22:43:19,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:19,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:19,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 22:43:19,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:43:19,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 22:43:19,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1407855100, now seen corresponding path program 1 times [2023-08-23 22:43:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:19,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456424810] [2023-08-23 22:43:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:19,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:19,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:43:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:19,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:43:19,505 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:43:19,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-23 22:43:19,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-23 22:43:19,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-23 22:43:19,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:43:19,508 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:43:19,510 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:43:19,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:43:19,523 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:19,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-23 22:43:19,537 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-08-23 22:43:19,537 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:43:19,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-23 22:43:19,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2023-08-23 22:43:19,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-08-23 22:43:19,539 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:19,539 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-23 22:43:19,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-23 22:43:19,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-23 22:43:19,550 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-08-23 22:43:19,550 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:43:19,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-23 22:43:19,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2023-08-23 22:43:20,574 INFO L134 LiptonReduction]: Checked pairs total: 3716 [2023-08-23 22:43:20,574 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-23 22:43:20,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:20,577 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;@60ec39e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:20,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 22:43:20,580 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:20,580 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-08-23 22:43:20,581 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:43:20,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:20,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:20,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 22:43:20,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash 626667327, now seen corresponding path program 1 times [2023-08-23 22:43:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601191151] [2023-08-23 22:43:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:20,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:20,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601191151] [2023-08-23 22:43:20,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601191151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:20,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:20,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:20,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584410312] [2023-08-23 22:43:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:20,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:20,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 87 [2023-08-23 22:43:20,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2023-08-23 22:43:20,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:20,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 87 [2023-08-23 22:43:20,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:21,026 INFO L124 PetriNetUnfolderBase]: 256/475 cut-off events. [2023-08-23 22:43:21,027 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-23 22:43:21,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 475 events. 256/475 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2514 event pairs, 53 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 884. Up to 148 conditions per place. [2023-08-23 22:43:21,035 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 43 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2023-08-23 22:43:21,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 236 flow [2023-08-23 22:43:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 247 transitions. [2023-08-23 22:43:21,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731800766283525 [2023-08-23 22:43:21,042 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 247 transitions. [2023-08-23 22:43:21,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 247 transitions. [2023-08-23 22:43:21,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:21,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 247 transitions. [2023-08-23 22:43:21,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 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) [2023-08-23 22:43:21,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2023-08-23 22:43:21,049 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2023-08-23 22:43:21,049 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 6 states and 247 transitions. [2023-08-23 22:43:21,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 236 flow [2023-08-23 22:43:21,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 234 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:21,052 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 116 flow [2023-08-23 22:43:21,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-23 22:43:21,053 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-23 22:43:21,053 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 116 flow [2023-08-23 22:43:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2023-08-23 22:43:21,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:21,057 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 22:43:21,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:43:21,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-23 22:43:21,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1647591444, now seen corresponding path program 1 times [2023-08-23 22:43:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:21,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249307236] [2023-08-23 22:43:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:21,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:43:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:21,108 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:43:21,109 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:43:21,109 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-23 22:43:21,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 22:43:21,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-23 22:43:21,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 22:43:21,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:43:21,110 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:43:21,110 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:43:21,111 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 22:43:21,135 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:21,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-23 22:43:21,148 INFO L124 PetriNetUnfolderBase]: 7/104 cut-off events. [2023-08-23 22:43:21,148 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:43:21,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-23 22:43:21,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-23 22:43:21,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-23 22:43:21,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:21,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-23 22:43:21,150 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-23 22:43:21,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-23 22:43:21,161 INFO L124 PetriNetUnfolderBase]: 7/104 cut-off events. [2023-08-23 22:43:21,161 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:43:21,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-23 22:43:21,164 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2023-08-23 22:43:22,365 INFO L134 LiptonReduction]: Checked pairs total: 10314 [2023-08-23 22:43:22,365 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-23 22:43:22,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:22,368 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;@60ec39e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:22,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 22:43:22,370 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:22,371 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-08-23 22:43:22,371 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:43:22,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:22,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:22,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:43:22,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1282466881, now seen corresponding path program 1 times [2023-08-23 22:43:22,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:22,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162344555] [2023-08-23 22:43:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:22,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:22,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:22,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162344555] [2023-08-23 22:43:22,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162344555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:22,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:22,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:22,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366399522] [2023-08-23 22:43:22,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:22,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:22,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:22,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2023-08-23 22:43:22,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 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) [2023-08-23 22:43:22,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:22,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2023-08-23 22:43:22,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:23,222 INFO L124 PetriNetUnfolderBase]: 5256/7668 cut-off events. [2023-08-23 22:43:23,222 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2023-08-23 22:43:23,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15756 conditions, 7668 events. 5256/7668 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 47302 event pairs, 1315 based on Foata normal form. 0/6308 useless extension candidates. Maximal degree in co-relation 8306. Up to 3200 conditions per place. [2023-08-23 22:43:23,270 INFO L140 encePairwiseOnDemand]: 97/108 looper letters, 92 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2023-08-23 22:43:23,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 107 transitions, 481 flow [2023-08-23 22:43:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2023-08-23 22:43:23,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108024691358025 [2023-08-23 22:43:23,273 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 331 transitions. [2023-08-23 22:43:23,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 331 transitions. [2023-08-23 22:43:23,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:23,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 331 transitions. [2023-08-23 22:43:23,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.166666666666664) internal successors, (331), 6 states have internal predecessors, (331), 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) [2023-08-23 22:43:23,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 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) [2023-08-23 22:43:23,276 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 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) [2023-08-23 22:43:23,276 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 6 states and 331 transitions. [2023-08-23 22:43:23,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 107 transitions, 481 flow [2023-08-23 22:43:23,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 107 transitions, 467 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:23,279 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 176 flow [2023-08-23 22:43:23,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-23 22:43:23,280 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-23 22:43:23,281 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 176 flow [2023-08-23 22:43:23,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 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) [2023-08-23 22:43:23,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:23,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:23,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:43:23,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:43:23,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1558574825, now seen corresponding path program 1 times [2023-08-23 22:43:23,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:23,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011078609] [2023-08-23 22:43:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:23,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:43:23,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011078609] [2023-08-23 22:43:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011078609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:23,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:23,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527866874] [2023-08-23 22:43:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:23,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2023-08-23 22:43:23,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:23,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:23,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2023-08-23 22:43:23,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:24,247 INFO L124 PetriNetUnfolderBase]: 7361/10903 cut-off events. [2023-08-23 22:43:24,247 INFO L125 PetriNetUnfolderBase]: For 3753/3753 co-relation queries the response was YES. [2023-08-23 22:43:24,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 10903 events. 7361/10903 cut-off events. For 3753/3753 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 73636 event pairs, 2187 based on Foata normal form. 0/9933 useless extension candidates. Maximal degree in co-relation 18620. Up to 4998 conditions per place. [2023-08-23 22:43:24,419 INFO L140 encePairwiseOnDemand]: 101/108 looper letters, 97 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2023-08-23 22:43:24,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 119 transitions, 650 flow [2023-08-23 22:43:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 320 transitions. [2023-08-23 22:43:24,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2023-08-23 22:43:24,421 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 320 transitions. [2023-08-23 22:43:24,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 320 transitions. [2023-08-23 22:43:24,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:24,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 320 transitions. [2023-08-23 22:43:24,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.333333333333336) internal successors, (320), 6 states have internal predecessors, (320), 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) [2023-08-23 22:43:24,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 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) [2023-08-23 22:43:24,424 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 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) [2023-08-23 22:43:24,424 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 176 flow. Second operand 6 states and 320 transitions. [2023-08-23 22:43:24,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 119 transitions, 650 flow [2023-08-23 22:43:24,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 119 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:24,446 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 306 flow [2023-08-23 22:43:24,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-23 22:43:24,447 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-08-23 22:43:24,448 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 306 flow [2023-08-23 22:43:24,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:24,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:24,448 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 22:43:24,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:43:24,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:43:24,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash -547612026, now seen corresponding path program 1 times [2023-08-23 22:43:24,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:24,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778110690] [2023-08-23 22:43:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:24,469 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:43:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:43:24,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:43:24,490 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:43:24,490 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-23 22:43:24,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-23 22:43:24,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-23 22:43:24,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-23 22:43:24,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-23 22:43:24,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:43:24,491 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 22:43:24,492 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:43:24,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 22:43:24,525 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:43:24,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-23 22:43:24,539 INFO L124 PetriNetUnfolderBase]: 9/131 cut-off events. [2023-08-23 22:43:24,539 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:43:24,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-23 22:43:24,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2023-08-23 22:43:24,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2023-08-23 22:43:24,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:43:24,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-23 22:43:24,542 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-23 22:43:24,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-23 22:43:24,555 INFO L124 PetriNetUnfolderBase]: 9/131 cut-off events. [2023-08-23 22:43:24,555 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:43:24,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-23 22:43:24,558 INFO L119 LiptonReduction]: Number of co-enabled transitions 3976 [2023-08-23 22:43:25,968 INFO L134 LiptonReduction]: Checked pairs total: 15362 [2023-08-23 22:43:25,968 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-23 22:43:25,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:25,970 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;@60ec39e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:25,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:43:25,972 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:25,972 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-08-23 22:43:25,972 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:43:25,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:25,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:25,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:43:25,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:25,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1057443007, now seen corresponding path program 1 times [2023-08-23 22:43:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:25,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810671152] [2023-08-23 22:43:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:25,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:26,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:26,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810671152] [2023-08-23 22:43:26,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810671152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:26,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:26,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:26,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119935400] [2023-08-23 22:43:26,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:26,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:26,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:26,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-23 22:43:26,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2023-08-23 22:43:26,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:26,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-23 22:43:26,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:32,099 INFO L124 PetriNetUnfolderBase]: 77874/102128 cut-off events. [2023-08-23 22:43:32,099 INFO L125 PetriNetUnfolderBase]: For 11600/11600 co-relation queries the response was YES. [2023-08-23 22:43:32,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210140 conditions, 102128 events. 77874/102128 cut-off events. For 11600/11600 co-relation queries the response was YES. Maximal size of possible extension queue 5190. Compared 660259 event pairs, 21367 based on Foata normal form. 0/82714 useless extension candidates. Maximal degree in co-relation 44210. Up to 46474 conditions per place. [2023-08-23 22:43:32,826 INFO L140 encePairwiseOnDemand]: 116/129 looper letters, 129 selfloop transitions, 15 changer transitions 0/147 dead transitions. [2023-08-23 22:43:32,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 147 transitions, 688 flow [2023-08-23 22:43:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 403 transitions. [2023-08-23 22:43:32,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520671834625323 [2023-08-23 22:43:32,829 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 403 transitions. [2023-08-23 22:43:32,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 403 transitions. [2023-08-23 22:43:32,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:32,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 403 transitions. [2023-08-23 22:43:32,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 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) [2023-08-23 22:43:32,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2023-08-23 22:43:32,833 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2023-08-23 22:43:32,833 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 124 flow. Second operand 6 states and 403 transitions. [2023-08-23 22:43:32,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 147 transitions, 688 flow [2023-08-23 22:43:32,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 147 transitions, 652 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:32,841 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 228 flow [2023-08-23 22:43:32,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-23 22:43:32,843 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-23 22:43:32,843 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 228 flow [2023-08-23 22:43:32,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2023-08-23 22:43:32,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:32,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 22:43:32,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:43:32,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1487924442, now seen corresponding path program 1 times [2023-08-23 22:43:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673966816] [2023-08-23 22:43:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:43:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673966816] [2023-08-23 22:43:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673966816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:32,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:32,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92802303] [2023-08-23 22:43:32,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:32,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:32,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-23 22:43:32,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2023-08-23 22:43:32,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:32,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-23 22:43:32,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:42,804 INFO L124 PetriNetUnfolderBase]: 124153/164211 cut-off events. [2023-08-23 22:43:42,804 INFO L125 PetriNetUnfolderBase]: For 63957/63957 co-relation queries the response was YES. [2023-08-23 22:43:43,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386609 conditions, 164211 events. 124153/164211 cut-off events. For 63957/63957 co-relation queries the response was YES. Maximal size of possible extension queue 8439. Compared 1153731 event pairs, 38229 based on Foata normal form. 0/148786 useless extension candidates. Maximal degree in co-relation 216145. Up to 79252 conditions per place. [2023-08-23 22:43:44,024 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 140 selfloop transitions, 25 changer transitions 0/168 dead transitions. [2023-08-23 22:43:44,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 168 transitions, 921 flow [2023-08-23 22:43:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2023-08-23 22:43:44,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2023-08-23 22:43:44,026 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 390 transitions. [2023-08-23 22:43:44,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 390 transitions. [2023-08-23 22:43:44,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:44,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 390 transitions. [2023-08-23 22:43:44,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:44,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2023-08-23 22:43:44,029 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2023-08-23 22:43:44,030 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 228 flow. Second operand 6 states and 390 transitions. [2023-08-23 22:43:44,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 168 transitions, 921 flow [2023-08-23 22:43:44,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 168 transitions, 921 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:44,566 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 399 flow [2023-08-23 22:43:44,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-08-23 22:43:44,567 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-23 22:43:44,567 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 399 flow [2023-08-23 22:43:44,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2023-08-23 22:43:44,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:44,568 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:44,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 22:43:44,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:43:44,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1019157899, now seen corresponding path program 1 times [2023-08-23 22:43:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:44,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962163489] [2023-08-23 22:43:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:44,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-23 22:43:44,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:44,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962163489] [2023-08-23 22:43:44,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962163489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:44,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:44,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:44,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805584511] [2023-08-23 22:43:44,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:44,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:44,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:44,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:44,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-23 22:43:44,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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) [2023-08-23 22:43:44,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:44,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-23 22:43:44,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:44:02,224 INFO L124 PetriNetUnfolderBase]: 188457/251259 cut-off events. [2023-08-23 22:44:02,224 INFO L125 PetriNetUnfolderBase]: For 165005/165005 co-relation queries the response was YES. [2023-08-23 22:44:03,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634261 conditions, 251259 events. 188457/251259 cut-off events. For 165005/165005 co-relation queries the response was YES. Maximal size of possible extension queue 13093. Compared 1892231 event pairs, 61281 based on Foata normal form. 0/234139 useless extension candidates. Maximal degree in co-relation 401061. Up to 126840 conditions per place. [2023-08-23 22:44:03,971 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 153 selfloop transitions, 37 changer transitions 0/193 dead transitions. [2023-08-23 22:44:03,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 193 transitions, 1297 flow [2023-08-23 22:44:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:44:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:44:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2023-08-23 22:44:03,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-23 22:44:03,973 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 387 transitions. [2023-08-23 22:44:03,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 387 transitions. [2023-08-23 22:44:03,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:44:03,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 387 transitions. [2023-08-23 22:44:03,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 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) [2023-08-23 22:44:03,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2023-08-23 22:44:03,976 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2023-08-23 22:44:03,976 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 399 flow. Second operand 6 states and 387 transitions. [2023-08-23 22:44:03,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 193 transitions, 1297 flow [2023-08-23 22:44:05,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 193 transitions, 1297 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:44:05,192 INFO L231 Difference]: Finished difference. Result has 73 places, 100 transitions, 701 flow [2023-08-23 22:44:05,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=701, PETRI_PLACES=73, PETRI_TRANSITIONS=100} [2023-08-23 22:44:05,193 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-08-23 22:44:05,193 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 100 transitions, 701 flow [2023-08-23 22:44:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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) [2023-08-23 22:44:05,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:44:05,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:44:05,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 22:44:05,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:44:05,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:44:05,194 INFO L85 PathProgramCache]: Analyzing trace with hash -432163817, now seen corresponding path program 1 times [2023-08-23 22:44:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:44:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246050671] [2023-08-23 22:44:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:44:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:44:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:44:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:44:05,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:44:05,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246050671] [2023-08-23 22:44:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246050671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:44:05,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567846265] [2023-08-23 22:44:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:44:05,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:44:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:44:05,340 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) [2023-08-23 22:44:05,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 22:44:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:44:05,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-23 22:44:05,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:44:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:44:05,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:44:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:44:05,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567846265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:44:05,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:44:05,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-23 22:44:05,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549178087] [2023-08-23 22:44:05,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:44:05,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 22:44:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:44:05,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 22:44:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-23 22:44:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 129 [2023-08-23 22:44:05,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 100 transitions, 701 flow. Second operand has 15 states, 15 states have (on average 41.266666666666666) internal successors, (619), 15 states have internal predecessors, (619), 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) [2023-08-23 22:44:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:44:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 129 [2023-08-23 22:44:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand