/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/goblint-regression/28-race_reach_84-list2_racing2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:15:32,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:15:32,107 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 00:15:32,110 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:15:32,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:15:32,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:15:32,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:15:32,148 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:15:32,148 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:15:32,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:15:32,149 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:15:32,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:15:32,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:15:32,152 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:15:32,152 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:15:32,152 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:15:32,152 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:15:32,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:15:32,153 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:15:32,153 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:15:32,153 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:15:32,154 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:15:32,155 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:15:32,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:15:32,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:15:32,155 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:15:32,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:15:32,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:15:32,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:15:32,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:15:32,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:15:32,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:15:32,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:15:32,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:15:32,156 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:15:32,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:15:32,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:15:32,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:15:32,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:15:32,440 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:15:32,440 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:15:32,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_84-list2_racing2.i [2023-08-24 00:15:33,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:15:33,850 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:15:33,850 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_84-list2_racing2.i [2023-08-24 00:15:33,871 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/358b7a20b/40ff194de010477c9d6878e9c997068b/FLAGfd4a9634f [2023-08-24 00:15:33,881 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/358b7a20b/40ff194de010477c9d6878e9c997068b [2023-08-24 00:15:33,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:15:33,884 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:15:33,886 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:15:33,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:15:33,888 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:15:33,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:15:33" (1/1) ... [2023-08-24 00:15:33,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5161c6f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:33, skipping insertion in model container [2023-08-24 00:15:33,889 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:15:33" (1/1) ... [2023-08-24 00:15:33,925 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:15:34,294 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_84-list2_racing2.i[47038,47051] [2023-08-24 00:15:34,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:15:34,346 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:15:34,367 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 00:15:34,368 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 00:15:34,375 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_84-list2_racing2.i[47038,47051] [2023-08-24 00:15:34,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:15:34,452 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:15:34,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34 WrapperNode [2023-08-24 00:15:34,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:15:34,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:15:34,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:15:34,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:15:34,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,483 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,520 INFO L138 Inliner]: procedures = 279, calls = 88, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 390 [2023-08-24 00:15:34,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:15:34,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:15:34,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:15:34,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:15:34,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,539 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,539 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:15:34,580 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:15:34,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:15:34,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:15:34,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (1/1) ... [2023-08-24 00:15:34,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:15:34,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:15:34,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 00:15:34,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 00:15:34,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-24 00:15:34,656 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-24 00:15:34,656 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 00:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:15:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 00:15:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2023-08-24 00:15:34,657 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2023-08-24 00:15:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:15:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:15:34,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:15:34,658 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:15:34,791 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:15:34,792 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:15:35,213 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:15:35,219 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:15:35,219 INFO L302 CfgBuilder]: Removed 29 assume(true) statements. [2023-08-24 00:15:35,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:15:35 BoogieIcfgContainer [2023-08-24 00:15:35,221 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:15:35,223 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:15:35,223 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:15:35,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:15:35,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:15:33" (1/3) ... [2023-08-24 00:15:35,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a341eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:15:35, skipping insertion in model container [2023-08-24 00:15:35,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:15:34" (2/3) ... [2023-08-24 00:15:35,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a341eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:15:35, skipping insertion in model container [2023-08-24 00:15:35,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:15:35" (3/3) ... [2023-08-24 00:15:35,227 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_84-list2_racing2.i [2023-08-24 00:15:35,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:15:35,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 00:15:35,240 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:15:35,317 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-24 00:15:35,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 399 transitions, 840 flow [2023-08-24 00:15:35,661 INFO L124 PetriNetUnfolderBase]: 188/1453 cut-off events. [2023-08-24 00:15:35,662 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-24 00:15:35,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1453 events. 188/1453 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9595 event pairs, 0 based on Foata normal form. 0/1257 useless extension candidates. Maximal degree in co-relation 748. Up to 16 conditions per place. [2023-08-24 00:15:35,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 358 places, 399 transitions, 840 flow [2023-08-24 00:15:35,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 399 transitions, 840 flow [2023-08-24 00:15:35,706 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:15:35,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 399 transitions, 840 flow [2023-08-24 00:15:35,719 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 399 transitions, 840 flow [2023-08-24 00:15:35,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 399 transitions, 840 flow [2023-08-24 00:15:35,920 INFO L124 PetriNetUnfolderBase]: 188/1453 cut-off events. [2023-08-24 00:15:35,920 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-24 00:15:35,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1453 events. 188/1453 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9595 event pairs, 0 based on Foata normal form. 0/1257 useless extension candidates. Maximal degree in co-relation 748. Up to 16 conditions per place. [2023-08-24 00:15:35,993 INFO L119 LiptonReduction]: Number of co-enabled transitions 70542 [2023-08-24 00:15:50,135 INFO L134 LiptonReduction]: Checked pairs total: 129420 [2023-08-24 00:15:50,135 INFO L136 LiptonReduction]: Total number of compositions: 320 [2023-08-24 00:15:50,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:15:50,171 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;@3fc3af8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:15:50,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 00:15:50,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:15:50,178 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2023-08-24 00:15:50,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:15:50,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:15:50,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:15:50,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 00:15:50,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:15:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1878933761, now seen corresponding path program 1 times [2023-08-24 00:15:50,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:15:50,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464751012] [2023-08-24 00:15:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:15:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:15:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:15:50,337 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:15:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:15:50,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:15:50,414 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:15:50,415 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-24 00:15:50,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-24 00:15:50,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-24 00:15:50,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-24 00:15:50,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-24 00:15:50,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-24 00:15:50,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-24 00:15:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:15:50,418 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 00:15:50,420 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:15:50,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:15:50,503 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-24 00:15:50,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 540 places, 614 transitions, 1318 flow [2023-08-24 00:15:52,125 INFO L124 PetriNetUnfolderBase]: 1211/6875 cut-off events. [2023-08-24 00:15:52,126 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-24 00:15:52,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 6875 events. 1211/6875 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 63439 event pairs, 22 based on Foata normal form. 0/5948 useless extension candidates. Maximal degree in co-relation 4336. Up to 192 conditions per place. [2023-08-24 00:15:52,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 540 places, 614 transitions, 1318 flow [2023-08-24 00:15:52,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 540 places, 614 transitions, 1318 flow [2023-08-24 00:15:52,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:15:52,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 540 places, 614 transitions, 1318 flow [2023-08-24 00:15:52,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 540 places, 614 transitions, 1318 flow [2023-08-24 00:15:52,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 540 places, 614 transitions, 1318 flow [2023-08-24 00:15:53,807 INFO L124 PetriNetUnfolderBase]: 1211/6875 cut-off events. [2023-08-24 00:15:53,807 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-24 00:15:53,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 6875 events. 1211/6875 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 63439 event pairs, 22 based on Foata normal form. 0/5948 useless extension candidates. Maximal degree in co-relation 4336. Up to 192 conditions per place. [2023-08-24 00:15:54,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 231784 [2023-08-24 00:16:09,960 INFO L134 LiptonReduction]: Checked pairs total: 478364 [2023-08-24 00:16:09,960 INFO L136 LiptonReduction]: Total number of compositions: 478 [2023-08-24 00:16:09,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:16:09,963 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;@3fc3af8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:16:09,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-24 00:16:09,970 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:16:09,970 INFO L124 PetriNetUnfolderBase]: 22/123 cut-off events. [2023-08-24 00:16:09,970 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 00:16:09,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:16:09,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:16:09,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-24 00:16:09,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:16:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1329673769, now seen corresponding path program 1 times [2023-08-24 00:16:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:16:09,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565442926] [2023-08-24 00:16:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:16:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:16:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:16:09,997 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:16:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:16:10,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:16:10,020 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:16:10,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-24 00:16:10,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-24 00:16:10,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-08-24 00:16:10,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 9 remaining) [2023-08-24 00:16:10,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 9 remaining) [2023-08-24 00:16:10,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-24 00:16:10,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-24 00:16:10,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-24 00:16:10,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-24 00:16:10,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:16:10,021 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 00:16:10,022 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:16:10,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:16:10,078 INFO L144 ThreadInstanceAdder]: Constructed 27 joinOtherThreadTransitions. [2023-08-24 00:16:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 722 places, 829 transitions, 1802 flow [2023-08-24 00:16:23,477 INFO L124 PetriNetUnfolderBase]: 9176/35619 cut-off events. [2023-08-24 00:16:23,477 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2023-08-24 00:16:24,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42793 conditions, 35619 events. 9176/35619 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 397705 event pairs, 1024 based on Foata normal form. 0/31227 useless extension candidates. Maximal degree in co-relation 22998. Up to 2304 conditions per place. [2023-08-24 00:16:24,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 722 places, 829 transitions, 1802 flow [2023-08-24 00:16:25,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 722 places, 829 transitions, 1802 flow [2023-08-24 00:16:25,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:16:25,919 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 722 places, 829 transitions, 1802 flow [2023-08-24 00:16:25,919 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 722 places, 829 transitions, 1802 flow [2023-08-24 00:16:25,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 722 places, 829 transitions, 1802 flow [2023-08-24 00:16:38,337 INFO L124 PetriNetUnfolderBase]: 9176/35619 cut-off events. [2023-08-24 00:16:38,337 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2023-08-24 00:16:39,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42793 conditions, 35619 events. 9176/35619 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 397705 event pairs, 1024 based on Foata normal form. 0/31227 useless extension candidates. Maximal degree in co-relation 22998. Up to 2304 conditions per place. [2023-08-24 00:16:42,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 483726 [2023-08-24 00:17:00,378 INFO L134 LiptonReduction]: Checked pairs total: 1040675 [2023-08-24 00:17:00,378 INFO L136 LiptonReduction]: Total number of compositions: 635 [2023-08-24 00:17:00,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:17:00,382 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;@3fc3af8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:17:00,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-24 00:17:00,389 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:17:00,389 INFO L124 PetriNetUnfolderBase]: 21/119 cut-off events. [2023-08-24 00:17:00,389 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:17:00,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:17:00,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:17:00,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-08-24 00:17:00,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:17:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1497442618, now seen corresponding path program 1 times [2023-08-24 00:17:00,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:17:00,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473609456] [2023-08-24 00:17:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:17:00,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:17:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:17:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:17:00,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:17:00,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473609456] [2023-08-24 00:17:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473609456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:17:00,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:17:00,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:17:00,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871645021] [2023-08-24 00:17:00,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:17:00,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:17:00,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:17:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:17:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:17:00,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 700 out of 1464 [2023-08-24 00:17:00,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 303 transitions, 750 flow. Second operand has 3 states, 3 states have (on average 703.3333333333334) internal successors, (2110), 3 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:17:00,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:17:00,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 700 of 1464 [2023-08-24 00:17:00,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand