/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:52:44,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:52:44,546 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 14:52:44,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:52:44,550 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:52:44,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:52:44,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:52:44,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:52:44,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:52:44,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:52:44,573 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:52:44,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:52:44,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:52:44,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:52:44,574 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:52:44,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:52:44,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:52:44,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:52:44,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:52:44,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:52:44,576 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:52:44,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:52:44,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:52:44,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:52:44,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:52:44,578 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:52:44,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:52:44,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:52:44,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:52:44,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:52:44,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:52:44,580 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:52:44,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:52:44,580 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:52:44,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:52:44,581 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:52:44,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:52:44,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:52:44,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:52:44,910 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:52:44,910 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:52:44,915 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-24 14:52:46,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:52:46,262 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:52:46,262 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-24 14:52:46,272 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/349073c1f/41e750954f404c15af2a83b184610901/FLAGc919fa1b8 [2023-08-24 14:52:46,283 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/349073c1f/41e750954f404c15af2a83b184610901 [2023-08-24 14:52:46,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:52:46,286 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:52:46,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:52:46,287 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:52:46,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:52:46,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd9bbe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46, skipping insertion in model container [2023-08-24 14:52:46,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,318 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:52:46,460 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-08-24 14:52:46,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:52:46,478 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:52:46,518 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-08-24 14:52:46,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:52:46,540 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:52:46,541 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:52:46,548 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:52:46,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46 WrapperNode [2023-08-24 14:52:46,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:52:46,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:52:46,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:52:46,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:52:46,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,617 INFO L138 Inliner]: procedures = 25, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 331 [2023-08-24 14:52:46,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:52:46,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:52:46,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:52:46,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:52:46,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:52:46,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:52:46,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:52:46,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:52:46,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (1/1) ... [2023-08-24 14:52:46,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:52:46,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:52:46,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 14:52:46,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 14:52:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:52:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:52:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:52:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:52:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:52:46,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:52:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:52:46,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:52:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 14:52:46,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 14:52:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:52:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:52:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:52:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 14:52:46,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:52:46,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:52:46,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:52:46,758 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:52:46,889 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:52:46,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:52:47,365 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:52:47,511 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:52:47,511 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 14:52:47,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:52:47 BoogieIcfgContainer [2023-08-24 14:52:47,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:52:47,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:52:47,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:52:47,522 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:52:47,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:52:46" (1/3) ... [2023-08-24 14:52:47,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540b917d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:52:47, skipping insertion in model container [2023-08-24 14:52:47,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:52:46" (2/3) ... [2023-08-24 14:52:47,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540b917d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:52:47, skipping insertion in model container [2023-08-24 14:52:47,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:52:47" (3/3) ... [2023-08-24 14:52:47,525 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2023-08-24 14:52:47,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:52:47,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:52:47,543 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:52:47,656 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 14:52:47,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 270 transitions, 564 flow [2023-08-24 14:52:47,820 INFO L124 PetriNetUnfolderBase]: 25/267 cut-off events. [2023-08-24 14:52:47,820 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:52:47,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 267 events. 25/267 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 212 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 229. Up to 3 conditions per place. [2023-08-24 14:52:47,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 270 transitions, 564 flow [2023-08-24 14:52:47,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 257 transitions, 532 flow [2023-08-24 14:52:47,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:52:47,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 257 transitions, 532 flow [2023-08-24 14:52:47,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 257 transitions, 532 flow [2023-08-24 14:52:47,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 532 flow [2023-08-24 14:52:47,891 INFO L124 PetriNetUnfolderBase]: 25/257 cut-off events. [2023-08-24 14:52:47,892 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:52:47,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 257 events. 25/257 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 212 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 229. Up to 3 conditions per place. [2023-08-24 14:52:47,895 INFO L119 LiptonReduction]: Number of co-enabled transitions 2898 [2023-08-24 14:52:56,226 INFO L134 LiptonReduction]: Checked pairs total: 5510 [2023-08-24 14:52:56,226 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-24 14:52:56,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:52:56,245 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;@7c4f8f87, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:52:56,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 14:52:56,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:52:56,257 INFO L124 PetriNetUnfolderBase]: 10/36 cut-off events. [2023-08-24 14:52:56,257 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:52:56,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:56,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:56,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:56,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1678644978, now seen corresponding path program 1 times [2023-08-24 14:52:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:56,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209622499] [2023-08-24 14:52:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:52:56,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:56,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209622499] [2023-08-24 14:52:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209622499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:56,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:56,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 14:52:56,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855491995] [2023-08-24 14:52:56,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:56,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 14:52:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 14:52:56,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 14:52:56,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 539 [2023-08-24 14:52:56,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:56,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:56,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 539 [2023-08-24 14:52:56,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:52:56,732 INFO L124 PetriNetUnfolderBase]: 748/1046 cut-off events. [2023-08-24 14:52:56,733 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-24 14:52:56,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2180 conditions, 1046 events. 748/1046 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3202 event pairs, 493 based on Foata normal form. 0/791 useless extension candidates. Maximal degree in co-relation 1908. Up to 1047 conditions per place. [2023-08-24 14:52:56,745 INFO L140 encePairwiseOnDemand]: 537/539 looper letters, 35 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2023-08-24 14:52:56,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 158 flow [2023-08-24 14:52:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 14:52:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 14:52:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 515 transitions. [2023-08-24 14:52:56,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777365491651206 [2023-08-24 14:52:56,766 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 515 transitions. [2023-08-24 14:52:56,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 515 transitions. [2023-08-24 14:52:56,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:52:56,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 515 transitions. [2023-08-24 14:52:56,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:56,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 539.0) internal successors, (1617), 3 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:56,782 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 539.0) internal successors, (1617), 3 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:56,784 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 92 flow. Second operand 2 states and 515 transitions. [2023-08-24 14:52:56,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 158 flow [2023-08-24 14:52:56,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 14:52:56,789 INFO L231 Difference]: Finished difference. Result has 32 places, 35 transitions, 76 flow [2023-08-24 14:52:56,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=35} [2023-08-24 14:52:56,794 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-08-24 14:52:56,794 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 35 transitions, 76 flow [2023-08-24 14:52:56,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:56,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:56,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:56,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:52:56,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:56,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1074443410, now seen corresponding path program 1 times [2023-08-24 14:52:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31871143] [2023-08-24 14:52:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:52:57,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31871143] [2023-08-24 14:52:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31871143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:57,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:52:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925788927] [2023-08-24 14:52:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:57,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:52:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:52:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:52:57,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 539 [2023-08-24 14:52:57,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 35 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:57,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 539 [2023-08-24 14:52:57,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:52:57,321 INFO L124 PetriNetUnfolderBase]: 811/1159 cut-off events. [2023-08-24 14:52:57,321 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 14:52:57,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2359 conditions, 1159 events. 811/1159 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3691 event pairs, 544 based on Foata normal form. 42/933 useless extension candidates. Maximal degree in co-relation 2356. Up to 1047 conditions per place. [2023-08-24 14:52:57,328 INFO L140 encePairwiseOnDemand]: 529/539 looper letters, 34 selfloop transitions, 2 changer transitions 21/57 dead transitions. [2023-08-24 14:52:57,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 57 transitions, 237 flow [2023-08-24 14:52:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:52:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:52:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1055 transitions. [2023-08-24 14:52:57,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914656771799629 [2023-08-24 14:52:57,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1055 transitions. [2023-08-24 14:52:57,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1055 transitions. [2023-08-24 14:52:57,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:52:57,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1055 transitions. [2023-08-24 14:52:57,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,344 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,344 INFO L175 Difference]: Start difference. First operand has 32 places, 35 transitions, 76 flow. Second operand 5 states and 1055 transitions. [2023-08-24 14:52:57,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 57 transitions, 237 flow [2023-08-24 14:52:57,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 14:52:57,347 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 102 flow [2023-08-24 14:52:57,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-24 14:52:57,348 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-08-24 14:52:57,349 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 102 flow [2023-08-24 14:52:57,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:57,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:57,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:52:57,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:57,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1608710895, now seen corresponding path program 1 times [2023-08-24 14:52:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:57,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963888948] [2023-08-24 14:52:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:57,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:52:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963888948] [2023-08-24 14:52:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963888948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:52:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112351835] [2023-08-24 14:52:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:52:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:52:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:52:57,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 539 [2023-08-24 14:52:57,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:57,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 539 [2023-08-24 14:52:57,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:52:57,765 INFO L124 PetriNetUnfolderBase]: 996/1430 cut-off events. [2023-08-24 14:52:57,765 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-08-24 14:52:57,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1430 events. 996/1430 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4956 event pairs, 680 based on Foata normal form. 82/1197 useless extension candidates. Maximal degree in co-relation 3161. Up to 1048 conditions per place. [2023-08-24 14:52:57,771 INFO L140 encePairwiseOnDemand]: 533/539 looper letters, 35 selfloop transitions, 2 changer transitions 22/59 dead transitions. [2023-08-24 14:52:57,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 284 flow [2023-08-24 14:52:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:52:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:52:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 861 transitions. [2023-08-24 14:52:57,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2023-08-24 14:52:57,774 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 861 transitions. [2023-08-24 14:52:57,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 861 transitions. [2023-08-24 14:52:57,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:52:57,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 861 transitions. [2023-08-24 14:52:57,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 539.0) internal successors, (2695), 5 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 539.0) internal successors, (2695), 5 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,781 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 102 flow. Second operand 4 states and 861 transitions. [2023-08-24 14:52:57,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 284 flow [2023-08-24 14:52:57,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 264 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-24 14:52:57,783 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 108 flow [2023-08-24 14:52:57,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-08-24 14:52:57,784 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-24 14:52:57,784 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 108 flow [2023-08-24 14:52:57,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:57,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:57,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:52:57,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:57,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1715594717, now seen corresponding path program 1 times [2023-08-24 14:52:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:57,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349468272] [2023-08-24 14:52:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:52:57,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:57,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349468272] [2023-08-24 14:52:57,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349468272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:57,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:57,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:52:57,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134716982] [2023-08-24 14:52:57,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:57,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:52:57,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:52:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:52:57,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 539 [2023-08-24 14:52:57,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 206.5) internal successors, (826), 4 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:57,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:57,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 539 [2023-08-24 14:52:57,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:52:58,144 INFO L124 PetriNetUnfolderBase]: 1247/1783 cut-off events. [2023-08-24 14:52:58,144 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-08-24 14:52:58,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 1783 events. 1247/1783 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6448 event pairs, 870 based on Foata normal form. 92/1464 useless extension candidates. Maximal degree in co-relation 4270. Up to 1049 conditions per place. [2023-08-24 14:52:58,152 INFO L140 encePairwiseOnDemand]: 533/539 looper letters, 36 selfloop transitions, 2 changer transitions 24/62 dead transitions. [2023-08-24 14:52:58,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 62 transitions, 299 flow [2023-08-24 14:52:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:52:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:52:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 863 transitions. [2023-08-24 14:52:58,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400278293135436 [2023-08-24 14:52:58,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 863 transitions. [2023-08-24 14:52:58,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 863 transitions. [2023-08-24 14:52:58,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:52:58,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 863 transitions. [2023-08-24 14:52:58,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.75) internal successors, (863), 4 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 539.0) internal successors, (2695), 5 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 539.0) internal successors, (2695), 5 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,164 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 108 flow. Second operand 4 states and 863 transitions. [2023-08-24 14:52:58,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 62 transitions, 299 flow [2023-08-24 14:52:58,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 295 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 14:52:58,168 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 122 flow [2023-08-24 14:52:58,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-24 14:52:58,169 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-24 14:52:58,169 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 122 flow [2023-08-24 14:52:58,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.5) internal successors, (826), 4 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:58,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:58,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:52:58,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:58,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash 104174685, now seen corresponding path program 1 times [2023-08-24 14:52:58,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:58,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238950907] [2023-08-24 14:52:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:52:58,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:58,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238950907] [2023-08-24 14:52:58,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238950907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:58,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:58,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 14:52:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130667511] [2023-08-24 14:52:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:58,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:52:58,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:52:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:52:58,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 539 [2023-08-24 14:52:58,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:58,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 539 [2023-08-24 14:52:58,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:52:58,619 INFO L124 PetriNetUnfolderBase]: 1394/1946 cut-off events. [2023-08-24 14:52:58,619 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-24 14:52:58,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 1946 events. 1394/1946 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7026 event pairs, 493 based on Foata normal form. 1/1460 useless extension candidates. Maximal degree in co-relation 4913. Up to 1006 conditions per place. [2023-08-24 14:52:58,631 INFO L140 encePairwiseOnDemand]: 536/539 looper letters, 55 selfloop transitions, 2 changer transitions 6/63 dead transitions. [2023-08-24 14:52:58,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 321 flow [2023-08-24 14:52:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:52:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:52:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-08-24 14:52:58,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47557204700061845 [2023-08-24 14:52:58,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-08-24 14:52:58,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-08-24 14:52:58,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:52:58,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-08-24 14:52:58,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,640 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 122 flow. Second operand 3 states and 769 transitions. [2023-08-24 14:52:58,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 321 flow [2023-08-24 14:52:58,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 14:52:58,643 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 132 flow [2023-08-24 14:52:58,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-24 14:52:58,645 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-08-24 14:52:58,645 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 132 flow [2023-08-24 14:52:58,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:58,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:58,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 14:52:58,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:58,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash 907070616, now seen corresponding path program 1 times [2023-08-24 14:52:58,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:58,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820788212] [2023-08-24 14:52:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:52:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820788212] [2023-08-24 14:52:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820788212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:58,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:52:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756468620] [2023-08-24 14:52:58,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:52:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:52:58,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:52:58,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 539 [2023-08-24 14:52:58,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:58,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:58,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 539 [2023-08-24 14:52:58,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:52:58,998 INFO L124 PetriNetUnfolderBase]: 1590/2226 cut-off events. [2023-08-24 14:52:58,999 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2023-08-24 14:52:59,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2226 events. 1590/2226 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8580 event pairs, 467 based on Foata normal form. 0/1703 useless extension candidates. Maximal degree in co-relation 5801. Up to 1288 conditions per place. [2023-08-24 14:52:59,011 INFO L140 encePairwiseOnDemand]: 536/539 looper letters, 51 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-24 14:52:59,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 282 flow [2023-08-24 14:52:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:52:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:52:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-08-24 14:52:59,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2023-08-24 14:52:59,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-08-24 14:52:59,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-08-24 14:52:59,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:52:59,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-08-24 14:52:59,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,019 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 132 flow. Second operand 3 states and 749 transitions. [2023-08-24 14:52:59,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 282 flow [2023-08-24 14:52:59,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:52:59,023 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 146 flow [2023-08-24 14:52:59,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-24 14:52:59,025 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-08-24 14:52:59,025 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 146 flow [2023-08-24 14:52:59,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:59,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:59,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 14:52:59,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:59,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 774276055, now seen corresponding path program 1 times [2023-08-24 14:52:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:59,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822328144] [2023-08-24 14:52:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:52:59,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822328144] [2023-08-24 14:52:59,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822328144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:59,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:59,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:52:59,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829804451] [2023-08-24 14:52:59,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:59,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:52:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:52:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:52:59,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 539 [2023-08-24 14:52:59,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:59,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 539 [2023-08-24 14:52:59,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:52:59,449 INFO L124 PetriNetUnfolderBase]: 2252/3132 cut-off events. [2023-08-24 14:52:59,449 INFO L125 PetriNetUnfolderBase]: For 2012/2012 co-relation queries the response was YES. [2023-08-24 14:52:59,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8762 conditions, 3132 events. 2252/3132 cut-off events. For 2012/2012 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12560 event pairs, 887 based on Foata normal form. 0/2503 useless extension candidates. Maximal degree in co-relation 8750. Up to 2073 conditions per place. [2023-08-24 14:52:59,464 INFO L140 encePairwiseOnDemand]: 534/539 looper letters, 48 selfloop transitions, 4 changer transitions 6/58 dead transitions. [2023-08-24 14:52:59,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 324 flow [2023-08-24 14:52:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:52:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:52:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-08-24 14:52:59,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44465058750773034 [2023-08-24 14:52:59,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-08-24 14:52:59,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-08-24 14:52:59,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:52:59,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-08-24 14:52:59,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,472 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 146 flow. Second operand 3 states and 719 transitions. [2023-08-24 14:52:59,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 324 flow [2023-08-24 14:52:59,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:52:59,482 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 176 flow [2023-08-24 14:52:59,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-08-24 14:52:59,482 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2023-08-24 14:52:59,482 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 176 flow [2023-08-24 14:52:59,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:59,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 14:52:59,484 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:59,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1662798915, now seen corresponding path program 2 times [2023-08-24 14:52:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:59,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3066419] [2023-08-24 14:52:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:59,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:52:59,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:59,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3066419] [2023-08-24 14:52:59,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3066419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:52:59,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:52:59,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:52:59,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677335356] [2023-08-24 14:52:59,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:52:59,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:52:59,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:52:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:52:59,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 539 [2023-08-24 14:52:59,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:59,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:59,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 539 [2023-08-24 14:52:59,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:53:00,246 INFO L124 PetriNetUnfolderBase]: 2852/3948 cut-off events. [2023-08-24 14:53:00,246 INFO L125 PetriNetUnfolderBase]: For 2592/2592 co-relation queries the response was YES. [2023-08-24 14:53:00,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 3948 events. 2852/3948 cut-off events. For 2592/2592 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16110 event pairs, 1079 based on Foata normal form. 72/3217 useless extension candidates. Maximal degree in co-relation 11822. Up to 2045 conditions per place. [2023-08-24 14:53:00,267 INFO L140 encePairwiseOnDemand]: 533/539 looper letters, 40 selfloop transitions, 5 changer transitions 15/60 dead transitions. [2023-08-24 14:53:00,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 362 flow [2023-08-24 14:53:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:53:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:53:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1098 transitions. [2023-08-24 14:53:00,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074211502782931 [2023-08-24 14:53:00,270 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1098 transitions. [2023-08-24 14:53:00,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1098 transitions. [2023-08-24 14:53:00,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:53:00,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1098 transitions. [2023-08-24 14:53:00,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,278 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,278 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 176 flow. Second operand 5 states and 1098 transitions. [2023-08-24 14:53:00,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 362 flow [2023-08-24 14:53:00,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:53:00,283 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 175 flow [2023-08-24 14:53:00,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-24 14:53:00,284 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2023-08-24 14:53:00,284 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 175 flow [2023-08-24 14:53:00,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:53:00,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:53:00,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 14:53:00,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:53:00,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:53:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash 231384739, now seen corresponding path program 3 times [2023-08-24 14:53:00,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:53:00,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275891782] [2023-08-24 14:53:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:53:00,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:53:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:53:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:53:00,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:53:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275891782] [2023-08-24 14:53:00,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275891782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:53:00,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:53:00,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:53:00,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376459859] [2023-08-24 14:53:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:53:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:53:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:53:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:53:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:53:00,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 539 [2023-08-24 14:53:00,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:53:00,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 539 [2023-08-24 14:53:00,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:53:00,867 INFO L124 PetriNetUnfolderBase]: 2062/2871 cut-off events. [2023-08-24 14:53:00,867 INFO L125 PetriNetUnfolderBase]: For 2267/2267 co-relation queries the response was YES. [2023-08-24 14:53:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8633 conditions, 2871 events. 2062/2871 cut-off events. For 2267/2267 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11429 event pairs, 633 based on Foata normal form. 10/2286 useless extension candidates. Maximal degree in co-relation 8619. Up to 1752 conditions per place. [2023-08-24 14:53:00,883 INFO L140 encePairwiseOnDemand]: 533/539 looper letters, 44 selfloop transitions, 5 changer transitions 8/57 dead transitions. [2023-08-24 14:53:00,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 354 flow [2023-08-24 14:53:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:53:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:53:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1095 transitions. [2023-08-24 14:53:00,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40630797773654914 [2023-08-24 14:53:00,888 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1095 transitions. [2023-08-24 14:53:00,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1095 transitions. [2023-08-24 14:53:00,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:53:00,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1095 transitions. [2023-08-24 14:53:00,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,897 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,897 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 175 flow. Second operand 5 states and 1095 transitions. [2023-08-24 14:53:00,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 354 flow [2023-08-24 14:53:00,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 57 transitions, 339 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-24 14:53:00,903 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 179 flow [2023-08-24 14:53:00,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-08-24 14:53:00,904 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2023-08-24 14:53:00,904 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 179 flow [2023-08-24 14:53:00,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:00,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:53:00,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:53:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 14:53:00,905 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:53:00,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:53:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash 668965985, now seen corresponding path program 4 times [2023-08-24 14:53:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:53:00,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585535374] [2023-08-24 14:53:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:53:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:53:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:53:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:53:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:53:01,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585535374] [2023-08-24 14:53:01,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585535374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:53:01,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372653490] [2023-08-24 14:53:01,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 14:53:01,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:53:01,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:53:01,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:53:01,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 14:53:01,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 14:53:01,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:53:01,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:53:01,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:53:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 14:53:01,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 14:53:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372653490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:53:01,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 14:53:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-08-24 14:53:01,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605599984] [2023-08-24 14:53:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:53:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:53:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:53:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:53:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:53:01,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 539 [2023-08-24 14:53:01,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:01,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:53:01,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 539 [2023-08-24 14:53:01,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:53:01,876 INFO L124 PetriNetUnfolderBase]: 2629/3687 cut-off events. [2023-08-24 14:53:01,876 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2023-08-24 14:53:01,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11093 conditions, 3687 events. 2629/3687 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15337 event pairs, 874 based on Foata normal form. 132/3118 useless extension candidates. Maximal degree in co-relation 11079. Up to 2808 conditions per place. [2023-08-24 14:53:01,889 INFO L140 encePairwiseOnDemand]: 535/539 looper letters, 60 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-24 14:53:01,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 405 flow [2023-08-24 14:53:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:53:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:53:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-24 14:53:01,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650587507730365 [2023-08-24 14:53:01,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-24 14:53:01,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-24 14:53:01,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:53:01,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-24 14:53:01,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:01,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:01,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:01,897 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 179 flow. Second operand 3 states and 752 transitions. [2023-08-24 14:53:01,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 405 flow [2023-08-24 14:53:01,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 375 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-24 14:53:01,901 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 178 flow [2023-08-24 14:53:01,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-08-24 14:53:01,902 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2023-08-24 14:53:01,902 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 178 flow [2023-08-24 14:53:01,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:01,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:53:01,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:53:01,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 14:53:02,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 14:53:02,110 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:53:02,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:53:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1681195237, now seen corresponding path program 5 times [2023-08-24 14:53:02,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:53:02,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776247087] [2023-08-24 14:53:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:53:02,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:53:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:53:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:53:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:53:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776247087] [2023-08-24 14:53:02,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776247087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:53:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048774888] [2023-08-24 14:53:02,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 14:53:02,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:53:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:53:02,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:53:02,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 14:53:02,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 14:53:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:53:02,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:53:02,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:53:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 14:53:02,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 14:53:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048774888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:53:02,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 14:53:02,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-08-24 14:53:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605305384] [2023-08-24 14:53:02,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:53:02,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:53:02,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:53:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:53:02,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 14:53:02,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 539 [2023-08-24 14:53:02,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:02,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:53:02,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 539 [2023-08-24 14:53:02,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:53:02,963 INFO L124 PetriNetUnfolderBase]: 2608/3682 cut-off events. [2023-08-24 14:53:02,963 INFO L125 PetriNetUnfolderBase]: For 3443/3443 co-relation queries the response was YES. [2023-08-24 14:53:02,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11282 conditions, 3682 events. 2608/3682 cut-off events. For 3443/3443 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14945 event pairs, 797 based on Foata normal form. 176/3231 useless extension candidates. Maximal degree in co-relation 11268. Up to 2272 conditions per place. [2023-08-24 14:53:02,980 INFO L140 encePairwiseOnDemand]: 535/539 looper letters, 56 selfloop transitions, 3 changer transitions 4/63 dead transitions. [2023-08-24 14:53:02,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 394 flow [2023-08-24 14:53:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:53:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:53:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2023-08-24 14:53:02,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681508967223253 [2023-08-24 14:53:02,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2023-08-24 14:53:02,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2023-08-24 14:53:02,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:53:02,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2023-08-24 14:53:02,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:02,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:02,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:02,988 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 178 flow. Second operand 3 states and 757 transitions. [2023-08-24 14:53:02,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 394 flow [2023-08-24 14:53:02,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:53:02,992 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 199 flow [2023-08-24 14:53:02,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-24 14:53:02,993 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2023-08-24 14:53:02,993 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 199 flow [2023-08-24 14:53:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:02,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:53:02,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:53:03,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 14:53:03,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 14:53:03,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:53:03,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:53:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1689641481, now seen corresponding path program 6 times [2023-08-24 14:53:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:53:03,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195487246] [2023-08-24 14:53:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:53:03,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:53:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:53:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:53:03,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:53:03,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195487246] [2023-08-24 14:53:03,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195487246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:53:03,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007291672] [2023-08-24 14:53:03,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 14:53:03,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:53:03,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:53:03,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:53:03,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 14:53:03,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 14:53:03,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:53:03,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 14:53:03,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:53:03,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:53:03,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 14:53:03,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:53:03,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 14:53:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:53:03,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:53:03,900 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 (Array Int Int)) (v_ArrVal_433 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_433) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_434) c_~q1~0.base) (+ (* c_~q1_back~0 4) c_~q1~0.offset)) 2))) is different from false [2023-08-24 14:53:03,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-08-24 14:53:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:53:03,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007291672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:53:03,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:53:03,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-08-24 14:53:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814683557] [2023-08-24 14:53:03,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:53:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 14:53:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:53:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 14:53:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=96, Unknown=1, NotChecked=20, Total=156 [2023-08-24 14:53:03,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 539 [2023-08-24 14:53:03,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 199 flow. Second operand has 13 states, 13 states have (on average 210.46153846153845) internal successors, (2736), 13 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:03,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:53:03,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 539 [2023-08-24 14:53:03,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:53:04,264 INFO L124 PetriNetUnfolderBase]: 1712/2423 cut-off events. [2023-08-24 14:53:04,264 INFO L125 PetriNetUnfolderBase]: For 2193/2193 co-relation queries the response was YES. [2023-08-24 14:53:04,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 2423 events. 1712/2423 cut-off events. For 2193/2193 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9024 event pairs, 1026 based on Foata normal form. 104/2060 useless extension candidates. Maximal degree in co-relation 7933. Up to 2404 conditions per place. [2023-08-24 14:53:04,272 INFO L140 encePairwiseOnDemand]: 534/539 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2023-08-24 14:53:04,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 274 flow [2023-08-24 14:53:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:53:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:53:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1063 transitions. [2023-08-24 14:53:04,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39443413729128013 [2023-08-24 14:53:04,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1063 transitions. [2023-08-24 14:53:04,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1063 transitions. [2023-08-24 14:53:04,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:53:04,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1063 transitions. [2023-08-24 14:53:04,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.6) internal successors, (1063), 5 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:04,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:04,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:04,283 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 199 flow. Second operand 5 states and 1063 transitions. [2023-08-24 14:53:04,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 274 flow [2023-08-24 14:53:04,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 41 transitions, 257 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-24 14:53:04,287 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2023-08-24 14:53:04,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2023-08-24 14:53:04,287 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2023-08-24 14:53:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2023-08-24 14:53:04,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.46153846153845) internal successors, (2736), 13 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:04,291 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 14:53:04,291 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 14:53:04,291 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 14:53:04,291 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 14:53:04,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 14:53:04,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:53:04,498 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1] [2023-08-24 14:53:04,501 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 14:53:04,501 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 14:53:04,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:53:04 BasicIcfg [2023-08-24 14:53:04,505 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 14:53:04,506 INFO L158 Benchmark]: Toolchain (without parser) took 18219.81ms. Allocated memory was 392.2MB in the beginning and 815.8MB in the end (delta: 423.6MB). Free memory was 368.3MB in the beginning and 516.0MB in the end (delta: -147.7MB). Peak memory consumption was 278.3MB. Max. memory is 16.0GB. [2023-08-24 14:53:04,506 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 392.2MB. Free memory is still 370.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:53:04,506 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.59ms. Allocated memory is still 392.2MB. Free memory was 368.3MB in the beginning and 355.5MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 14:53:04,506 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.85ms. Allocated memory is still 392.2MB. Free memory was 355.5MB in the beginning and 352.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-24 14:53:04,507 INFO L158 Benchmark]: Boogie Preprocessor took 51.47ms. Allocated memory is still 392.2MB. Free memory was 352.7MB in the beginning and 350.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 14:53:04,507 INFO L158 Benchmark]: RCFGBuilder took 845.72ms. Allocated memory is still 392.2MB. Free memory was 350.6MB in the beginning and 308.0MB in the end (delta: 42.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.0GB. [2023-08-24 14:53:04,507 INFO L158 Benchmark]: TraceAbstraction took 16986.41ms. Allocated memory was 392.2MB in the beginning and 815.8MB in the end (delta: 423.6MB). Free memory was 308.0MB in the beginning and 516.0MB in the end (delta: -208.0MB). Peak memory consumption was 217.5MB. Max. memory is 16.0GB. [2023-08-24 14:53:04,508 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 392.2MB. Free memory is still 370.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 263.59ms. Allocated memory is still 392.2MB. Free memory was 368.3MB in the beginning and 355.5MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 65.85ms. Allocated memory is still 392.2MB. Free memory was 355.5MB in the beginning and 352.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 51.47ms. Allocated memory is still 392.2MB. Free memory was 352.7MB in the beginning and 350.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 845.72ms. Allocated memory is still 392.2MB. Free memory was 350.6MB in the beginning and 308.0MB in the end (delta: 42.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.0GB. * TraceAbstraction took 16986.41ms. Allocated memory was 392.2MB in the beginning and 815.8MB in the end (delta: 423.6MB). Free memory was 308.0MB in the beginning and 516.0MB in the end (delta: -208.0MB). Peak memory consumption was 217.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.4s, 242 PlacesBefore, 37 PlacesAfterwards, 257 TransitionsBefore, 37 TransitionsAfterwards, 2898 CoEnabledTransitionPairs, 7 FixpointIterations, 156 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 38 TrivialYvCompositions, 17 ConcurrentYvCompositions, 15 ChoiceCompositions, 269 TotalNumberOfCompositions, 5510 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4056, independent: 3918, independent conditional: 0, independent unconditional: 3918, dependent: 138, dependent conditional: 0, dependent unconditional: 138, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1697, independent: 1662, independent conditional: 0, independent unconditional: 1662, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4056, independent: 2256, independent conditional: 0, independent unconditional: 2256, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 1697, unknown conditional: 0, unknown unconditional: 1697] , Statistics on independence cache: Total cache size (in pairs): 163, Positive cache size: 150, Positive conditional cache size: 0, Positive unconditional cache size: 150, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 156]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 292 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.8s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 189 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 189 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 30 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1018 IncrementalHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 0 mSDtfsCounter, 1018 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 182 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=11, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 451 NumberOfCodeBlocks, 451 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 468 ConstructedInterpolants, 5 QuantifiedInterpolants, 1883 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1251 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 16 InterpolantComputations, 11 PerfectInterpolantSequences, 72/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 14:53:04,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...