/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-5.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:34:30,377 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:34:30,460 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:34:30,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:34:30,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:34:30,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:34:30,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:34:30,501 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:34:30,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:34:30,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:34:30,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:34:30,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:34:30,506 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:34:30,508 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:34:30,508 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:34:30,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:34:30,508 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:34:30,508 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:34:30,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:34:30,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:34:30,509 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:34:30,509 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:34:30,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:34:30,511 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:34:30,511 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:34:30,511 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:34:30,511 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:34:30,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:34:30,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:34:30,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:34:30,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:34:30,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:34:30,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:34:30,514 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:34:30,515 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:34:30,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:34:30,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:34:30,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:34:30,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:34:30,762 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:34:30,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-5.wvr_bound2.c [2023-08-04 03:34:31,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:34:32,171 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:34:32,172 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-5.wvr_bound2.c [2023-08-04 03:34:32,179 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35ab812fc/714a0845bfd643319ba4f79240e176f9/FLAG63d80f161 [2023-08-04 03:34:32,195 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35ab812fc/714a0845bfd643319ba4f79240e176f9 [2023-08-04 03:34:32,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:34:32,201 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:34:32,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:34:32,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:34:32,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:34:32,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4772c115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32, skipping insertion in model container [2023-08-04 03:34:32,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,236 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:34:32,394 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-5.wvr_bound2.c[2806,2819] [2023-08-04 03:34:32,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:34:32,412 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:34:32,438 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-5.wvr_bound2.c[2806,2819] [2023-08-04 03:34:32,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:34:32,458 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:34:32,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32 WrapperNode [2023-08-04 03:34:32,459 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:34:32,460 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:34:32,460 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:34:32,460 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:34:32,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,483 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,507 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 199 [2023-08-04 03:34:32,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:34:32,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:34:32,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:34:32,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:34:32,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:34:32,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:34:32,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:34:32,538 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:34:32,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (1/1) ... [2023-08-04 03:34:32,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:34:32,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:34:32,586 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) [2023-08-04 03:34:32,601 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 [2023-08-04 03:34:32,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:34:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:34:32,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:34:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:34:32,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:34:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:34:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:34:32,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:34:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:34:32,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:34:32,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:34:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:34:32,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:34:32,635 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:34:32,752 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:34:32,754 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:34:33,130 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:34:33,139 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:34:33,140 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 03:34:33,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:34:33 BoogieIcfgContainer [2023-08-04 03:34:33,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:34:33,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:34:33,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:34:33,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:34:33,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:34:32" (1/3) ... [2023-08-04 03:34:33,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc447cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:34:33, skipping insertion in model container [2023-08-04 03:34:33,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:32" (2/3) ... [2023-08-04 03:34:33,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc447cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:34:33, skipping insertion in model container [2023-08-04 03:34:33,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:34:33" (3/3) ... [2023-08-04 03:34:33,149 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-5.wvr_bound2.c [2023-08-04 03:34:33,155 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:34:33,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:34:33,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:34:33,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:34:33,255 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:34:33,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 474 flow [2023-08-04 03:34:33,419 INFO L124 PetriNetUnfolderBase]: 49/427 cut-off events. [2023-08-04 03:34:33,419 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:34:33,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 49/427 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1340 event pairs, 0 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2023-08-04 03:34:33,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 226 transitions, 474 flow [2023-08-04 03:34:33,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 226 transitions, 474 flow [2023-08-04 03:34:33,437 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:34:33,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 226 transitions, 474 flow [2023-08-04 03:34:33,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 226 transitions, 474 flow [2023-08-04 03:34:33,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 474 flow [2023-08-04 03:34:33,519 INFO L124 PetriNetUnfolderBase]: 49/427 cut-off events. [2023-08-04 03:34:33,520 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:34:33,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 49/427 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1340 event pairs, 0 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2023-08-04 03:34:33,536 INFO L119 LiptonReduction]: Number of co-enabled transitions 11870 [2023-08-04 03:34:38,328 INFO L134 LiptonReduction]: Checked pairs total: 16237 [2023-08-04 03:34:38,329 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-08-04 03:34:38,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:34:38,348 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=true, 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;@7725471f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:34:38,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:34:38,373 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:34:38,374 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 03:34:38,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:34:38,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:38,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:34:38,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:34:38,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:38,379 INFO L85 PathProgramCache]: Analyzing trace with hash 625038081, now seen corresponding path program 1 times [2023-08-04 03:34:38,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:38,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850513184] [2023-08-04 03:34:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:38,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:34:38,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:38,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850513184] [2023-08-04 03:34:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850513184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:34:38,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:34:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:34:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798599537] [2023-08-04 03:34:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:34:38,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:34:38,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:34:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:34:38,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 455 [2023-08-04 03:34:38,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2023-08-04 03:34:38,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:38,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 455 [2023-08-04 03:34:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:34:39,039 INFO L124 PetriNetUnfolderBase]: 1059/1704 cut-off events. [2023-08-04 03:34:39,040 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-04 03:34:39,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 1704 events. 1059/1704 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8189 event pairs, 727 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 2756. Up to 1619 conditions per place. [2023-08-04 03:34:39,047 INFO L140 encePairwiseOnDemand]: 448/455 looper letters, 23 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2023-08-04 03:34:39,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 180 flow [2023-08-04 03:34:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:34:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:34:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-04 03:34:39,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463003663003663 [2023-08-04 03:34:39,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-04 03:34:39,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-04 03:34:39,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:34:39,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-04 03:34:39,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2023-08-04 03:34:39,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-08-04 03:34:39,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 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) [2023-08-04 03:34:39,095 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 116 flow. Second operand 3 states and 632 transitions. [2023-08-04 03:34:39,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 180 flow [2023-08-04 03:34:39,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:34:39,104 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 80 flow [2023-08-04 03:34:39,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=80, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2023-08-04 03:34:39,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-04 03:34:39,114 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 80 flow [2023-08-04 03:34:39,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2023-08-04 03:34:39,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:39,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:34:39,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:34:39,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:34:39,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2095606235, now seen corresponding path program 1 times [2023-08-04 03:34:39,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561526127] [2023-08-04 03:34:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:34:39,180 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:34:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:34:39,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:34:39,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:34:39,216 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:34:39,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:34:39,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:34:39,219 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:34:39,221 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:34:39,222 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:34:39,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:34:39,265 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:34:39,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 322 transitions, 692 flow [2023-08-04 03:34:39,475 INFO L124 PetriNetUnfolderBase]: 171/1255 cut-off events. [2023-08-04 03:34:39,475 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:34:39,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1255 events. 171/1255 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7264 event pairs, 2 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 766. Up to 32 conditions per place. [2023-08-04 03:34:39,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 322 transitions, 692 flow [2023-08-04 03:34:39,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 322 transitions, 692 flow [2023-08-04 03:34:39,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:34:39,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 322 transitions, 692 flow [2023-08-04 03:34:39,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 322 transitions, 692 flow [2023-08-04 03:34:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 322 transitions, 692 flow [2023-08-04 03:34:39,690 INFO L124 PetriNetUnfolderBase]: 171/1255 cut-off events. [2023-08-04 03:34:39,691 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:34:39,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1255 events. 171/1255 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7264 event pairs, 2 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 766. Up to 32 conditions per place. [2023-08-04 03:34:39,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 41636 [2023-08-04 03:34:44,922 INFO L134 LiptonReduction]: Checked pairs total: 75396 [2023-08-04 03:34:44,922 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-08-04 03:34:44,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:34:44,925 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=true, 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;@7725471f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:34:44,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:34:44,933 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:34:44,933 INFO L124 PetriNetUnfolderBase]: 8/89 cut-off events. [2023-08-04 03:34:44,933 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:34:44,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:44,933 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:34:44,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:34:44,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1270563163, now seen corresponding path program 1 times [2023-08-04 03:34:44,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:44,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524934540] [2023-08-04 03:34:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:34:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524934540] [2023-08-04 03:34:45,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524934540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:34:45,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:34:45,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:34:45,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865129861] [2023-08-04 03:34:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:34:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:34:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:34:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:34:45,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 636 [2023-08-04 03:34:45,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 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) [2023-08-04 03:34:45,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:45,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 636 [2023-08-04 03:34:45,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:27,937 INFO L124 PetriNetUnfolderBase]: 540961/674334 cut-off events. [2023-08-04 03:35:27,937 INFO L125 PetriNetUnfolderBase]: For 39592/39592 co-relation queries the response was YES. [2023-08-04 03:35:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361017 conditions, 674334 events. 540961/674334 cut-off events. For 39592/39592 co-relation queries the response was YES. Maximal size of possible extension queue 11215. Compared 4049522 event pairs, 399478 based on Foata normal form. 37877/497742 useless extension candidates. Maximal degree in co-relation 445518. Up to 671262 conditions per place. [2023-08-04 03:35:30,832 INFO L140 encePairwiseOnDemand]: 626/636 looper letters, 55 selfloop transitions, 2 changer transitions 17/82 dead transitions. [2023-08-04 03:35:30,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 82 transitions, 356 flow [2023-08-04 03:35:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:35:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:35:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-08-04 03:35:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806079664570231 [2023-08-04 03:35:30,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-08-04 03:35:30,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-08-04 03:35:30,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:30,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-08-04 03:35:30,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 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) [2023-08-04 03:35:30,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 636.0) internal successors, (2544), 4 states have internal predecessors, (2544), 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) [2023-08-04 03:35:30,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 636.0) internal successors, (2544), 4 states have internal predecessors, (2544), 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) [2023-08-04 03:35:30,843 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 224 flow. Second operand 3 states and 917 transitions. [2023-08-04 03:35:30,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 82 transitions, 356 flow [2023-08-04 03:35:30,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:35:30,857 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 164 flow [2023-08-04 03:35:30,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=636, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2023-08-04 03:35:30,858 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 03:35:30,858 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 164 flow [2023-08-04 03:35:30,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 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) [2023-08-04 03:35:30,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:30,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:35:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:35:30,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:35:30,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 39989987, now seen corresponding path program 1 times [2023-08-04 03:35:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:30,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976863145] [2023-08-04 03:35:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:30,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:35:30,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976863145] [2023-08-04 03:35:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976863145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:35:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965457081] [2023-08-04 03:35:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:30,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:35:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:35:30,929 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) [2023-08-04 03:35:30,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:35:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:31,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:35:31,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:35:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:35:31,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:35:31,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965457081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:35:31,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:35:31,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:35:31,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515141478] [2023-08-04 03:35:31,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:35:31,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:35:31,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:35:31,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:35:31,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 636 [2023-08-04 03:35:31,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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) [2023-08-04 03:35:31,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:31,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 636 [2023-08-04 03:35:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:42,295 INFO L124 PetriNetUnfolderBase]: 157926/197422 cut-off events. [2023-08-04 03:35:42,295 INFO L125 PetriNetUnfolderBase]: For 2159/2159 co-relation queries the response was YES. [2023-08-04 03:35:42,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396764 conditions, 197422 events. 157926/197422 cut-off events. For 2159/2159 co-relation queries the response was YES. Maximal size of possible extension queue 3428. Compared 1087086 event pairs, 63514 based on Foata normal form. 0/144455 useless extension candidates. Maximal degree in co-relation 396749. Up to 196772 conditions per place. [2023-08-04 03:35:43,480 INFO L140 encePairwiseOnDemand]: 632/636 looper letters, 69 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-04 03:35:43,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 340 flow [2023-08-04 03:35:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:35:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:35:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1464 transitions. [2023-08-04 03:35:43,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46037735849056605 [2023-08-04 03:35:43,485 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1464 transitions. [2023-08-04 03:35:43,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1464 transitions. [2023-08-04 03:35:43,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:43,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1464 transitions. [2023-08-04 03:35:43,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 292.8) internal successors, (1464), 5 states have internal predecessors, (1464), 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) [2023-08-04 03:35:43,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 636.0) internal successors, (3816), 6 states have internal predecessors, (3816), 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) [2023-08-04 03:35:43,496 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 636.0) internal successors, (3816), 6 states have internal predecessors, (3816), 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) [2023-08-04 03:35:43,496 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 164 flow. Second operand 5 states and 1464 transitions. [2023-08-04 03:35:43,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 340 flow [2023-08-04 03:35:43,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 333 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 03:35:43,502 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 174 flow [2023-08-04 03:35:43,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=636, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-04 03:35:43,503 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2023-08-04 03:35:43,503 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 174 flow [2023-08-04 03:35:43,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 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) [2023-08-04 03:35:43,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:43,504 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:35:43,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:35:43,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:35:43,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:35:43,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash -427765566, now seen corresponding path program 1 times [2023-08-04 03:35:43,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:43,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037213974] [2023-08-04 03:35:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:43,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:35:43,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:43,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037213974] [2023-08-04 03:35:43,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037213974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:35:43,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:35:43,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:35:43,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180993027] [2023-08-04 03:35:43,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:35:43,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:35:43,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:35:43,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:35:43,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 636 [2023-08-04 03:35:43,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 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) [2023-08-04 03:35:43,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:43,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 636 [2023-08-04 03:35:43,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:54,914 INFO L124 PetriNetUnfolderBase]: 155904/194337 cut-off events. [2023-08-04 03:35:54,915 INFO L125 PetriNetUnfolderBase]: For 2072/2072 co-relation queries the response was YES. [2023-08-04 03:35:55,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390431 conditions, 194337 events. 155904/194337 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 3393. Compared 1045077 event pairs, 92084 based on Foata normal form. 1/141873 useless extension candidates. Maximal degree in co-relation 390411. Up to 193748 conditions per place. [2023-08-04 03:35:56,027 INFO L140 encePairwiseOnDemand]: 633/636 looper letters, 62 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 03:35:56,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 309 flow [2023-08-04 03:35:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:35:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:35:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-08-04 03:35:56,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2023-08-04 03:35:56,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-08-04 03:35:56,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-08-04 03:35:56,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:56,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-08-04 03:35:56,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 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) [2023-08-04 03:35:56,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 636.0) internal successors, (2544), 4 states have internal predecessors, (2544), 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) [2023-08-04 03:35:56,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 636.0) internal successors, (2544), 4 states have internal predecessors, (2544), 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) [2023-08-04 03:35:56,037 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 174 flow. Second operand 3 states and 900 transitions. [2023-08-04 03:35:56,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 309 flow [2023-08-04 03:35:56,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:35:56,042 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 172 flow [2023-08-04 03:35:56,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=636, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2023-08-04 03:35:56,043 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2023-08-04 03:35:56,043 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 172 flow [2023-08-04 03:35:56,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 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) [2023-08-04 03:35:56,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:56,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:35:56,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 03:35:56,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:35:56,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash -442153190, now seen corresponding path program 1 times [2023-08-04 03:35:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:56,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435536481] [2023-08-04 03:35:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:56,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:35:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:56,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435536481] [2023-08-04 03:35:56,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435536481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:35:56,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311961109] [2023-08-04 03:35:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:56,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:35:56,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:35:56,114 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) [2023-08-04 03:35:56,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:35:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:56,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:35:56,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:35:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:35:56,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:35:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:35:56,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311961109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:35:56,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:35:56,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:35:56,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837929332] [2023-08-04 03:35:56,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:35:56,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:35:56,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:35:56,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:35:56,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 636 [2023-08-04 03:35:56,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 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) [2023-08-04 03:35:56,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:56,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 636 [2023-08-04 03:35:56,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:36:06,178 INFO L124 PetriNetUnfolderBase]: 139786/172746 cut-off events. [2023-08-04 03:36:06,178 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2023-08-04 03:36:06,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347000 conditions, 172746 events. 139786/172746 cut-off events. For 1762/1762 co-relation queries the response was YES. Maximal size of possible extension queue 3058. Compared 892433 event pairs, 53616 based on Foata normal form. 5/124698 useless extension candidates. Maximal degree in co-relation 346979. Up to 172142 conditions per place. [2023-08-04 03:36:07,470 INFO L140 encePairwiseOnDemand]: 633/636 looper letters, 69 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-08-04 03:36:07,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 79 transitions, 341 flow [2023-08-04 03:36:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:36:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:36:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1184 transitions. [2023-08-04 03:36:07,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-08-04 03:36:07,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1184 transitions. [2023-08-04 03:36:07,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1184 transitions. [2023-08-04 03:36:07,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:36:07,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1184 transitions. [2023-08-04 03:36:07,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 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) [2023-08-04 03:36:07,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 636.0) internal successors, (3180), 5 states have internal predecessors, (3180), 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) [2023-08-04 03:36:07,527 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 636.0) internal successors, (3180), 5 states have internal predecessors, (3180), 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) [2023-08-04 03:36:07,527 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 172 flow. Second operand 4 states and 1184 transitions. [2023-08-04 03:36:07,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 79 transitions, 341 flow [2023-08-04 03:36:07,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:36:07,549 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 169 flow [2023-08-04 03:36:07,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=636, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-04 03:36:07,553 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-08-04 03:36:07,553 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 169 flow [2023-08-04 03:36:07,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 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) [2023-08-04 03:36:07,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:36:07,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:36:07,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:36:07,759 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,SelfDestructingSolverStorable5 [2023-08-04 03:36:07,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:36:07,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:36:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash 408197905, now seen corresponding path program 1 times [2023-08-04 03:36:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:36:07,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266204767] [2023-08-04 03:36:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:07,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:36:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:36:07,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:36:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266204767] [2023-08-04 03:36:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266204767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:36:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448941615] [2023-08-04 03:36:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:07,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:36:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:36:07,906 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) [2023-08-04 03:36:07,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:36:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:08,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:36:08,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:36:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:36:08,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:36:08,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448941615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:36:08,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:36:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:36:08,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368322207] [2023-08-04 03:36:08,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:36:08,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:36:08,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:36:08,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:36:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:36:08,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 636 [2023-08-04 03:36:08,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 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) [2023-08-04 03:36:08,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:36:08,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 636 [2023-08-04 03:36:08,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:36:14,413 INFO L124 PetriNetUnfolderBase]: 89438/112382 cut-off events. [2023-08-04 03:36:14,413 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2023-08-04 03:36:14,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225510 conditions, 112382 events. 89438/112382 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 2109. Compared 575988 event pairs, 612 based on Foata normal form. 10260/90833 useless extension candidates. Maximal degree in co-relation 225489. Up to 57882 conditions per place. [2023-08-04 03:36:14,713 INFO L140 encePairwiseOnDemand]: 633/636 looper letters, 0 selfloop transitions, 0 changer transitions 146/146 dead transitions. [2023-08-04 03:36:14,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 146 transitions, 609 flow [2023-08-04 03:36:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:36:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:36:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1529 transitions. [2023-08-04 03:36:14,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808176100628931 [2023-08-04 03:36:14,716 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1529 transitions. [2023-08-04 03:36:14,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1529 transitions. [2023-08-04 03:36:14,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:36:14,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1529 transitions. [2023-08-04 03:36:14,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.8) internal successors, (1529), 5 states have internal predecessors, (1529), 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) [2023-08-04 03:36:14,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 636.0) internal successors, (3816), 6 states have internal predecessors, (3816), 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) [2023-08-04 03:36:14,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 636.0) internal successors, (3816), 6 states have internal predecessors, (3816), 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) [2023-08-04 03:36:14,725 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 169 flow. Second operand 5 states and 1529 transitions. [2023-08-04 03:36:14,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 146 transitions, 609 flow [2023-08-04 03:36:14,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 146 transitions, 602 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:36:14,773 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-08-04 03:36:14,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=636, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-08-04 03:36:14,774 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2023-08-04 03:36:14,774 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-08-04 03:36:14,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 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) [2023-08-04 03:36:14,775 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:36:14,775 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:36:14,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:36:14,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:36:14,980 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 03:36:14,981 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:36:14,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 322 transitions, 692 flow [2023-08-04 03:36:15,130 INFO L124 PetriNetUnfolderBase]: 171/1255 cut-off events. [2023-08-04 03:36:15,131 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:36:15,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1255 events. 171/1255 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7264 event pairs, 2 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 766. Up to 32 conditions per place. [2023-08-04 03:36:15,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 322 transitions, 692 flow [2023-08-04 03:36:15,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 322 transitions, 692 flow [2023-08-04 03:36:15,156 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:36:15,157 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 322 transitions, 692 flow [2023-08-04 03:36:15,157 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 322 transitions, 692 flow [2023-08-04 03:36:15,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 322 transitions, 692 flow [2023-08-04 03:36:15,303 INFO L124 PetriNetUnfolderBase]: 171/1255 cut-off events. [2023-08-04 03:36:15,303 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:36:15,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1255 events. 171/1255 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7264 event pairs, 2 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 766. Up to 32 conditions per place. [2023-08-04 03:36:15,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 41636 [2023-08-04 03:36:20,236 INFO L134 LiptonReduction]: Checked pairs total: 73792 [2023-08-04 03:36:20,237 INFO L136 LiptonReduction]: Total number of compositions: 313 [2023-08-04 03:36:20,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:36:20,239 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=true, 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;@7725471f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:36:20,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:36:20,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:36:20,241 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 03:36:20,241 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:36:20,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:36:20,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 03:36:20,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:36:20,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:36:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1920829664, now seen corresponding path program 1 times [2023-08-04 03:36:20,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:36:20,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761315251] [2023-08-04 03:36:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:36:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:36:20,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:36:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761315251] [2023-08-04 03:36:20,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761315251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:36:20,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:36:20,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:36:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138734577] [2023-08-04 03:36:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:36:20,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:36:20,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:36:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:36:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:36:20,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 635 [2023-08-04 03:36:20,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 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) [2023-08-04 03:36:20,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:36:20,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 635 [2023-08-04 03:36:20,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:36:58,185 INFO L124 PetriNetUnfolderBase]: 538024/669459 cut-off events. [2023-08-04 03:36:58,185 INFO L125 PetriNetUnfolderBase]: For 39448/39448 co-relation queries the response was YES. [2023-08-04 03:36:59,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352180 conditions, 669459 events. 538024/669459 cut-off events. For 39448/39448 co-relation queries the response was YES. Maximal size of possible extension queue 10918. Compared 3984677 event pairs, 331172 based on Foata normal form. 37657/493983 useless extension candidates. Maximal degree in co-relation 444836. Up to 667113 conditions per place. [2023-08-04 03:37:01,820 INFO L140 encePairwiseOnDemand]: 624/635 looper letters, 75 selfloop transitions, 2 changer transitions 2/87 dead transitions. [2023-08-04 03:37:01,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 376 flow [2023-08-04 03:37:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:37:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:37:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 923 transitions. [2023-08-04 03:37:01,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48451443569553804 [2023-08-04 03:37:01,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 923 transitions. [2023-08-04 03:37:01,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 923 transitions. [2023-08-04 03:37:01,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:01,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 923 transitions. [2023-08-04 03:37:01,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 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) [2023-08-04 03:37:01,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:37:01,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:37:01,829 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 226 flow. Second operand 3 states and 923 transitions. [2023-08-04 03:37:01,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 376 flow [2023-08-04 03:37:01,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:37:01,841 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 210 flow [2023-08-04 03:37:01,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-08-04 03:37:01,842 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 03:37:01,842 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 210 flow [2023-08-04 03:37:01,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 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) [2023-08-04 03:37:01,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:01,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:37:01,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 03:37:01,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:37:01,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:01,843 INFO L85 PathProgramCache]: Analyzing trace with hash 73391383, now seen corresponding path program 1 times [2023-08-04 03:37:01,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:01,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036878432] [2023-08-04 03:37:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:01,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:37:01,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:01,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036878432] [2023-08-04 03:37:01,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036878432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:37:01,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946883470] [2023-08-04 03:37:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:01,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:37:01,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:37:01,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:37:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:01,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:37:01,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:37:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:37:01,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:37:01,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946883470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:37:01,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:37:01,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:37:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852423663] [2023-08-04 03:37:01,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:37:01,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:37:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:37:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:37:01,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 635 [2023-08-04 03:37:01,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:01,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:01,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 635 [2023-08-04 03:37:01,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:46,668 INFO L124 PetriNetUnfolderBase]: 535415/669490 cut-off events. [2023-08-04 03:37:46,669 INFO L125 PetriNetUnfolderBase]: For 34463/34463 co-relation queries the response was YES. [2023-08-04 03:37:48,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348834 conditions, 669490 events. 535415/669490 cut-off events. For 34463/34463 co-relation queries the response was YES. Maximal size of possible extension queue 11128. Compared 4078964 event pairs, 285412 based on Foata normal form. 0/457165 useless extension candidates. Maximal degree in co-relation 723736. Up to 661654 conditions per place. [2023-08-04 03:37:50,517 INFO L140 encePairwiseOnDemand]: 632/635 looper letters, 99 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2023-08-04 03:37:50,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 470 flow [2023-08-04 03:37:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:37:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:37:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 938 transitions. [2023-08-04 03:37:50,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923884514435696 [2023-08-04 03:37:50,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 938 transitions. [2023-08-04 03:37:50,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 938 transitions. [2023-08-04 03:37:50,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:50,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 938 transitions. [2023-08-04 03:37:50,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 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) [2023-08-04 03:37:50,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:37:50,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:37:50,525 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 210 flow. Second operand 3 states and 938 transitions. [2023-08-04 03:37:50,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 470 flow [2023-08-04 03:37:50,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 109 transitions, 462 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:37:50,608 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 214 flow [2023-08-04 03:37:50,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2023-08-04 03:37:50,609 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-04 03:37:50,609 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 214 flow [2023-08-04 03:37:50,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:50,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:50,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:37:50,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:37:50,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:50,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:37:50,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1212563381, now seen corresponding path program 1 times [2023-08-04 03:37:50,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:50,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747308653] [2023-08-04 03:37:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:37:50,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:50,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747308653] [2023-08-04 03:37:50,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747308653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:37:50,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796044104] [2023-08-04 03:37:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:50,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:50,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:37:50,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:37:50,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:37:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:50,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:37:50,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:37:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:37:50,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:37:50,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796044104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:37:50,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:37:50,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:37:50,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085936779] [2023-08-04 03:37:50,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:37:50,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:37:50,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:50,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:37:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:37:50,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 635 [2023-08-04 03:37:50,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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) [2023-08-04 03:37:50,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:50,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 635 [2023-08-04 03:37:50,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:38:18,934 INFO L124 PetriNetUnfolderBase]: 387726/493880 cut-off events. [2023-08-04 03:38:18,934 INFO L125 PetriNetUnfolderBase]: For 35024/35024 co-relation queries the response was YES. [2023-08-04 03:38:20,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016828 conditions, 493880 events. 387726/493880 cut-off events. For 35024/35024 co-relation queries the response was YES. Maximal size of possible extension queue 8512. Compared 3147149 event pairs, 190364 based on Foata normal form. 0/360271 useless extension candidates. Maximal degree in co-relation 329587. Up to 324806 conditions per place. [2023-08-04 03:38:21,622 INFO L140 encePairwiseOnDemand]: 632/635 looper letters, 121 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-08-04 03:38:21,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 131 transitions, 570 flow [2023-08-04 03:38:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:38:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:38:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-08-04 03:38:21,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034120734908136 [2023-08-04 03:38:21,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-08-04 03:38:21,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-08-04 03:38:21,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:38:21,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-08-04 03:38:21,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 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) [2023-08-04 03:38:21,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:38:21,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:38:21,630 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 214 flow. Second operand 3 states and 959 transitions. [2023-08-04 03:38:21,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 131 transitions, 570 flow [2023-08-04 03:38:21,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 131 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:38:21,677 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 224 flow [2023-08-04 03:38:21,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2023-08-04 03:38:21,678 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 03:38:21,678 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 224 flow [2023-08-04 03:38:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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) [2023-08-04 03:38:21,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:21,679 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] [2023-08-04 03:38:21,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:38:21,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 03:38:21,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:38:21,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:21,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1756299404, now seen corresponding path program 1 times [2023-08-04 03:38:21,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:21,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687366664] [2023-08-04 03:38:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:21,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:38:21,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:38:21,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687366664] [2023-08-04 03:38:21,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687366664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:38:21,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776771056] [2023-08-04 03:38:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:21,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:38:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:38:21,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:38:21,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:38:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:22,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:38:22,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:38:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:38:22,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:38:22,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776771056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:38:22,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:38:22,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:38:22,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86750284] [2023-08-04 03:38:22,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:38:22,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:38:22,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:38:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:38:22,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:38:22,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 635 [2023-08-04 03:38:22,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 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) [2023-08-04 03:38:22,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:38:22,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 635 [2023-08-04 03:38:22,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:38:50,717 INFO L124 PetriNetUnfolderBase]: 373825/472462 cut-off events. [2023-08-04 03:38:50,718 INFO L125 PetriNetUnfolderBase]: For 115163/115163 co-relation queries the response was YES. [2023-08-04 03:38:51,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008133 conditions, 472462 events. 373825/472462 cut-off events. For 115163/115163 co-relation queries the response was YES. Maximal size of possible extension queue 8151. Compared 2890330 event pairs, 249722 based on Foata normal form. 0/353421 useless extension candidates. Maximal degree in co-relation 402215. Up to 417100 conditions per place. [2023-08-04 03:38:53,114 INFO L140 encePairwiseOnDemand]: 632/635 looper letters, 122 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2023-08-04 03:38:53,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 132 transitions, 582 flow [2023-08-04 03:38:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:38:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:38:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-08-04 03:38:53,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034120734908136 [2023-08-04 03:38:53,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-08-04 03:38:53,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-08-04 03:38:53,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:38:53,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-08-04 03:38:53,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 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) [2023-08-04 03:38:53,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:38:53,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:38:53,121 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 224 flow. Second operand 3 states and 959 transitions. [2023-08-04 03:38:53,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 132 transitions, 582 flow [2023-08-04 03:38:54,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 132 transitions, 580 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:38:54,462 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 234 flow [2023-08-04 03:38:54,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2023-08-04 03:38:54,463 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2023-08-04 03:38:54,463 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 234 flow [2023-08-04 03:38:54,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 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) [2023-08-04 03:38:54,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:54,464 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] [2023-08-04 03:38:54,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 03:38:54,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:38:54,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:38:54,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1898686517, now seen corresponding path program 1 times [2023-08-04 03:38:54,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:54,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094943287] [2023-08-04 03:38:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:54,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:38:54,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:38:54,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094943287] [2023-08-04 03:38:54,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094943287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:38:54,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745880939] [2023-08-04 03:38:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:54,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:38:54,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:38:54,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:38:54,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:38:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:54,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 03:38:54,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:38:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:38:54,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:38:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745880939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:38:54,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:38:54,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:38:54,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788461529] [2023-08-04 03:38:54,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:38:54,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:38:54,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:38:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:38:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:38:55,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 635 [2023-08-04 03:38:55,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 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) [2023-08-04 03:38:55,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:38:55,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 635 [2023-08-04 03:38:55,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:39:23,166 INFO L124 PetriNetUnfolderBase]: 373825/472307 cut-off events. [2023-08-04 03:39:23,166 INFO L125 PetriNetUnfolderBase]: For 103209/103209 co-relation queries the response was YES. [2023-08-04 03:39:24,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010646 conditions, 472307 events. 373825/472307 cut-off events. For 103209/103209 co-relation queries the response was YES. Maximal size of possible extension queue 8151. Compared 2869517 event pairs, 280261 based on Foata normal form. 1/354088 useless extension candidates. Maximal degree in co-relation 872805. Up to 469545 conditions per place. [2023-08-04 03:39:25,608 INFO L140 encePairwiseOnDemand]: 632/635 looper letters, 74 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 03:39:25,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 388 flow [2023-08-04 03:39:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:39:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:39:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-08-04 03:39:25,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776902887139108 [2023-08-04 03:39:25,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-08-04 03:39:25,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-08-04 03:39:25,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:39:25,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-08-04 03:39:25,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 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) [2023-08-04 03:39:25,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:39:25,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 635.0) internal successors, (2540), 4 states have internal predecessors, (2540), 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) [2023-08-04 03:39:25,615 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 234 flow. Second operand 3 states and 910 transitions. [2023-08-04 03:39:25,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 388 flow [2023-08-04 03:39:27,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:39:27,935 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 244 flow [2023-08-04 03:39:27,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-04 03:39:27,936 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-08-04 03:39:27,936 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 244 flow [2023-08-04 03:39:27,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 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) [2023-08-04 03:39:27,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:39:27,936 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] [2023-08-04 03:39:27,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 03:39:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:39:28,142 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:39:28,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:39:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1923197344, now seen corresponding path program 1 times [2023-08-04 03:39:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:39:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821624193] [2023-08-04 03:39:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:39:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:39:28,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:39:28,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821624193] [2023-08-04 03:39:28,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821624193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:39:28,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971718312] [2023-08-04 03:39:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:28,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:39:28,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:39:28,199 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:39:28,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:39:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:28,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:39:28,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:39:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:39:28,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:39:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:39:28,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971718312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:39:28,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:39:28,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:39:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954334285] [2023-08-04 03:39:28,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:39:28,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:39:28,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:39:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:39:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:39:28,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 635 [2023-08-04 03:39:28,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 283.2) internal successors, (1416), 5 states have internal predecessors, (1416), 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) [2023-08-04 03:39:28,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:39:28,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 635 [2023-08-04 03:39:28,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:39:55,257 INFO L124 PetriNetUnfolderBase]: 344192/432537 cut-off events. [2023-08-04 03:39:55,257 INFO L125 PetriNetUnfolderBase]: For 80797/80797 co-relation queries the response was YES. [2023-08-04 03:39:56,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924316 conditions, 432537 events. 344192/432537 cut-off events. For 80797/80797 co-relation queries the response was YES. Maximal size of possible extension queue 7522. Compared 2559820 event pairs, 150850 based on Foata normal form. 5/321842 useless extension candidates. Maximal degree in co-relation 924297. Up to 430232 conditions per place. [2023-08-04 03:39:57,756 INFO L140 encePairwiseOnDemand]: 631/635 looper letters, 87 selfloop transitions, 3 changer transitions 1/99 dead transitions. [2023-08-04 03:39:57,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 456 flow [2023-08-04 03:39:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:39:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:39:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1200 transitions. [2023-08-04 03:39:57,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47244094488188976 [2023-08-04 03:39:57,759 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1200 transitions. [2023-08-04 03:39:57,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1200 transitions. [2023-08-04 03:39:57,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:39:57,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1200 transitions. [2023-08-04 03:39:57,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 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) [2023-08-04 03:39:57,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 635.0) internal successors, (3175), 5 states have internal predecessors, (3175), 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) [2023-08-04 03:39:57,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 635.0) internal successors, (3175), 5 states have internal predecessors, (3175), 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) [2023-08-04 03:39:57,764 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 244 flow. Second operand 4 states and 1200 transitions. [2023-08-04 03:39:57,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 456 flow [2023-08-04 03:39:59,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 452 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:39:59,219 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 254 flow [2023-08-04 03:39:59,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-04 03:39:59,220 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2023-08-04 03:39:59,220 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 254 flow [2023-08-04 03:39:59,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 283.2) internal successors, (1416), 5 states have internal predecessors, (1416), 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) [2023-08-04 03:39:59,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:39:59,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2023-08-04 03:39:59,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:39:59,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 03:39:59,422 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:39:59,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:39:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1381552370, now seen corresponding path program 1 times [2023-08-04 03:39:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:39:59,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163617404] [2023-08-04 03:39:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:59,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:39:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:39:59,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:39:59,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163617404] [2023-08-04 03:39:59,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163617404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:39:59,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954385993] [2023-08-04 03:39:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:59,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:39:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:39:59,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:39:59,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:39:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:59,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:39:59,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:39:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:39:59,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:39:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:39:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954385993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:39:59,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:39:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:39:59,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808269053] [2023-08-04 03:39:59,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:39:59,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:39:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:39:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:39:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:39:59,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 635 [2023-08-04 03:39:59,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 283.2) internal successors, (1416), 5 states have internal predecessors, (1416), 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) [2023-08-04 03:39:59,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:39:59,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 635 [2023-08-04 03:39:59,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:40:24,845 INFO L124 PetriNetUnfolderBase]: 336970/428843 cut-off events. [2023-08-04 03:40:24,845 INFO L125 PetriNetUnfolderBase]: For 35016/35016 co-relation queries the response was YES. [2023-08-04 03:40:25,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909678 conditions, 428843 events. 336970/428843 cut-off events. For 35016/35016 co-relation queries the response was YES. Maximal size of possible extension queue 7716. Compared 2674485 event pairs, 91977 based on Foata normal form. 570/321536 useless extension candidates. Maximal degree in co-relation 909651. Up to 309832 conditions per place. [2023-08-04 03:40:27,229 INFO L140 encePairwiseOnDemand]: 631/635 looper letters, 145 selfloop transitions, 3 changer transitions 1/157 dead transitions. [2023-08-04 03:40:27,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 157 transitions, 698 flow [2023-08-04 03:40:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:40:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:40:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1258 transitions. [2023-08-04 03:40:27,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4952755905511811 [2023-08-04 03:40:27,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1258 transitions. [2023-08-04 03:40:27,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1258 transitions. [2023-08-04 03:40:27,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:40:27,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1258 transitions. [2023-08-04 03:40:27,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.5) internal successors, (1258), 4 states have internal predecessors, (1258), 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) [2023-08-04 03:40:27,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 635.0) internal successors, (3175), 5 states have internal predecessors, (3175), 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) [2023-08-04 03:40:27,236 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 635.0) internal successors, (3175), 5 states have internal predecessors, (3175), 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) [2023-08-04 03:40:27,237 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 254 flow. Second operand 4 states and 1258 transitions. [2023-08-04 03:40:27,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 157 transitions, 698 flow [2023-08-04 03:40:49,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 157 transitions, 689 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:40:49,723 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 259 flow [2023-08-04 03:40:49,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=635, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2023-08-04 03:40:49,723 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2023-08-04 03:40:49,723 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 259 flow [2023-08-04 03:40:49,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 283.2) internal successors, (1416), 5 states have internal predecessors, (1416), 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) [2023-08-04 03:40:49,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:40:49,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:40:49,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:40:49,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 03:40:49,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:40:49,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:40:49,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2025731647, now seen corresponding path program 1 times [2023-08-04 03:40:49,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:40:49,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742965970] [2023-08-04 03:40:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:49,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:40:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:40:49,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:40:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742965970] [2023-08-04 03:40:49,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742965970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:40:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303795097] [2023-08-04 03:40:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:49,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:40:49,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:40:49,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:40:49,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:40:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:50,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:40:50,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:40:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:40:50,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:40:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:40:50,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303795097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:40:50,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:40:50,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:40:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132724282] [2023-08-04 03:40:50,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:40:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:40:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:40:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:40:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:40:50,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 635 [2023-08-04 03:40:50,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 283.4) internal successors, (1417), 5 states have internal predecessors, (1417), 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) [2023-08-04 03:40:50,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:40:50,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 635 [2023-08-04 03:40:50,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand