/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-4.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:34:15,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:34:15,373 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:34:15,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:34:15,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:34:15,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:34:15,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:34:15,397 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:34:15,397 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:34:15,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:34:15,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:34:15,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:34:15,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:34:15,402 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:34:15,402 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:34:15,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:34:15,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:34:15,402 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:34:15,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:34:15,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:34:15,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:34:15,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:34:15,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:34:15,404 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:34:15,404 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:34:15,404 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:34:15,404 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:34:15,405 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:34:15,405 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:34:15,405 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:34:15,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:34:15,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:34:15,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:34:15,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:34:15,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:34:15,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:34:15,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:34:15,407 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:34:15,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:34:15,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:34:15,407 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:34:15,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:34:15,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:34:15,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:34:15,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:34:15,639 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:34:15,639 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:34:15,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c [2023-08-04 03:34:16,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:34:16,839 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:34:16,839 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-4.wvr_bound2.c [2023-08-04 03:34:16,845 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/700e06fad/1c0c05d478c042d582c2aef176a863fd/FLAGf57ddb1af [2023-08-04 03:34:16,854 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/700e06fad/1c0c05d478c042d582c2aef176a863fd [2023-08-04 03:34:16,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:34:16,857 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:34:16,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:34:16,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:34:16,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:34:16,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:34:16" (1/1) ... [2023-08-04 03:34:16,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc8afab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:16, skipping insertion in model container [2023-08-04 03:34:16,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:34:16" (1/1) ... [2023-08-04 03:34:16,877 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:34:16,985 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-4.wvr_bound2.c[2734,2747] [2023-08-04 03:34:16,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:34:16,996 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:34:17,011 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-4.wvr_bound2.c[2734,2747] [2023-08-04 03:34:17,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:34:17,023 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:34:17,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17 WrapperNode [2023-08-04 03:34:17,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:34:17,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:34:17,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:34:17,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:34:17,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,036 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,052 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 189 [2023-08-04 03:34:17,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:34:17,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:34:17,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:34:17,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:34:17,059 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,061 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,071 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:34:17,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:34:17,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:34:17,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:34:17,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (1/1) ... [2023-08-04 03:34:17,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:34:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:34:17,106 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 03:34:17,108 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 03:34:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:34:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:34:17,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:34:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:34:17,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:34:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:34:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:34:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:34:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:34:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:34:17,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:34:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:34:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:34:17,140 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 03:34:17,215 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:34:17,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:34:17,466 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:34:17,474 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:34:17,474 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 03:34:17,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:34:17 BoogieIcfgContainer [2023-08-04 03:34:17,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:34:17,478 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:34:17,478 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:34:17,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:34:17,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:34:16" (1/3) ... [2023-08-04 03:34:17,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcbea50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:34:17, skipping insertion in model container [2023-08-04 03:34:17,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:34:17" (2/3) ... [2023-08-04 03:34:17,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcbea50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:34:17, skipping insertion in model container [2023-08-04 03:34:17,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:34:17" (3/3) ... [2023-08-04 03:34:17,483 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-4.wvr_bound2.c [2023-08-04 03:34:17,490 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:34:17,498 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:34:17,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:34:17,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:34:17,555 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:34:17,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 03:34:17,669 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-04 03:34:17,670 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:34:17,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-04 03:34:17,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 03:34:17,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 213 transitions, 448 flow [2023-08-04 03:34:17,710 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:34:17,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-04 03:34:17,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 213 transitions, 448 flow [2023-08-04 03:34:17,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 213 transitions, 448 flow [2023-08-04 03:34:17,767 INFO L124 PetriNetUnfolderBase]: 47/401 cut-off events. [2023-08-04 03:34:17,767 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:34:17,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 401 events. 47/401 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1299 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2023-08-04 03:34:17,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 10128 [2023-08-04 03:34:21,520 INFO L134 LiptonReduction]: Checked pairs total: 13811 [2023-08-04 03:34:21,521 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-04 03:34:21,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:34:21,553 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;@2faa05e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:34:21,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:34:21,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:34:21,557 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-08-04 03:34:21,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:34:21,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:21,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:34:21,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:34:21,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1864065581, now seen corresponding path program 1 times [2023-08-04 03:34:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:21,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716216032] [2023-08-04 03:34:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:21,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:21,782 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 03:34:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716216032] [2023-08-04 03:34:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716216032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:34:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:34:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:34:21,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130424512] [2023-08-04 03:34:21,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:34:21,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:34:21,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:34:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:34:21,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 435 [2023-08-04 03:34:21,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 03:34:21,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:21,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 435 [2023-08-04 03:34:21,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:34:22,030 INFO L124 PetriNetUnfolderBase]: 894/1413 cut-off events. [2023-08-04 03:34:22,031 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-08-04 03:34:22,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 1413 events. 894/1413 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6549 event pairs, 598 based on Foata normal form. 0/974 useless extension candidates. Maximal degree in co-relation 2312. Up to 1370 conditions per place. [2023-08-04 03:34:22,037 INFO L140 encePairwiseOnDemand]: 430/435 looper letters, 21 selfloop transitions, 2 changer transitions 13/40 dead transitions. [2023-08-04 03:34:22,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 40 transitions, 170 flow [2023-08-04 03:34:22,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:34:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:34:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-04 03:34:22,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453639846743295 [2023-08-04 03:34:22,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-04 03:34:22,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-04 03:34:22,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:34:22,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-04 03:34:22,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 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 03:34:22,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 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 03:34:22,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 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 03:34:22,066 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 104 flow. Second operand 3 states and 592 transitions. [2023-08-04 03:34:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 40 transitions, 170 flow [2023-08-04 03:34:22,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:34:22,071 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 74 flow [2023-08-04 03:34:22,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2023-08-04 03:34:22,075 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-04 03:34:22,075 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 74 flow [2023-08-04 03:34:22,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 03:34:22,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:22,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:34:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:34:22,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:34:22,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1627013295, now seen corresponding path program 1 times [2023-08-04 03:34:22,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:22,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327241045] [2023-08-04 03:34:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:22,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:34:22,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:34:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:34:22,167 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:34:22,167 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:34:22,168 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:34:22,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:34:22,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:34:22,173 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:34:22,176 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:34:22,176 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:34:22,176 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:34:22,203 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:34:22,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 03:34:22,344 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-04 03:34:22,344 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:34:22,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-04 03:34:22,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 03:34:22,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 296 transitions, 640 flow [2023-08-04 03:34:22,364 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:34:22,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-04 03:34:22,365 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-04 03:34:22,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 03:34:22,489 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-04 03:34:22,489 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:34:22,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-04 03:34:22,531 INFO L119 LiptonReduction]: Number of co-enabled transitions 33576 [2023-08-04 03:34:26,644 INFO L134 LiptonReduction]: Checked pairs total: 62008 [2023-08-04 03:34:26,644 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-08-04 03:34:26,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:34:26,646 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;@2faa05e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:34:26,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:34:26,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:34:26,651 INFO L124 PetriNetUnfolderBase]: 8/89 cut-off events. [2023-08-04 03:34:26,651 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:34:26,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:26,651 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:34:26,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:34:26,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash 168513799, now seen corresponding path program 1 times [2023-08-04 03:34:26,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:26,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737036850] [2023-08-04 03:34:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:26,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:26,762 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 03:34:26,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:26,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737036850] [2023-08-04 03:34:26,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737036850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:34:26,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:34:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:34:26,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784109998] [2023-08-04 03:34:26,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:34:26,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:34:26,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:34:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:34:26,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 576 [2023-08-04 03:34:26,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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 03:34:26,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:26,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 576 [2023-08-04 03:34:26,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:34:53,070 INFO L124 PetriNetUnfolderBase]: 336900/420958 cut-off events. [2023-08-04 03:34:53,070 INFO L125 PetriNetUnfolderBase]: For 26253/26253 co-relation queries the response was YES. [2023-08-04 03:34:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848895 conditions, 420958 events. 336900/420958 cut-off events. For 26253/26253 co-relation queries the response was YES. Maximal size of possible extension queue 8679. Compared 2505745 event pairs, 239746 based on Foata normal form. 27390/302937 useless extension candidates. Maximal degree in co-relation 272509. Up to 417342 conditions per place. [2023-08-04 03:34:54,486 INFO L140 encePairwiseOnDemand]: 568/576 looper letters, 48 selfloop transitions, 2 changer transitions 17/76 dead transitions. [2023-08-04 03:34:54,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 330 flow [2023-08-04 03:34:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:34:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:34:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 830 transitions. [2023-08-04 03:34:54,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48032407407407407 [2023-08-04 03:34:54,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 830 transitions. [2023-08-04 03:34:54,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 830 transitions. [2023-08-04 03:34:54,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:34:54,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 830 transitions. [2023-08-04 03:34:54,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 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 03:34:54,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 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 03:34:54,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 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 03:34:54,494 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 208 flow. Second operand 3 states and 830 transitions. [2023-08-04 03:34:54,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 330 flow [2023-08-04 03:34:54,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:34:54,501 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 152 flow [2023-08-04 03:34:54,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2023-08-04 03:34:54,502 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-08-04 03:34:54,502 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 152 flow [2023-08-04 03:34:54,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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 03:34:54,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:54,503 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:34:54,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:34:54,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:34:54,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash 74675617, now seen corresponding path program 1 times [2023-08-04 03:34:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:54,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820711453] [2023-08-04 03:34:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:54,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:54,545 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 03:34:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820711453] [2023-08-04 03:34:54,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820711453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:34:54,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120291900] [2023-08-04 03:34:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:54,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:34:54,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:34:54,567 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 03:34:54,568 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 03:34:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:54,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:34:54,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:34:54,677 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 03:34:54,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:34:54,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120291900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:34:54,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:34:54,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:34:54,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909215775] [2023-08-04 03:34:54,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:34:54,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:34:54,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:54,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:34:54,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:34:54,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-04 03:34:54,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 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 03:34:54,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:54,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-04 03:34:54,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:01,092 INFO L124 PetriNetUnfolderBase]: 97144/121389 cut-off events. [2023-08-04 03:35:01,092 INFO L125 PetriNetUnfolderBase]: For 1418/1418 co-relation queries the response was YES. [2023-08-04 03:35:01,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244155 conditions, 121389 events. 97144/121389 cut-off events. For 1418/1418 co-relation queries the response was YES. Maximal size of possible extension queue 2527. Compared 651044 event pairs, 38507 based on Foata normal form. 0/85135 useless extension candidates. Maximal degree in co-relation 244140. Up to 120831 conditions per place. [2023-08-04 03:35:01,717 INFO L140 encePairwiseOnDemand]: 572/576 looper letters, 61 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-04 03:35:01,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 310 flow [2023-08-04 03:35:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:35:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:35:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1336 transitions. [2023-08-04 03:35:01,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2023-08-04 03:35:01,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1336 transitions. [2023-08-04 03:35:01,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1336 transitions. [2023-08-04 03:35:01,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:01,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1336 transitions. [2023-08-04 03:35:01,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.2) internal successors, (1336), 5 states have internal predecessors, (1336), 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 03:35:01,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 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 03:35:01,728 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 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 03:35:01,728 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 152 flow. Second operand 5 states and 1336 transitions. [2023-08-04 03:35:01,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 310 flow [2023-08-04 03:35:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 303 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 03:35:01,732 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 162 flow [2023-08-04 03:35:01,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-04 03:35:01,733 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2023-08-04 03:35:01,733 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 162 flow [2023-08-04 03:35:01,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 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 03:35:01,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:01,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:35:01,746 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 03:35:01,939 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 03:35:01,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:35:01,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash -810020447, now seen corresponding path program 1 times [2023-08-04 03:35:01,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:01,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913419305] [2023-08-04 03:35:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:01,975 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 03:35:01,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:01,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913419305] [2023-08-04 03:35:01,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913419305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:35:01,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:35:01,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:35:01,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695261288] [2023-08-04 03:35:01,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:35:01,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:35:01,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:35:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:35:01,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 576 [2023-08-04 03:35:01,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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 03:35:01,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:01,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 576 [2023-08-04 03:35:01,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:09,687 INFO L124 PetriNetUnfolderBase]: 95606/119118 cut-off events. [2023-08-04 03:35:09,687 INFO L125 PetriNetUnfolderBase]: For 1297/1297 co-relation queries the response was YES. [2023-08-04 03:35:09,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239449 conditions, 119118 events. 95606/119118 cut-off events. For 1297/1297 co-relation queries the response was YES. Maximal size of possible extension queue 2509. Compared 627731 event pairs, 54151 based on Foata normal form. 1/83324 useless extension candidates. Maximal degree in co-relation 239429. Up to 118585 conditions per place. [2023-08-04 03:35:10,348 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 55 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 03:35:10,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 65 transitions, 283 flow [2023-08-04 03:35:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:35:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:35:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 821 transitions. [2023-08-04 03:35:10,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47511574074074076 [2023-08-04 03:35:10,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 821 transitions. [2023-08-04 03:35:10,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 821 transitions. [2023-08-04 03:35:10,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:10,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 821 transitions. [2023-08-04 03:35:10,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 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 03:35:10,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 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 03:35:10,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 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 03:35:10,357 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 162 flow. Second operand 3 states and 821 transitions. [2023-08-04 03:35:10,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 65 transitions, 283 flow [2023-08-04 03:35:10,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:35:10,359 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 160 flow [2023-08-04 03:35:10,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-04 03:35:10,360 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2023-08-04 03:35:10,360 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 160 flow [2023-08-04 03:35:10,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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 03:35:10,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:10,361 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:35:10,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 03:35:10,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:35:10,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash 272175640, now seen corresponding path program 1 times [2023-08-04 03:35:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:10,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920116365] [2023-08-04 03:35:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:10,398 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 03:35:10,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:10,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920116365] [2023-08-04 03:35:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920116365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:35:10,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538737325] [2023-08-04 03:35:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:10,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:35:10,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:35:10,400 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 03:35:10,446 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 03:35:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:10,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:35:10,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:35:10,511 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 03:35:10,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:35:10,531 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 03:35:10,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538737325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:35:10,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:35:10,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:35:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728784267] [2023-08-04 03:35:10,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:35:10,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:35:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:35:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:35:10,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-04 03:35:10,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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 03:35:10,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:10,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-04 03:35:10,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:16,707 INFO L124 PetriNetUnfolderBase]: 84142/103745 cut-off events. [2023-08-04 03:35:16,708 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-04 03:35:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208516 conditions, 103745 events. 84142/103745 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 2235. Compared 518804 event pairs, 31611 based on Foata normal form. 5/71373 useless extension candidates. Maximal degree in co-relation 208495. Up to 103225 conditions per place. [2023-08-04 03:35:17,288 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 61 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-04 03:35:17,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 311 flow [2023-08-04 03:35:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:35:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:35:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1080 transitions. [2023-08-04 03:35:17,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-04 03:35:17,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1080 transitions. [2023-08-04 03:35:17,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1080 transitions. [2023-08-04 03:35:17,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:17,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1080 transitions. [2023-08-04 03:35:17,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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 03:35:17,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 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 03:35:17,326 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 576.0) internal successors, (2880), 5 states have internal predecessors, (2880), 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 03:35:17,326 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 160 flow. Second operand 4 states and 1080 transitions. [2023-08-04 03:35:17,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 311 flow [2023-08-04 03:35:17,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:35:17,328 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 157 flow [2023-08-04 03:35:17,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-08-04 03:35:17,329 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2023-08-04 03:35:17,329 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 157 flow [2023-08-04 03:35:17,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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 03:35:17,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:17,330 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:35:17,339 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 03:35:17,539 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 03:35:17,539 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:35:17,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash 279234734, now seen corresponding path program 1 times [2023-08-04 03:35:17,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:17,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210254866] [2023-08-04 03:35:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:17,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:17,611 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 03:35:17,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210254866] [2023-08-04 03:35:17,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210254866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:35:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468943874] [2023-08-04 03:35:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:17,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:35:17,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:35:17,613 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 03:35:17,616 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 03:35:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:17,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:35:17,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:35:17,701 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 03:35:17,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:35:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468943874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:35:17,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:35:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:35:17,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668214752] [2023-08-04 03:35:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:35:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:35:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:35:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:35:17,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 576 [2023-08-04 03:35:17,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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 03:35:17,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:17,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 576 [2023-08-04 03:35:17,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:21,464 INFO L124 PetriNetUnfolderBase]: 53992/67725 cut-off events. [2023-08-04 03:35:21,465 INFO L125 PetriNetUnfolderBase]: For 618/618 co-relation queries the response was YES. [2023-08-04 03:35:21,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135992 conditions, 67725 events. 53992/67725 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 1557. Compared 335008 event pairs, 434 based on Foata normal form. 6000/52222 useless extension candidates. Maximal degree in co-relation 135971. Up to 34375 conditions per place. [2023-08-04 03:35:21,682 INFO L140 encePairwiseOnDemand]: 573/576 looper letters, 0 selfloop transitions, 0 changer transitions 128/128 dead transitions. [2023-08-04 03:35:21,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 128 transitions, 535 flow [2023-08-04 03:35:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:35:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:35:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1390 transitions. [2023-08-04 03:35:21,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2023-08-04 03:35:21,689 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1390 transitions. [2023-08-04 03:35:21,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1390 transitions. [2023-08-04 03:35:21,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:21,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1390 transitions. [2023-08-04 03:35:21,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 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 03:35:21,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 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 03:35:21,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 576.0) internal successors, (3456), 6 states have internal predecessors, (3456), 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 03:35:21,695 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 157 flow. Second operand 5 states and 1390 transitions. [2023-08-04 03:35:21,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 128 transitions, 535 flow [2023-08-04 03:35:21,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 128 transitions, 528 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:35:21,718 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 03:35:21,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-04 03:35:21,720 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2023-08-04 03:35:21,721 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 03:35:21,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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 03:35:21,721 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:35:21,721 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:35:21,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 03:35:21,926 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 03:35:21,926 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 03:35:21,926 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:35:21,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 03:35:22,305 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-04 03:35:22,306 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:35:22,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-04 03:35:22,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 03:35:22,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 296 transitions, 640 flow [2023-08-04 03:35:22,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:35:22,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-04 03:35:22,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 296 transitions, 640 flow [2023-08-04 03:35:22,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 296 transitions, 640 flow [2023-08-04 03:35:22,417 INFO L124 PetriNetUnfolderBase]: 165/1177 cut-off events. [2023-08-04 03:35:22,417 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:35:22,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 1177 events. 165/1177 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6750 event pairs, 2 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-08-04 03:35:22,455 INFO L119 LiptonReduction]: Number of co-enabled transitions 33576 [2023-08-04 03:35:26,482 INFO L134 LiptonReduction]: Checked pairs total: 63046 [2023-08-04 03:35:26,482 INFO L136 LiptonReduction]: Total number of compositions: 283 [2023-08-04 03:35:26,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:35:26,484 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;@2faa05e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:35:26,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:35:26,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:35:26,485 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 03:35:26,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:35:26,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:26,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 03:35:26,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:35:26,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1691156775, now seen corresponding path program 1 times [2023-08-04 03:35:26,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:26,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940639014] [2023-08-04 03:35:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:26,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:26,513 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 03:35:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940639014] [2023-08-04 03:35:26,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940639014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:35:26,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:35:26,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:35:26,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975086859] [2023-08-04 03:35:26,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:35:26,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:35:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:26,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:35:26,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:35:26,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 579 [2023-08-04 03:35:26,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 83 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 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 03:35:26,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:26,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 579 [2023-08-04 03:35:26,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:35:53,375 INFO L124 PetriNetUnfolderBase]: 404702/500431 cut-off events. [2023-08-04 03:35:53,375 INFO L125 PetriNetUnfolderBase]: For 28851/28851 co-relation queries the response was YES. [2023-08-04 03:35:54,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010376 conditions, 500431 events. 404702/500431 cut-off events. For 28851/28851 co-relation queries the response was YES. Maximal size of possible extension queue 10177. Compared 2946210 event pairs, 228627 based on Foata normal form. 45479/354280 useless extension candidates. Maximal degree in co-relation 294559. Up to 497898 conditions per place. [2023-08-04 03:35:56,248 INFO L140 encePairwiseOnDemand]: 569/579 looper letters, 70 selfloop transitions, 2 changer transitions 2/83 dead transitions. [2023-08-04 03:35:56,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 358 flow [2023-08-04 03:35:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:35:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:35:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 846 transitions. [2023-08-04 03:35:56,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48704663212435234 [2023-08-04 03:35:56,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 846 transitions. [2023-08-04 03:35:56,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 846 transitions. [2023-08-04 03:35:56,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:35:56,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 846 transitions. [2023-08-04 03:35:56,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 03:35:56,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:35:56,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:35:56,269 INFO L175 Difference]: Start difference. First operand has 73 places, 83 transitions, 214 flow. Second operand 3 states and 846 transitions. [2023-08-04 03:35:56,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 358 flow [2023-08-04 03:35:56,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:35:56,293 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 200 flow [2023-08-04 03:35:56,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=579, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2023-08-04 03:35:56,294 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-04 03:35:56,294 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 200 flow [2023-08-04 03:35:56,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 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 03:35:56,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:35:56,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:35:56,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 03:35:56,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:35:56,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:35:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash -735172741, now seen corresponding path program 1 times [2023-08-04 03:35:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:35:56,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752684834] [2023-08-04 03:35:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:56,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:35:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:56,381 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 03:35:56,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:35:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752684834] [2023-08-04 03:35:56,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752684834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:35:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955169015] [2023-08-04 03:35:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:35:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:35:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:35:56,412 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 03:35:56,414 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 03:35:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:35:56,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:35:56,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:35:56,514 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 03:35:56,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:35:56,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955169015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:35:56,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:35:56,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:35:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159031617] [2023-08-04 03:35:56,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:35:56,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:35:56,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:35:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:35:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:35:56,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 579 [2023-08-04 03:35:56,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 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 03:35:56,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:35:56,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 579 [2023-08-04 03:35:56,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:36:24,992 INFO L124 PetriNetUnfolderBase]: 402543/500429 cut-off events. [2023-08-04 03:36:24,992 INFO L125 PetriNetUnfolderBase]: For 25297/25297 co-relation queries the response was YES. [2023-08-04 03:36:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007533 conditions, 500429 events. 402543/500429 cut-off events. For 25297/25297 co-relation queries the response was YES. Maximal size of possible extension queue 10302. Compared 2997456 event pairs, 204472 based on Foata normal form. 0/309651 useless extension candidates. Maximal degree in co-relation 1007481. Up to 493183 conditions per place. [2023-08-04 03:36:28,014 INFO L140 encePairwiseOnDemand]: 576/579 looper letters, 90 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-04 03:36:28,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 436 flow [2023-08-04 03:36:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:36:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:36:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-04 03:36:28,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933793897524468 [2023-08-04 03:36:28,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-04 03:36:28,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-04 03:36:28,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:36:28,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-04 03:36:28,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 03:36:28,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:36:28,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:36:28,019 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 200 flow. Second operand 3 states and 857 transitions. [2023-08-04 03:36:28,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 436 flow [2023-08-04 03:36:28,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:36:28,067 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 204 flow [2023-08-04 03:36:28,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=579, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2023-08-04 03:36:28,068 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-04 03:36:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 204 flow [2023-08-04 03:36:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 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 03:36:28,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:36:28,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:36:28,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 03:36:28,272 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 03:36:28,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:36:28,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:36:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1273305008, now seen corresponding path program 1 times [2023-08-04 03:36:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:36:28,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830543391] [2023-08-04 03:36:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:36:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:28,296 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 03:36:28,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:36:28,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830543391] [2023-08-04 03:36:28,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830543391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:36:28,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539058877] [2023-08-04 03:36:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:28,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:36:28,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:36:28,298 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 03:36:28,300 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 03:36:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:28,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:36:28,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:36:28,375 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 03:36:28,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:36:28,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539058877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:36:28,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:36:28,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:36:28,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162277698] [2023-08-04 03:36:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:36:28,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:36:28,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:36:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:36:28,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:36:28,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 579 [2023-08-04 03:36:28,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 03:36:28,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:36:28,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 579 [2023-08-04 03:36:28,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:36:49,474 INFO L124 PetriNetUnfolderBase]: 296007/374449 cut-off events. [2023-08-04 03:36:49,474 INFO L125 PetriNetUnfolderBase]: For 24839/24839 co-relation queries the response was YES. [2023-08-04 03:36:50,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770159 conditions, 374449 events. 296007/374449 cut-off events. For 24839/24839 co-relation queries the response was YES. Maximal size of possible extension queue 7974. Compared 2349094 event pairs, 137918 based on Foata normal form. 0/248455 useless extension candidates. Maximal degree in co-relation 223994. Up to 246489 conditions per place. [2023-08-04 03:36:51,996 INFO L140 encePairwiseOnDemand]: 576/579 looper letters, 109 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-04 03:36:51,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 524 flow [2023-08-04 03:36:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:36:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:36:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 875 transitions. [2023-08-04 03:36:51,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037420840529648 [2023-08-04 03:36:51,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 875 transitions. [2023-08-04 03:36:51,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 875 transitions. [2023-08-04 03:36:52,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:36:52,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 875 transitions. [2023-08-04 03:36:52,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 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 03:36:52,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:36:52,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:36:52,005 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 204 flow. Second operand 3 states and 875 transitions. [2023-08-04 03:36:52,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 524 flow [2023-08-04 03:36:52,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:36:52,014 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 214 flow [2023-08-04 03:36:52,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=579, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2023-08-04 03:36:52,015 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-04 03:36:52,016 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 214 flow [2023-08-04 03:36:52,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 03:36:52,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:36:52,016 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 03:36:52,023 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 03:36:52,222 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 03:36:52,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:36:52,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:36:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1656679899, now seen corresponding path program 1 times [2023-08-04 03:36:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:36:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399926727] [2023-08-04 03:36:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:36:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:52,309 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 03:36:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:36:52,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399926727] [2023-08-04 03:36:52,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399926727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:36:52,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059697914] [2023-08-04 03:36:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:52,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:36:52,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:36:52,333 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 03:36:52,381 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 03:36:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:52,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:36:52,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:36:52,464 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 03:36:52,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:36:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059697914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:36:52,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:36:52,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:36:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991977962] [2023-08-04 03:36:52,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:36:52,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:36:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:36:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:36:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:36:52,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 579 [2023-08-04 03:36:52,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 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 03:36:52,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:36:52,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 579 [2023-08-04 03:36:52,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:12,653 INFO L124 PetriNetUnfolderBase]: 285576/358974 cut-off events. [2023-08-04 03:37:12,654 INFO L125 PetriNetUnfolderBase]: For 82248/82248 co-relation queries the response was YES. [2023-08-04 03:37:13,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763951 conditions, 358974 events. 285576/358974 cut-off events. For 82248/82248 co-relation queries the response was YES. Maximal size of possible extension queue 7598. Compared 2172487 event pairs, 180542 based on Foata normal form. 0/244531 useless extension candidates. Maximal degree in co-relation 303306. Up to 315795 conditions per place. [2023-08-04 03:37:14,750 INFO L140 encePairwiseOnDemand]: 576/579 looper letters, 110 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-04 03:37:14,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 536 flow [2023-08-04 03:37:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:37:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:37:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 875 transitions. [2023-08-04 03:37:14,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037420840529648 [2023-08-04 03:37:14,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 875 transitions. [2023-08-04 03:37:14,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 875 transitions. [2023-08-04 03:37:14,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:14,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 875 transitions. [2023-08-04 03:37:14,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 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 03:37:14,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:37:14,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:37:14,756 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 214 flow. Second operand 3 states and 875 transitions. [2023-08-04 03:37:14,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 536 flow [2023-08-04 03:37:17,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 121 transitions, 534 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:37:17,790 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 224 flow [2023-08-04 03:37:17,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=579, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-04 03:37:17,791 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2023-08-04 03:37:17,791 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 224 flow [2023-08-04 03:37:17,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 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 03:37:17,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:17,791 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 03:37:17,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 03:37:17,996 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 03:37:17,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:37:17,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1058314653, now seen corresponding path program 1 times [2023-08-04 03:37:17,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144949375] [2023-08-04 03:37:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:18,034 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 03:37:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144949375] [2023-08-04 03:37:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144949375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:37:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862513231] [2023-08-04 03:37:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:18,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:37:18,051 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 03:37:18,065 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 03:37:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:18,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 03:37:18,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:37:18,138 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 03:37:18,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:37:18,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862513231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:37:18,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:37:18,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:37:18,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715736357] [2023-08-04 03:37:18,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:37:18,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:37:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:37:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:37:18,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 579 [2023-08-04 03:37:18,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 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 03:37:18,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:18,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 579 [2023-08-04 03:37:18,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:38,966 INFO L124 PetriNetUnfolderBase]: 285576/358951 cut-off events. [2023-08-04 03:37:38,966 INFO L125 PetriNetUnfolderBase]: For 71866/71866 co-relation queries the response was YES. [2023-08-04 03:37:39,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766031 conditions, 358951 events. 285576/358951 cut-off events. For 71866/71866 co-relation queries the response was YES. Maximal size of possible extension queue 7598. Compared 2162228 event pairs, 202963 based on Foata normal form. 1/245157 useless extension candidates. Maximal degree in co-relation 659700. Up to 355979 conditions per place. [2023-08-04 03:37:41,258 INFO L140 encePairwiseOnDemand]: 576/579 looper letters, 68 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 03:37:41,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 366 flow [2023-08-04 03:37:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:37:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:37:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-08-04 03:37:41,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789867587795049 [2023-08-04 03:37:41,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-08-04 03:37:41,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-08-04 03:37:41,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:41,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-08-04 03:37:41,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 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 03:37:41,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:37:41,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 579.0) internal successors, (2316), 4 states have internal predecessors, (2316), 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 03:37:41,286 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 224 flow. Second operand 3 states and 832 transitions. [2023-08-04 03:37:41,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 366 flow [2023-08-04 03:37:44,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:37:44,797 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 234 flow [2023-08-04 03:37:44,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=579, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-08-04 03:37:44,798 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 6 predicate places. [2023-08-04 03:37:44,798 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 234 flow [2023-08-04 03:37:44,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 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 03:37:44,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:44,799 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 03:37:44,805 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 03:37:45,004 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 03:37:45,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:37:45,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1974395194, now seen corresponding path program 1 times [2023-08-04 03:37:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:45,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806621421] [2023-08-04 03:37:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:45,065 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 03:37:45,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806621421] [2023-08-04 03:37:45,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806621421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:37:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20715063] [2023-08-04 03:37:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:37:45,081 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 03:37:45,122 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 03:37:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:45,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:37:45,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:37:45,182 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 03:37:45,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:37:45,197 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 03:37:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20715063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:37:45,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:37:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:37:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392662926] [2023-08-04 03:37:45,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:37:45,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:37:45,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:37:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:37:45,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 579 [2023-08-04 03:37:45,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 234 flow. Second operand has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 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 03:37:45,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:45,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 579 [2023-08-04 03:37:45,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:38:03,604 INFO L124 PetriNetUnfolderBase]: 259246/323738 cut-off events. [2023-08-04 03:38:03,604 INFO L125 PetriNetUnfolderBase]: For 56231/56231 co-relation queries the response was YES. [2023-08-04 03:38:04,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690196 conditions, 323738 events. 259246/323738 cut-off events. For 56231/56231 co-relation queries the response was YES. Maximal size of possible extension queue 7026. Compared 1882436 event pairs, 107964 based on Foata normal form. 6/219037 useless extension candidates. Maximal degree in co-relation 690177. Up to 321403 conditions per place. [2023-08-04 03:38:05,667 INFO L140 encePairwiseOnDemand]: 575/579 looper letters, 82 selfloop transitions, 3 changer transitions 1/95 dead transitions. [2023-08-04 03:38:05,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 438 flow [2023-08-04 03:38:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:38:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:38:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1099 transitions. [2023-08-04 03:38:05,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745250431778929 [2023-08-04 03:38:05,669 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1099 transitions. [2023-08-04 03:38:05,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1099 transitions. [2023-08-04 03:38:05,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:38:05,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1099 transitions. [2023-08-04 03:38:05,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 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 03:38:05,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 579.0) internal successors, (2895), 5 states have internal predecessors, (2895), 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 03:38:05,673 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 579.0) internal successors, (2895), 5 states have internal predecessors, (2895), 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 03:38:05,673 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 234 flow. Second operand 4 states and 1099 transitions. [2023-08-04 03:38:05,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 438 flow [2023-08-04 03:38:07,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 434 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:38:07,487 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 244 flow [2023-08-04 03:38:07,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=579, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2023-08-04 03:38:07,487 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2023-08-04 03:38:07,487 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 244 flow [2023-08-04 03:38:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 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 03:38:07,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:07,488 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 03:38:07,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 03:38:07,693 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 03:38:07,694 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:38:07,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1986341997, now seen corresponding path program 1 times [2023-08-04 03:38:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:07,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262434295] [2023-08-04 03:38:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:07,784 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 03:38:07,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:38:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262434295] [2023-08-04 03:38:07,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262434295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:38:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556594723] [2023-08-04 03:38:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:07,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:38:07,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:38:07,811 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 03:38:07,817 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 03:38:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:07,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:38:07,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:38:07,904 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 03:38:07,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:38:07,918 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 03:38:07,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556594723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:38:07,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:38:07,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:38:07,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515561167] [2023-08-04 03:38:07,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:38:07,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:38:07,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:38:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:38:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:38:07,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 579 [2023-08-04 03:38:07,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 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 03:38:07,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:38:07,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 579 [2023-08-04 03:38:07,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:38:26,881 INFO L124 PetriNetUnfolderBase]: 253014/319543 cut-off events. [2023-08-04 03:38:26,881 INFO L125 PetriNetUnfolderBase]: For 18651/18651 co-relation queries the response was YES. [2023-08-04 03:38:27,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676694 conditions, 319543 events. 253014/319543 cut-off events. For 18651/18651 co-relation queries the response was YES. Maximal size of possible extension queue 7248. Compared 1935709 event pairs, 66820 based on Foata normal form. 480/218267 useless extension candidates. Maximal degree in co-relation 676667. Up to 231302 conditions per place. [2023-08-04 03:38:28,885 INFO L140 encePairwiseOnDemand]: 575/579 looper letters, 130 selfloop transitions, 3 changer transitions 1/143 dead transitions. [2023-08-04 03:38:28,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 640 flow [2023-08-04 03:38:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:38:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:38:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1147 transitions. [2023-08-04 03:38:28,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4952504317789292 [2023-08-04 03:38:28,892 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1147 transitions. [2023-08-04 03:38:28,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1147 transitions. [2023-08-04 03:38:28,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:38:28,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1147 transitions. [2023-08-04 03:38:28,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.75) internal successors, (1147), 4 states have internal predecessors, (1147), 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 03:38:28,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 579.0) internal successors, (2895), 5 states have internal predecessors, (2895), 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 03:38:28,897 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 579.0) internal successors, (2895), 5 states have internal predecessors, (2895), 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 03:38:28,897 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 244 flow. Second operand 4 states and 1147 transitions. [2023-08-04 03:38:28,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 640 flow [2023-08-04 03:38:54,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 143 transitions, 631 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:38:54,128 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 249 flow [2023-08-04 03:38:54,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=579, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-04 03:38:54,129 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 12 predicate places. [2023-08-04 03:38:54,129 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 249 flow [2023-08-04 03:38:54,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 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 03:38:54,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:54,129 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 03:38:54,134 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 03:38:54,330 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 03:38:54,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:38:54,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 505150561, now seen corresponding path program 1 times [2023-08-04 03:38:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:54,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497950840] [2023-08-04 03:38:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:54,379 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 03:38:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:38:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497950840] [2023-08-04 03:38:54,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497950840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:38:54,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106364010] [2023-08-04 03:38:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:54,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:38:54,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:38:54,395 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 03:38:54,398 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 03:38:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:54,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:38:54,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:38:54,496 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 03:38:54,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:38:54,506 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 03:38:54,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106364010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:38:54,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:38:54,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:38:54,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801286566] [2023-08-04 03:38:54,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:38:54,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:38:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:38:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:38:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:38:54,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 579 [2023-08-04 03:38:54,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 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 03:38:54,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:38:54,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 579 [2023-08-04 03:38:54,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand