/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/pthread_lazy01_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:32:35,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:32:35,604 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:32:35,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:32:35,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:32:35,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:32:35,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:32:35,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:32:35,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:32:35,648 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:32:35,648 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:32:35,649 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:32:35,649 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:32:35,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:32:35,650 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:32:35,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:32:35,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:32:35,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:32:35,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:32:35,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:32:35,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:32:35,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:32:35,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:32:35,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:32:35,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:32:35,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:32:35,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:32:35,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:32:35,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:32:35,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:32:35,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:32:35,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:32:35,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:32:35,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:32:35,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:32:35,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:32:35,655 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:32:35,655 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:32:35,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:32:35,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:32:35,656 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:32:35,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:32:35,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:32:35,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:32:35,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:32:35,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:32:35,904 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:32:35,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i [2023-08-04 01:32:37,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:32:37,291 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:32:37,292 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i [2023-08-04 01:32:37,303 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721ec1be7/113dc07f51d24b44a106c54071cb77b2/FLAG1f6272318 [2023-08-04 01:32:37,315 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721ec1be7/113dc07f51d24b44a106c54071cb77b2 [2023-08-04 01:32:37,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:32:37,318 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:32:37,319 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:32:37,319 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:32:37,322 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:32:37,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bce6c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37, skipping insertion in model container [2023-08-04 01:32:37,323 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,364 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:32:37,618 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i[31042,31055] [2023-08-04 01:32:37,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:32:37,636 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:32:37,650 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [257] [2023-08-04 01:32:37,652 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [257] [2023-08-04 01:32:37,664 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i[31042,31055] [2023-08-04 01:32:37,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:32:37,713 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:32:37,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37 WrapperNode [2023-08-04 01:32:37,714 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:32:37,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:32:37,715 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:32:37,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:32:37,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,760 INFO L138 Inliner]: procedures = 169, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 110 [2023-08-04 01:32:37,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:32:37,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:32:37,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:32:37,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:32:37,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,795 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,796 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:32:37,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:32:37,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:32:37,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:32:37,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (1/1) ... [2023-08-04 01:32:37,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:32:37,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:32:37,847 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 01:32:37,849 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 01:32:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:32:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 01:32:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 01:32:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 01:32:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 01:32:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 01:32:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 01:32:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:32:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 01:32:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:32:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:32:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:32:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:32:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:32:37,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:32:37,876 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 01:32:37,977 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:32:37,979 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:32:38,140 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:32:38,147 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:32:38,147 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 01:32:38,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:32:38 BoogieIcfgContainer [2023-08-04 01:32:38,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:32:38,151 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:32:38,151 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:32:38,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:32:38,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:32:37" (1/3) ... [2023-08-04 01:32:38,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3a6b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:32:38, skipping insertion in model container [2023-08-04 01:32:38,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:32:37" (2/3) ... [2023-08-04 01:32:38,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3a6b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:32:38, skipping insertion in model container [2023-08-04 01:32:38,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:32:38" (3/3) ... [2023-08-04 01:32:38,156 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_lazy01_bound2.i [2023-08-04 01:32:38,164 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:32:38,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:32:38,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:32:38,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:32:38,263 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 01:32:38,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 312 flow [2023-08-04 01:32:38,415 INFO L124 PetriNetUnfolderBase]: 78/540 cut-off events. [2023-08-04 01:32:38,416 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 01:32:38,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 540 events. 78/540 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2816 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 01:32:38,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 135 transitions, 312 flow [2023-08-04 01:32:38,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 132 transitions, 297 flow [2023-08-04 01:32:38,438 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:32:38,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 132 transitions, 297 flow [2023-08-04 01:32:38,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 132 transitions, 297 flow [2023-08-04 01:32:38,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 297 flow [2023-08-04 01:32:38,514 INFO L124 PetriNetUnfolderBase]: 66/516 cut-off events. [2023-08-04 01:32:38,515 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 01:32:38,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 516 events. 66/516 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2703 event pairs, 0 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-08-04 01:32:38,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 3998 [2023-08-04 01:32:41,035 INFO L134 LiptonReduction]: Checked pairs total: 9209 [2023-08-04 01:32:41,035 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 01:32:41,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:32:41,052 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;@2ac8e4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:32:41,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 01:32:41,056 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:32:41,056 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 01:32:41,056 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:32:41,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:32:41,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:32:41,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:32:41,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:32:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1266645045, now seen corresponding path program 1 times [2023-08-04 01:32:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:32:41,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733627141] [2023-08-04 01:32:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:32:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:32:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:32:41,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:32:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:32:41,207 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:32:41,208 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:32:41,209 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 01:32:41,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 01:32:41,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 01:32:41,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:32:41,217 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:32:41,219 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 01:32:41,220 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:32:41,220 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:32:41,259 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 01:32:41,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 174 transitions, 438 flow [2023-08-04 01:32:41,718 INFO L124 PetriNetUnfolderBase]: 788/3526 cut-off events. [2023-08-04 01:32:41,718 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 01:32:41,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4200 conditions, 3526 events. 788/3526 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28331 event pairs, 11 based on Foata normal form. 0/3028 useless extension candidates. Maximal degree in co-relation 2129. Up to 192 conditions per place. [2023-08-04 01:32:41,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 174 transitions, 438 flow [2023-08-04 01:32:41,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 174 transitions, 438 flow [2023-08-04 01:32:41,749 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:32:41,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 174 transitions, 438 flow [2023-08-04 01:32:41,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 174 transitions, 438 flow [2023-08-04 01:32:41,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 174 transitions, 438 flow [2023-08-04 01:32:42,094 INFO L124 PetriNetUnfolderBase]: 788/3526 cut-off events. [2023-08-04 01:32:42,095 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 01:32:42,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4200 conditions, 3526 events. 788/3526 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28331 event pairs, 11 based on Foata normal form. 0/3028 useless extension candidates. Maximal degree in co-relation 2129. Up to 192 conditions per place. [2023-08-04 01:32:42,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 10772 [2023-08-04 01:32:44,523 INFO L134 LiptonReduction]: Checked pairs total: 30880 [2023-08-04 01:32:44,524 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-04 01:32:44,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:32:44,527 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;@2ac8e4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:32:44,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 01:32:44,535 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:32:44,535 INFO L124 PetriNetUnfolderBase]: 10/121 cut-off events. [2023-08-04 01:32:44,535 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 01:32:44,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:32:44,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:32:44,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:32:44,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:32:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1153193686, now seen corresponding path program 1 times [2023-08-04 01:32:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:32:44,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046116019] [2023-08-04 01:32:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:32:44,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:32:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:32:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:32:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:32:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046116019] [2023-08-04 01:32:44,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046116019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:32:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681344149] [2023-08-04 01:32:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:32:44,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:32:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:32:44,709 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 01:32:44,712 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 01:32:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:32:44,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:32:44,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:32:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:32:44,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:32:44,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681344149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:32:44,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:32:44,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:32:44,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049045871] [2023-08-04 01:32:44,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:32:44,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:32:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:32:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:32:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:32:44,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 286 [2023-08-04 01:32:44,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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 01:32:44,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:32:44,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 286 [2023-08-04 01:32:44,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:33:51,800 INFO L124 PetriNetUnfolderBase]: 756266/995751 cut-off events. [2023-08-04 01:33:51,802 INFO L125 PetriNetUnfolderBase]: For 121809/121809 co-relation queries the response was YES. [2023-08-04 01:33:54,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019793 conditions, 995751 events. 756266/995751 cut-off events. For 121809/121809 co-relation queries the response was YES. Maximal size of possible extension queue 21573. Compared 7480557 event pairs, 454380 based on Foata normal form. 0/898800 useless extension candidates. Maximal degree in co-relation 595340. Up to 952640 conditions per place. [2023-08-04 01:33:55,649 INFO L140 encePairwiseOnDemand]: 280/286 looper letters, 43 selfloop transitions, 5 changer transitions 31/87 dead transitions. [2023-08-04 01:33:55,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 412 flow [2023-08-04 01:33:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:33:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:33:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 754 transitions. [2023-08-04 01:33:55,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2023-08-04 01:33:55,686 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 754 transitions. [2023-08-04 01:33:55,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 754 transitions. [2023-08-04 01:33:55,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:33:55,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 754 transitions. [2023-08-04 01:33:55,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.8) internal successors, (754), 5 states have internal predecessors, (754), 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 01:33:55,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 01:33:55,717 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 01:33:55,719 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 244 flow. Second operand 5 states and 754 transitions. [2023-08-04 01:33:55,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 412 flow [2023-08-04 01:33:55,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 87 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:33:55,848 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 137 flow [2023-08-04 01:33:55,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2023-08-04 01:33:55,857 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2023-08-04 01:33:55,857 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 137 flow [2023-08-04 01:33:55,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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 01:33:55,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:33:55,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:33:55,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 01:33:56,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:33:56,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:33:56,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:33:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1390612492, now seen corresponding path program 1 times [2023-08-04 01:33:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:33:56,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843261632] [2023-08-04 01:33:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:33:56,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:33:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:33:56,131 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 01:33:56,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:33:56,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843261632] [2023-08-04 01:33:56,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843261632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:33:56,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:33:56,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:33:56,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791986246] [2023-08-04 01:33:56,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:33:56,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:33:56,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:33:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:33:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:33:56,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 286 [2023-08-04 01:33:56,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 01:33:56,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:33:56,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 286 [2023-08-04 01:33:56,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:34:04,223 INFO L124 PetriNetUnfolderBase]: 108626/140374 cut-off events. [2023-08-04 01:34:04,223 INFO L125 PetriNetUnfolderBase]: For 5696/5696 co-relation queries the response was YES. [2023-08-04 01:34:04,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285799 conditions, 140374 events. 108626/140374 cut-off events. For 5696/5696 co-relation queries the response was YES. Maximal size of possible extension queue 3983. Compared 852310 event pairs, 86432 based on Foata normal form. 1/135270 useless extension candidates. Maximal degree in co-relation 64250. Up to 138219 conditions per place. [2023-08-04 01:34:04,966 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 38 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 01:34:04,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 48 transitions, 222 flow [2023-08-04 01:34:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:34:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:34:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-04 01:34:04,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221445221445221 [2023-08-04 01:34:04,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-04 01:34:04,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-04 01:34:04,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:34:04,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-04 01:34:04,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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 01:34:04,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:34:04,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:34:04,973 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 137 flow. Second operand 3 states and 448 transitions. [2023-08-04 01:34:04,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 48 transitions, 222 flow [2023-08-04 01:34:04,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 48 transitions, 217 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 01:34:04,979 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 131 flow [2023-08-04 01:34:04,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-04 01:34:04,980 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -11 predicate places. [2023-08-04 01:34:04,980 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 131 flow [2023-08-04 01:34:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 01:34:04,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:34:04,981 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:04,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:34:04,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:34:04,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:34:04,982 INFO L85 PathProgramCache]: Analyzing trace with hash 95800252, now seen corresponding path program 1 times [2023-08-04 01:34:04,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:34:04,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380125478] [2023-08-04 01:34:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:04,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:34:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:34:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:34:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380125478] [2023-08-04 01:34:05,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380125478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:34:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694975614] [2023-08-04 01:34:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:05,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:34:05,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:34:05,071 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 01:34:05,076 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 01:34:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:05,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:34:05,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:34:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:34:05,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:34:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:34:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694975614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:34:05,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:34:05,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:34:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641607378] [2023-08-04 01:34:05,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:34:05,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:34:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:34:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:34:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:34:05,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 286 [2023-08-04 01:34:05,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:34:05,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:34:05,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 286 [2023-08-04 01:34:05,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:34:12,093 INFO L124 PetriNetUnfolderBase]: 93813/120433 cut-off events. [2023-08-04 01:34:12,094 INFO L125 PetriNetUnfolderBase]: For 4072/4072 co-relation queries the response was YES. [2023-08-04 01:34:12,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244314 conditions, 120433 events. 93813/120433 cut-off events. For 4072/4072 co-relation queries the response was YES. Maximal size of possible extension queue 3669. Compared 706231 event pairs, 55600 based on Foata normal form. 4/116196 useless extension candidates. Maximal degree in co-relation 64152. Up to 118433 conditions per place. [2023-08-04 01:34:13,086 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 43 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-04 01:34:13,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 242 flow [2023-08-04 01:34:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:34:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:34:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 587 transitions. [2023-08-04 01:34:13,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131118881118881 [2023-08-04 01:34:13,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 587 transitions. [2023-08-04 01:34:13,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 587 transitions. [2023-08-04 01:34:13,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:34:13,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 587 transitions. [2023-08-04 01:34:13,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 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 01:34:13,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 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 01:34:13,093 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 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 01:34:13,093 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 131 flow. Second operand 4 states and 587 transitions. [2023-08-04 01:34:13,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 242 flow [2023-08-04 01:34:13,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:34:13,096 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 128 flow [2023-08-04 01:34:13,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-08-04 01:34:13,097 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -10 predicate places. [2023-08-04 01:34:13,097 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 128 flow [2023-08-04 01:34:13,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:34:13,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:34:13,098 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:13,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 01:34:13,303 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,SelfDestructingSolverStorable3 [2023-08-04 01:34:13,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:34:13,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:34:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1296649507, now seen corresponding path program 1 times [2023-08-04 01:34:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:34:13,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588476517] [2023-08-04 01:34:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:13,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:34:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:34:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:34:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588476517] [2023-08-04 01:34:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588476517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:34:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620343330] [2023-08-04 01:34:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:13,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:34:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:34:13,403 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 01:34:13,405 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 01:34:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:13,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:34:13,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:34:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:34:13,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:34:13,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620343330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:34:13,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:34:13,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:34:13,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750631549] [2023-08-04 01:34:13,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:34:13,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:34:13,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:34:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:34:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:34:13,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 286 [2023-08-04 01:34:13,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 43 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:34:13,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:34:13,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 286 [2023-08-04 01:34:13,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:34:19,907 INFO L124 PetriNetUnfolderBase]: 93101/121483 cut-off events. [2023-08-04 01:34:19,907 INFO L125 PetriNetUnfolderBase]: For 3414/3414 co-relation queries the response was YES. [2023-08-04 01:34:20,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245092 conditions, 121483 events. 93101/121483 cut-off events. For 3414/3414 co-relation queries the response was YES. Maximal size of possible extension queue 3856. Compared 749141 event pairs, 26612 based on Foata normal form. 0/117562 useless extension candidates. Maximal degree in co-relation 64305. Up to 116016 conditions per place. [2023-08-04 01:34:20,537 INFO L140 encePairwiseOnDemand]: 282/286 looper letters, 62 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-04 01:34:20,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 322 flow [2023-08-04 01:34:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:34:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:34:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 742 transitions. [2023-08-04 01:34:20,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188811188811189 [2023-08-04 01:34:20,539 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 742 transitions. [2023-08-04 01:34:20,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 742 transitions. [2023-08-04 01:34:20,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:34:20,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 742 transitions. [2023-08-04 01:34:20,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 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 01:34:20,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 01:34:20,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 01:34:20,544 INFO L175 Difference]: Start difference. First operand has 60 places, 43 transitions, 128 flow. Second operand 5 states and 742 transitions. [2023-08-04 01:34:20,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 322 flow [2023-08-04 01:34:20,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 315 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:34:20,547 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 140 flow [2023-08-04 01:34:20,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-08-04 01:34:20,548 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -10 predicate places. [2023-08-04 01:34:20,548 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 140 flow [2023-08-04 01:34:20,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:34:20,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:34:20,549 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:20,556 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 01:34:20,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:34:20,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:34:20,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:34:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1391162706, now seen corresponding path program 1 times [2023-08-04 01:34:20,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:34:20,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057739172] [2023-08-04 01:34:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:20,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:34:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:34:20,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:34:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057739172] [2023-08-04 01:34:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057739172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:34:20,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:34:20,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 01:34:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796576492] [2023-08-04 01:34:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:34:20,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:34:20,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:34:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:34:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:34:20,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 286 [2023-08-04 01:34:20,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 01:34:20,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:34:20,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 286 [2023-08-04 01:34:20,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:34:27,187 INFO L124 PetriNetUnfolderBase]: 89147/115569 cut-off events. [2023-08-04 01:34:27,188 INFO L125 PetriNetUnfolderBase]: For 4354/4354 co-relation queries the response was YES. [2023-08-04 01:34:27,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234059 conditions, 115569 events. 89147/115569 cut-off events. For 4354/4354 co-relation queries the response was YES. Maximal size of possible extension queue 3839. Compared 697819 event pairs, 73792 based on Foata normal form. 20/111808 useless extension candidates. Maximal degree in co-relation 61363. Up to 111847 conditions per place. [2023-08-04 01:34:27,794 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 45 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 01:34:27,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 251 flow [2023-08-04 01:34:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:34:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:34:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 01:34:27,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291375291375291 [2023-08-04 01:34:27,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 01:34:27,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 01:34:27,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:34:27,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 01:34:27,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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 01:34:27,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:34:27,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:34:27,799 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 140 flow. Second operand 3 states and 454 transitions. [2023-08-04 01:34:27,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 251 flow [2023-08-04 01:34:27,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:34:27,801 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 138 flow [2023-08-04 01:34:27,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-04 01:34:27,802 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-04 01:34:27,802 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 138 flow [2023-08-04 01:34:27,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 01:34:27,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:34:27,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:34:27,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:34:27,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:34:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1577930313, now seen corresponding path program 1 times [2023-08-04 01:34:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:34:27,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934944516] [2023-08-04 01:34:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:27,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:34:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:27,859 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 01:34:27,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:34:27,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934944516] [2023-08-04 01:34:27,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934944516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:34:27,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038507555] [2023-08-04 01:34:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:27,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:34:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:34:27,861 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 01:34:27,866 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 01:34:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:27,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:34:27,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:34:27,979 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 01:34:27,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:34:27,997 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 01:34:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038507555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:34:27,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:34:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:34:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101174554] [2023-08-04 01:34:27,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:34:27,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:34:27,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:34:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:34:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:34:28,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 286 [2023-08-04 01:34:28,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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 01:34:28,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:34:28,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 286 [2023-08-04 01:34:28,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:34:33,398 INFO L124 PetriNetUnfolderBase]: 74325/95827 cut-off events. [2023-08-04 01:34:33,398 INFO L125 PetriNetUnfolderBase]: For 3514/3514 co-relation queries the response was YES. [2023-08-04 01:34:33,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193995 conditions, 95827 events. 74325/95827 cut-off events. For 3514/3514 co-relation queries the response was YES. Maximal size of possible extension queue 3627. Compared 559228 event pairs, 47872 based on Foata normal form. 60/93006 useless extension candidates. Maximal degree in co-relation 50792. Up to 91427 conditions per place. [2023-08-04 01:34:34,190 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 55 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-04 01:34:34,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 295 flow [2023-08-04 01:34:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:34:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:34:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 598 transitions. [2023-08-04 01:34:34,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-08-04 01:34:34,192 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 598 transitions. [2023-08-04 01:34:34,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 598 transitions. [2023-08-04 01:34:34,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:34:34,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 598 transitions. [2023-08-04 01:34:34,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 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 01:34:34,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 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 01:34:34,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 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 01:34:34,196 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 138 flow. Second operand 4 states and 598 transitions. [2023-08-04 01:34:34,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 295 flow [2023-08-04 01:34:34,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:34:34,198 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 135 flow [2023-08-04 01:34:34,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-04 01:34:34,198 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-08-04 01:34:34,198 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 135 flow [2023-08-04 01:34:34,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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 01:34:34,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:34:34,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:34,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 01:34:34,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:34:34,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:34:34,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:34:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1007051425, now seen corresponding path program 1 times [2023-08-04 01:34:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:34:34,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246971711] [2023-08-04 01:34:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:34,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:34:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:34:34,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:34:34,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246971711] [2023-08-04 01:34:34,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246971711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:34:34,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054636848] [2023-08-04 01:34:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:34:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:34:34,477 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 01:34:34,479 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 01:34:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:34,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:34:34,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:34:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:34:34,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:34:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054636848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:34:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:34:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:34:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362469443] [2023-08-04 01:34:34,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:34:34,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:34:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:34:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:34:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:34:34,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 286 [2023-08-04 01:34:34,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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 01:34:34,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:34:34,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 286 [2023-08-04 01:34:34,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:34:38,204 INFO L124 PetriNetUnfolderBase]: 52645/67947 cut-off events. [2023-08-04 01:34:38,204 INFO L125 PetriNetUnfolderBase]: For 2970/2970 co-relation queries the response was YES. [2023-08-04 01:34:38,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138915 conditions, 67947 events. 52645/67947 cut-off events. For 2970/2970 co-relation queries the response was YES. Maximal size of possible extension queue 2665. Compared 371906 event pairs, 1717 based on Foata normal form. 4800/70826 useless extension candidates. Maximal degree in co-relation 36826. Up to 31696 conditions per place. [2023-08-04 01:34:38,403 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 0 selfloop transitions, 0 changer transitions 90/90 dead transitions. [2023-08-04 01:34:38,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 395 flow [2023-08-04 01:34:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:34:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:34:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-04 01:34:38,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300699300699301 [2023-08-04 01:34:38,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-04 01:34:38,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-04 01:34:38,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:34:38,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-04 01:34:38,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 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 01:34:38,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 01:34:38,409 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 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 01:34:38,409 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 135 flow. Second operand 5 states and 758 transitions. [2023-08-04 01:34:38,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 395 flow [2023-08-04 01:34:38,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 388 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:34:38,567 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-08-04 01:34:38,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2023-08-04 01:34:38,568 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-04 01:34:38,568 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-08-04 01:34:38,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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 01:34:38,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 01:34:38,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 01:34:38,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 01:34:38,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 01:34:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:34:38,774 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:38,775 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 01:34:38,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 174 transitions, 438 flow [2023-08-04 01:34:38,977 INFO L124 PetriNetUnfolderBase]: 788/3526 cut-off events. [2023-08-04 01:34:38,977 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 01:34:38,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4200 conditions, 3526 events. 788/3526 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28331 event pairs, 11 based on Foata normal form. 0/3028 useless extension candidates. Maximal degree in co-relation 2129. Up to 192 conditions per place. [2023-08-04 01:34:38,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 174 transitions, 438 flow [2023-08-04 01:34:39,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 172 transitions, 426 flow [2023-08-04 01:34:39,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:34:39,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 172 transitions, 426 flow [2023-08-04 01:34:39,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 172 transitions, 426 flow [2023-08-04 01:34:39,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 172 transitions, 426 flow [2023-08-04 01:34:39,276 INFO L124 PetriNetUnfolderBase]: 788/3522 cut-off events. [2023-08-04 01:34:39,276 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-08-04 01:34:39,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 3522 events. 788/3522 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28146 event pairs, 11 based on Foata normal form. 0/3024 useless extension candidates. Maximal degree in co-relation 2123. Up to 192 conditions per place. [2023-08-04 01:34:39,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 10672 [2023-08-04 01:34:41,619 INFO L134 LiptonReduction]: Checked pairs total: 34861 [2023-08-04 01:34:41,619 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-04 01:34:41,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:34:41,621 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;@2ac8e4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:34:41,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 01:34:41,624 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:34:41,624 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-04 01:34:41,624 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 01:34:41,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:34:41,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:41,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:34:41,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:34:41,625 INFO L85 PathProgramCache]: Analyzing trace with hash 139246229, now seen corresponding path program 1 times [2023-08-04 01:34:41,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:34:41,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86497411] [2023-08-04 01:34:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:41,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:34:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:34:41,656 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 01:34:41,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:34:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86497411] [2023-08-04 01:34:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86497411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:34:41,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:34:41,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:34:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594045315] [2023-08-04 01:34:41,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:34:41,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:34:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:34:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:34:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:34:41,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 286 [2023-08-04 01:34:41,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 01:34:41,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:34:41,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 286 [2023-08-04 01:34:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:35:51,275 INFO L124 PetriNetUnfolderBase]: 753117/987087 cut-off events. [2023-08-04 01:35:51,275 INFO L125 PetriNetUnfolderBase]: For 129060/129060 co-relation queries the response was YES. [2023-08-04 01:35:53,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006328 conditions, 987087 events. 753117/987087 cut-off events. For 129060/129060 co-relation queries the response was YES. Maximal size of possible extension queue 21091. Compared 7234432 event pairs, 580008 based on Foata normal form. 0/889106 useless extension candidates. Maximal degree in co-relation 592172. Up to 948330 conditions per place. [2023-08-04 01:35:57,097 INFO L140 encePairwiseOnDemand]: 281/286 looper letters, 65 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 01:35:57,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 370 flow [2023-08-04 01:35:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:35:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:35:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-04 01:35:57,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571095571095571 [2023-08-04 01:35:57,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-04 01:35:57,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-04 01:35:57,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:35:57,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-04 01:35:57,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 01:35:57,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:35:57,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:35:57,102 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 232 flow. Second operand 3 states and 478 transitions. [2023-08-04 01:35:57,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 370 flow [2023-08-04 01:35:58,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:35:58,394 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 230 flow [2023-08-04 01:35:58,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-04 01:35:58,395 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-04 01:35:58,395 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 230 flow [2023-08-04 01:35:58,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 01:35:58,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:35:58,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:35:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 01:35:58,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:35:58,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:35:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1905148023, now seen corresponding path program 1 times [2023-08-04 01:35:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:35:58,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539247558] [2023-08-04 01:35:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:35:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:35:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:35:58,440 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 01:35:58,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:35:58,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539247558] [2023-08-04 01:35:58,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539247558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:35:58,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995326555] [2023-08-04 01:35:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:35:58,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:35:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:35:58,445 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 01:35:58,445 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 01:35:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:35:58,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:35:58,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:35:58,542 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 01:35:58,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:35:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995326555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:35:58,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:35:58,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-04 01:35:58,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097901370] [2023-08-04 01:35:58,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:35:58,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:35:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:35:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:35:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:35:58,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 01:35:58,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 01:35:58,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:35:58,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 01:35:58,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:37:33,827 INFO L124 PetriNetUnfolderBase]: 1180171/1514738 cut-off events. [2023-08-04 01:37:33,828 INFO L125 PetriNetUnfolderBase]: For 160289/160289 co-relation queries the response was YES. [2023-08-04 01:37:39,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091845 conditions, 1514738 events. 1180171/1514738 cut-off events. For 160289/160289 co-relation queries the response was YES. Maximal size of possible extension queue 26947. Compared 10654487 event pairs, 336977 based on Foata normal form. 4452/1373177 useless extension candidates. Maximal degree in co-relation 3091797. Up to 1405822 conditions per place. [2023-08-04 01:37:45,454 INFO L140 encePairwiseOnDemand]: 279/286 looper letters, 105 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2023-08-04 01:37:45,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 584 flow [2023-08-04 01:37:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:37:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:37:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-04 01:37:45,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5932400932400932 [2023-08-04 01:37:45,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-04 01:37:45,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-04 01:37:45,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:37:45,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-04 01:37:45,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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 01:37:45,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:37:45,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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 01:37:45,469 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 230 flow. Second operand 3 states and 509 transitions. [2023-08-04 01:37:45,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 584 flow [2023-08-04 01:37:45,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 581 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:37:45,828 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 263 flow [2023-08-04 01:37:45,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2023-08-04 01:37:45,829 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 01:37:45,829 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 263 flow [2023-08-04 01:37:45,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 01:37:45,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:37:45,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:37:45,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 01:37:46,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:37:46,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:37:46,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:37:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1640759334, now seen corresponding path program 1 times [2023-08-04 01:37:46,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:37:46,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318982444] [2023-08-04 01:37:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:37:46,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:37:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:37:46,331 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 01:37:46,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:37:46,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318982444] [2023-08-04 01:37:46,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318982444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:37:46,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626751921] [2023-08-04 01:37:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:37:46,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:37:46,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:37:46,354 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 01:37:46,390 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 01:37:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:37:46,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:37:46,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:37:46,466 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 01:37:46,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:37:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626751921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:37:46,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:37:46,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:37:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449658034] [2023-08-04 01:37:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:37:46,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:37:46,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:37:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:37:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:37:46,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 286 [2023-08-04 01:37:46,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 01:37:46,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:37:46,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 286 [2023-08-04 01:37:46,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:39:41,773 INFO L124 PetriNetUnfolderBase]: 1080508/1411007 cut-off events. [2023-08-04 01:39:41,773 INFO L125 PetriNetUnfolderBase]: For 306166/306166 co-relation queries the response was YES.