/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:09:11,802 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:09:11,852 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:09:11,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:09:11,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:09:11,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:09:11,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:09:11,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:09:11,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:09:11,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:09:11,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:09:11,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:09:11,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:09:11,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:09:11,890 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:09:11,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:09:11,890 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:09:11,890 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:09:11,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:09:11,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:09:11,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:09:11,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:09:11,891 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:09:11,891 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:09:11,892 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:09:11,892 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:09:11,892 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:09:11,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:09:11,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:09:11,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:09:11,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:09:11,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:09:11,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:09:11,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:09:11,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:09:11,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:09:11,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:09:11,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:09:11,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:09:11,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:09:11,895 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:09:11,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:09:12,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:09:12,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:09:12,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:09:12,104 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:09:12,106 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:09:12,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-04 02:09:13,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:09:13,409 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:09:13,410 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-04 02:09:13,419 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/143c299d7/6904ce4f19aa4595b31f3b16418c1cdc/FLAGc7217b5e2 [2023-08-04 02:09:13,436 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/143c299d7/6904ce4f19aa4595b31f3b16418c1cdc [2023-08-04 02:09:13,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:09:13,441 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:09:13,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:09:13,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:09:13,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:09:13,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df6e60d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13, skipping insertion in model container [2023-08-04 02:09:13,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,481 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:09:13,686 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c[6693,6706] [2023-08-04 02:09:13,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:09:13,707 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:09:13,745 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c[6693,6706] [2023-08-04 02:09:13,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:09:13,758 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:09:13,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13 WrapperNode [2023-08-04 02:09:13,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:09:13,759 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:09:13,759 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:09:13,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:09:13,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,810 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 649 [2023-08-04 02:09:13,810 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:09:13,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:09:13,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:09:13,811 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:09:13,816 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,838 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,844 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:09:13,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:09:13,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:09:13,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:09:13,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (1/1) ... [2023-08-04 02:09:13,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:09:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:13,902 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 02:09:13,921 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 02:09:13,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:09:13,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:09:13,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:09:13,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:09:13,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:09:13,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:09:13,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:09:13,948 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 02:09:14,090 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:09:14,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:09:14,696 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:09:14,709 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:09:14,710 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 02:09:14,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:09:14 BoogieIcfgContainer [2023-08-04 02:09:14,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:09:14,715 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:09:14,716 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:09:14,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:09:14,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:09:13" (1/3) ... [2023-08-04 02:09:14,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bde8de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:09:14, skipping insertion in model container [2023-08-04 02:09:14,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:13" (2/3) ... [2023-08-04 02:09:14,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bde8de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:09:14, skipping insertion in model container [2023-08-04 02:09:14,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:09:14" (3/3) ... [2023-08-04 02:09:14,721 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-04 02:09:14,727 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:09:14,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:09:14,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:09:14,734 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:09:14,844 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:09:14,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:15,385 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 02:09:15,386 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 02:09:15,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-04 02:09:15,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:15,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:15,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:09:15,479 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:15,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:15,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:15,869 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 02:09:15,869 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 02:09:15,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-04 02:09:16,008 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-04 02:09:33,613 INFO L134 LiptonReduction]: Checked pairs total: 267542 [2023-08-04 02:09:33,614 INFO L136 LiptonReduction]: Total number of compositions: 918 [2023-08-04 02:09:33,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:09:33,629 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;@3d9858a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:09:33,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:09:33,633 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:09:33,634 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-04 02:09:33,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:09:33,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:33,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:33,634 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 02:09:33,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1769510446, now seen corresponding path program 1 times [2023-08-04 02:09:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132294424] [2023-08-04 02:09:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:09:33,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:33,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132294424] [2023-08-04 02:09:33,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132294424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:09:33,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:09:33,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:09:33,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109421195] [2023-08-04 02:09:33,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:09:33,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:09:33,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:09:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:09:34,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1683 [2023-08-04 02:09:34,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 699.3333333333334) internal successors, (2098), 3 states have internal predecessors, (2098), 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 02:09:34,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:34,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1683 [2023-08-04 02:09:34,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:43,438 INFO L124 PetriNetUnfolderBase]: 110493/141285 cut-off events. [2023-08-04 02:09:43,439 INFO L125 PetriNetUnfolderBase]: For 5106/5106 co-relation queries the response was YES. [2023-08-04 02:09:43,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283542 conditions, 141285 events. 110493/141285 cut-off events. For 5106/5106 co-relation queries the response was YES. Maximal size of possible extension queue 2629. Compared 733792 event pairs, 71640 based on Foata normal form. 0/92781 useless extension candidates. Maximal degree in co-relation 263068. Up to 139997 conditions per place. [2023-08-04 02:09:43,984 INFO L140 encePairwiseOnDemand]: 1675/1683 looper letters, 69 selfloop transitions, 6 changer transitions 22/100 dead transitions. [2023-08-04 02:09:43,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 430 flow [2023-08-04 02:09:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:09:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:09:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2189 transitions. [2023-08-04 02:09:43,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-04 02:09:43,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2189 transitions. [2023-08-04 02:09:43,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2189 transitions. [2023-08-04 02:09:44,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:44,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2189 transitions. [2023-08-04 02:09:44,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 729.6666666666666) internal successors, (2189), 3 states have internal predecessors, (2189), 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 02:09:44,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 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 02:09:44,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 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 02:09:44,026 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 238 flow. Second operand 3 states and 2189 transitions. [2023-08-04 02:09:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 430 flow [2023-08-04 02:09:44,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 430 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:09:44,036 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 197 flow [2023-08-04 02:09:44,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-04 02:09:44,040 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 02:09:44,041 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 197 flow [2023-08-04 02:09:44,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 699.3333333333334) internal successors, (2098), 3 states have internal predecessors, (2098), 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 02:09:44,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:44,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:44,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:09:44,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:09:44,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:44,050 INFO L85 PathProgramCache]: Analyzing trace with hash 792332941, now seen corresponding path program 1 times [2023-08-04 02:09:44,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:44,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219497109] [2023-08-04 02:09:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:44,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:09:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219497109] [2023-08-04 02:09:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219497109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:09:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180648818] [2023-08-04 02:09:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:44,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:44,193 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 02:09:44,249 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 02:09:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:44,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:09:44,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:09:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:09:44,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:09:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:09:44,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180648818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:09:44,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:09:44,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:09:44,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972805180] [2023-08-04 02:09:44,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:09:44,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:09:44,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:44,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:09:44,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:09:44,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-04 02:09:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 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 02:09:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:44,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-04 02:09:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:47,232 INFO L124 PetriNetUnfolderBase]: 30267/39000 cut-off events. [2023-08-04 02:09:47,233 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-08-04 02:09:47,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78451 conditions, 39000 events. 30267/39000 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 175260 event pairs, 19332 based on Foata normal form. 6/27863 useless extension candidates. Maximal degree in co-relation 78399. Up to 38922 conditions per place. [2023-08-04 02:09:47,423 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 69 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2023-08-04 02:09:47,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 401 flow [2023-08-04 02:09:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:09:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:09:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4239 transitions. [2023-08-04 02:09:47,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197860962566845 [2023-08-04 02:09:47,440 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4239 transitions. [2023-08-04 02:09:47,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4239 transitions. [2023-08-04 02:09:47,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:47,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4239 transitions. [2023-08-04 02:09:47,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 706.5) internal successors, (4239), 6 states have internal predecessors, (4239), 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 02:09:47,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1683.0) internal successors, (11781), 7 states have internal predecessors, (11781), 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 02:09:47,466 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1683.0) internal successors, (11781), 7 states have internal predecessors, (11781), 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 02:09:47,466 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 197 flow. Second operand 6 states and 4239 transitions. [2023-08-04 02:09:47,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 401 flow [2023-08-04 02:09:47,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:09:47,469 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 287 flow [2023-08-04 02:09:47,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-04 02:09:47,470 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-08-04 02:09:47,470 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 287 flow [2023-08-04 02:09:47,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 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 02:09:47,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:47,473 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:47,480 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 02:09:47,681 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 02:09:47,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:09:47,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -821312494, now seen corresponding path program 2 times [2023-08-04 02:09:47,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:47,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590915416] [2023-08-04 02:09:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:47,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:09:47,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590915416] [2023-08-04 02:09:47,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590915416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:09:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269791750] [2023-08-04 02:09:47,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:09:47,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:47,850 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 02:09:47,875 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 02:09:47,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:09:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:09:47,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:09:47,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:09:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:09:48,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:09:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:09:48,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269791750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:09:48,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:09:48,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-04 02:09:48,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419321556] [2023-08-04 02:09:48,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:09:48,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:09:48,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:09:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:09:48,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-04 02:09:48,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 287 flow. Second operand has 17 states, 17 states have (on average 692.4705882352941) internal successors, (11772), 17 states have internal predecessors, (11772), 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 02:09:48,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:48,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-04 02:09:48,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:51,541 INFO L124 PetriNetUnfolderBase]: 30267/39003 cut-off events. [2023-08-04 02:09:51,541 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-04 02:09:51,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78493 conditions, 39003 events. 30267/39003 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 175206 event pairs, 19332 based on Foata normal form. 1/27860 useless extension candidates. Maximal degree in co-relation 78390. Up to 38922 conditions per place. [2023-08-04 02:09:51,726 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 69 selfloop transitions, 18 changer transitions 0/90 dead transitions. [2023-08-04 02:09:51,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 479 flow [2023-08-04 02:09:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:09:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:09:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4927 transitions. [2023-08-04 02:09:51,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41821577115694764 [2023-08-04 02:09:51,736 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4927 transitions. [2023-08-04 02:09:51,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4927 transitions. [2023-08-04 02:09:51,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:51,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4927 transitions. [2023-08-04 02:09:51,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 703.8571428571429) internal successors, (4927), 7 states have internal predecessors, (4927), 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 02:09:51,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1683.0) internal successors, (13464), 8 states have internal predecessors, (13464), 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 02:09:51,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1683.0) internal successors, (13464), 8 states have internal predecessors, (13464), 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 02:09:51,911 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 287 flow. Second operand 7 states and 4927 transitions. [2023-08-04 02:09:51,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 479 flow [2023-08-04 02:09:51,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 455 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 02:09:51,916 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 331 flow [2023-08-04 02:09:51,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2023-08-04 02:09:51,917 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 02:09:51,917 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 331 flow [2023-08-04 02:09:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 692.4705882352941) internal successors, (11772), 17 states have internal predecessors, (11772), 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 02:09:51,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:51,920 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:51,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 02:09:52,125 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,SelfDestructingSolverStorable2 [2023-08-04 02:09:52,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:09:52,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash 857772109, now seen corresponding path program 3 times [2023-08-04 02:09:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:52,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768438343] [2023-08-04 02:09:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:09:52,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:09:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:09:52,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:09:52,225 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:09:52,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:09:52,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:09:52,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:09:52,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:09:52,227 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 02:09:52,229 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:09:52,229 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:09:52,229 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:09:52,317 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:09:52,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:56,010 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 02:09:56,010 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:09:56,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 8080 events. 1366/8080 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 81685 event pairs, 22 based on Foata normal form. 0/6958 useless extension candidates. Maximal degree in co-relation 5092. Up to 192 conditions per place. [2023-08-04 02:09:56,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:56,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:56,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:09:56,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:56,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:10:00,222 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 02:10:00,222 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:10:00,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 8080 events. 1366/8080 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 81685 event pairs, 22 based on Foata normal form. 0/6958 useless extension candidates. Maximal degree in co-relation 5092. Up to 192 conditions per place. [2023-08-04 02:10:01,787 INFO L119 LiptonReduction]: Number of co-enabled transitions 893880 [2023-08-04 02:10:25,880 INFO L134 LiptonReduction]: Checked pairs total: 1674354 [2023-08-04 02:10:25,880 INFO L136 LiptonReduction]: Total number of compositions: 1347 [2023-08-04 02:10:25,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:10:25,882 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;@3d9858a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:10:25,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:10:25,892 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:10:25,892 INFO L124 PetriNetUnfolderBase]: 26/183 cut-off events. [2023-08-04 02:10:25,892 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:10:25,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:10:25,892 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:10:25,892 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 02:10:25,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:10:25,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1330319433, now seen corresponding path program 1 times [2023-08-04 02:10:25,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:10:25,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915604483] [2023-08-04 02:10:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:10:25,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:10:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:10:25,951 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 02:10:25,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:10:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915604483] [2023-08-04 02:10:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915604483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:10:25,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:10:25,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:10:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71514774] [2023-08-04 02:10:25,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:10:25,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:10:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:10:25,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:10:25,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:10:25,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1138 out of 2592 [2023-08-04 02:10:25,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 290 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 1140.6666666666667) internal successors, (3422), 3 states have internal predecessors, (3422), 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 02:10:25,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:10:25,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1138 of 2592 [2023-08-04 02:10:25,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand