/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 PROGRAM_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 08:28:21,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:28:21,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:28:21,085 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:28:21,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:28:21,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:28:21,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:28:21,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:28:21,099 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:28:21,099 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:28:21,099 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:28:21,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:28:21,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:28:21,100 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:28:21,100 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:28:21,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:28:21,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:28:21,101 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:28:21,101 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:28:21,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:28:21,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:28:21,102 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:28:21,102 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:28:21,102 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:28:21,102 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:28:21,103 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:28:21,103 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:28:21,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:28:21,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:28:21,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:28:21,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:28:21,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:28:21,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:28:21,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:28:21,105 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:28:21,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:28:21,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:28:21,105 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:28:21,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:28:21,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:28:21,106 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:28:21,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:28:21,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:28:21,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:28:21,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:28:21,313 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:28:21,314 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:28:21,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-04 08:28:22,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:28:22,477 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:28:22,477 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-04 08:28:22,483 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba25ae5af/02a649ba8b314c5998feb046fd566fec/FLAG3160797f7 [2023-08-04 08:28:22,492 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba25ae5af/02a649ba8b314c5998feb046fd566fec [2023-08-04 08:28:22,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:28:22,498 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:28:22,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:28:22,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:28:22,501 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:28:22,501 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e73739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22, skipping insertion in model container [2023-08-04 08:28:22,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,541 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:28:22,673 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 08:28:22,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:28:22,686 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:28:22,714 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 08:28:22,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:28:22,729 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:28:22,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22 WrapperNode [2023-08-04 08:28:22,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:28:22,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:28:22,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:28:22,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:28:22,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,787 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 649 [2023-08-04 08:28:22,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:28:22,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:28:22,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:28:22,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:28:22,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,800 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,801 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,824 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,832 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:28:22,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:28:22,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:28:22,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:28:22,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (1/1) ... [2023-08-04 08:28:22,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:28:22,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:22,867 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 08:28:22,869 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 08:28:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:28:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:28:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:28:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:28:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:28:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:28:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:28:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:28:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:28:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:28:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:28:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:28:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:28:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:28:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:28:22,892 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 08:28:23,008 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:28:23,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:28:23,559 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:28:23,566 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:28:23,566 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:28:23,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:28:23 BoogieIcfgContainer [2023-08-04 08:28:23,567 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:28:23,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:28:23,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:28:23,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:28:23,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:28:22" (1/3) ... [2023-08-04 08:28:23,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5928b374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:28:23, skipping insertion in model container [2023-08-04 08:28:23,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:28:22" (2/3) ... [2023-08-04 08:28:23,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5928b374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:28:23, skipping insertion in model container [2023-08-04 08:28:23,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:28:23" (3/3) ... [2023-08-04 08:28:23,573 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-04 08:28:23,578 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:28:23,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:28:23,584 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:28:23,584 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:28:23,694 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:28:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,212 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:28:24,212 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:28:24,248 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 08:28:24,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,273 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:28:24,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,669 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:28:24,669 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:28:24,711 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 08:28:24,829 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-04 08:28:44,602 INFO L134 LiptonReduction]: Checked pairs total: 267542 [2023-08-04 08:28:44,602 INFO L136 LiptonReduction]: Total number of compositions: 918 [2023-08-04 08:28:44,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:28:44,624 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;@ef90b77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:28:44,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:28:44,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:28:44,631 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2023-08-04 08:28:44,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:28:44,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:44,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:44,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:44,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash -499537452, now seen corresponding path program 1 times [2023-08-04 08:28:44,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:44,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555796801] [2023-08-04 08:28:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:44,957 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 08:28:44,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:44,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555796801] [2023-08-04 08:28:44,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555796801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:44,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:44,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:28:44,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251469911] [2023-08-04 08:28:44,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:44,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:45,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:45,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1683 [2023-08-04 08:28:45,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 700.3333333333334) internal successors, (2101), 3 states have internal predecessors, (2101), 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 08:28:45,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:45,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1683 [2023-08-04 08:28:45,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:54,581 INFO L124 PetriNetUnfolderBase]: 110493/141285 cut-off events. [2023-08-04 08:28:54,582 INFO L125 PetriNetUnfolderBase]: For 5106/5106 co-relation queries the response was YES. [2023-08-04 08:28:54,781 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 08:28:55,206 INFO L140 encePairwiseOnDemand]: 1675/1683 looper letters, 88 selfloop transitions, 6 changer transitions 3/100 dead transitions. [2023-08-04 08:28:55,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 430 flow [2023-08-04 08:28:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2189 transitions. [2023-08-04 08:28:55,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-04 08:28:55,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2189 transitions. [2023-08-04 08:28:55,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2189 transitions. [2023-08-04 08:28:55,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:55,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2189 transitions. [2023-08-04 08:28:55,237 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 08:28:55,249 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 08:28:55,251 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 08:28:55,252 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 238 flow. Second operand 3 states and 2189 transitions. [2023-08-04 08:28:55,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 430 flow [2023-08-04 08:28:55,261 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 08:28:55,263 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 256 flow [2023-08-04 08:28:55,264 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=256, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-08-04 08:28:55,268 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 08:28:55,268 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 256 flow [2023-08-04 08:28:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 700.3333333333334) internal successors, (2101), 3 states have internal predecessors, (2101), 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 08:28:55,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:55,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:55,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:28:55,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:55,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:55,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1608196217, now seen corresponding path program 1 times [2023-08-04 08:28:55,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:55,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790496688] [2023-08-04 08:28:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:55,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:28:55,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:55,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790496688] [2023-08-04 08:28:55,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790496688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:55,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:55,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:55,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301471778] [2023-08-04 08:28:55,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:55,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:55,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:28:55,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 709.3333333333334) internal successors, (2128), 3 states have internal predecessors, (2128), 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 08:28:55,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:55,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:28:55,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:03,863 INFO L124 PetriNetUnfolderBase]: 108929/138796 cut-off events. [2023-08-04 08:29:03,864 INFO L125 PetriNetUnfolderBase]: For 4606/4606 co-relation queries the response was YES. [2023-08-04 08:29:04,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278792 conditions, 138796 events. 108929/138796 cut-off events. For 4606/4606 co-relation queries the response was YES. Maximal size of possible extension queue 2725. Compared 718422 event pairs, 45948 based on Foata normal form. 0/91181 useless extension candidates. Maximal degree in co-relation 278758. Up to 137800 conditions per place. [2023-08-04 08:29:04,636 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 110 selfloop transitions, 2 changer transitions 1/116 dead transitions. [2023-08-04 08:29:04,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 520 flow [2023-08-04 08:29:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2226 transitions. [2023-08-04 08:29:04,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44087938205585264 [2023-08-04 08:29:04,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2226 transitions. [2023-08-04 08:29:04,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2226 transitions. [2023-08-04 08:29:04,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:04,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2226 transitions. [2023-08-04 08:29:04,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 742.0) internal successors, (2226), 3 states have internal predecessors, (2226), 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 08:29:04,652 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 08:29:04,655 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 08:29:04,655 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 256 flow. Second operand 3 states and 2226 transitions. [2023-08-04 08:29:04,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 520 flow [2023-08-04 08:29:04,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 116 transitions, 502 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:29:04,681 INFO L231 Difference]: Finished difference. Result has 73 places, 97 transitions, 246 flow [2023-08-04 08:29:04,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=73, PETRI_TRANSITIONS=97} [2023-08-04 08:29:04,684 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2023-08-04 08:29:04,688 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 97 transitions, 246 flow [2023-08-04 08:29:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 709.3333333333334) internal successors, (2128), 3 states have internal predecessors, (2128), 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 08:29:04,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:04,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:04,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:29:04,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:04,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1146420261, now seen corresponding path program 1 times [2023-08-04 08:29:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:04,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570012739] [2023-08-04 08:29:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:04,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:29:04,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570012739] [2023-08-04 08:29:04,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570012739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:04,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521830542] [2023-08-04 08:29:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:04,767 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 08:29:04,768 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 08:29:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:04,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:29:04,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:29:04,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:29:04,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521830542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:04,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:29:04,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:29:04,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576872900] [2023-08-04 08:29:04,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:04,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:04,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:29:04,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:29:04,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 97 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 710.3333333333334) internal successors, (2131), 3 states have internal predecessors, (2131), 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 08:29:04,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:04,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:29:04,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:13,350 INFO L124 PetriNetUnfolderBase]: 107463/136760 cut-off events. [2023-08-04 08:29:13,351 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2023-08-04 08:29:13,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274586 conditions, 136760 events. 107463/136760 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 2788. Compared 718727 event pairs, 45674 based on Foata normal form. 0/89766 useless extension candidates. Maximal degree in co-relation 274547. Up to 135279 conditions per place. [2023-08-04 08:29:13,847 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 128 selfloop transitions, 2 changer transitions 1/134 dead transitions. [2023-08-04 08:29:13,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 134 transitions, 582 flow [2023-08-04 08:29:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2244 transitions. [2023-08-04 08:29:13,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-04 08:29:13,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2244 transitions. [2023-08-04 08:29:13,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2244 transitions. [2023-08-04 08:29:13,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:13,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2244 transitions. [2023-08-04 08:29:13,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 748.0) internal successors, (2244), 3 states have internal predecessors, (2244), 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 08:29:13,862 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 08:29:13,864 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 08:29:13,864 INFO L175 Difference]: Start difference. First operand has 73 places, 97 transitions, 246 flow. Second operand 3 states and 2244 transitions. [2023-08-04 08:29:13,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 134 transitions, 582 flow [2023-08-04 08:29:13,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 134 transitions, 578 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:29:13,867 INFO L231 Difference]: Finished difference. Result has 74 places, 97 transitions, 250 flow [2023-08-04 08:29:13,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=74, PETRI_TRANSITIONS=97} [2023-08-04 08:29:13,867 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -1 predicate places. [2023-08-04 08:29:13,867 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 97 transitions, 250 flow [2023-08-04 08:29:13,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 710.3333333333334) internal successors, (2131), 3 states have internal predecessors, (2131), 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 08:29:13,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:13,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:13,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:29:14,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:14,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:14,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:14,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1786772920, now seen corresponding path program 1 times [2023-08-04 08:29:14,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:14,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119304636] [2023-08-04 08:29:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:14,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:14,135 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 08:29:14,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:14,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119304636] [2023-08-04 08:29:14,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119304636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621012834] [2023-08-04 08:29:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:14,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:14,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:14,153 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 08:29:14,217 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 08:29:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:14,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:29:14,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:29:14,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:29:14,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621012834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:14,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:29:14,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:29:14,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085379732] [2023-08-04 08:29:14,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:14,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:29:14,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:29:14,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 711.3333333333334) internal successors, (2134), 3 states have internal predecessors, (2134), 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 08:29:14,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:14,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:29:14,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:22,891 INFO L124 PetriNetUnfolderBase]: 107294/137293 cut-off events. [2023-08-04 08:29:22,891 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-04 08:29:23,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275457 conditions, 137293 events. 107294/137293 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 2939. Compared 748180 event pairs, 43853 based on Foata normal form. 0/90772 useless extension candidates. Maximal degree in co-relation 275418. Up to 125084 conditions per place. [2023-08-04 08:29:23,542 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 146 selfloop transitions, 2 changer transitions 1/152 dead transitions. [2023-08-04 08:29:23,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 152 transitions, 658 flow [2023-08-04 08:29:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2262 transitions. [2023-08-04 08:29:23,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44800950683303625 [2023-08-04 08:29:23,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2262 transitions. [2023-08-04 08:29:23,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2262 transitions. [2023-08-04 08:29:23,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:23,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2262 transitions. [2023-08-04 08:29:23,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 754.0) internal successors, (2262), 3 states have internal predecessors, (2262), 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 08:29:23,556 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 08:29:23,557 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 08:29:23,557 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 250 flow. Second operand 3 states and 2262 transitions. [2023-08-04 08:29:23,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 152 transitions, 658 flow [2023-08-04 08:29:23,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 152 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:29:23,559 INFO L231 Difference]: Finished difference. Result has 75 places, 97 transitions, 254 flow [2023-08-04 08:29:23,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=75, PETRI_TRANSITIONS=97} [2023-08-04 08:29:23,563 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2023-08-04 08:29:23,563 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 97 transitions, 254 flow [2023-08-04 08:29:23,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 711.3333333333334) internal successors, (2134), 3 states have internal predecessors, (2134), 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 08:29:23,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:23,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:23,573 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 08:29:23,771 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 08:29:23,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:23,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1401232047, now seen corresponding path program 1 times [2023-08-04 08:29:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:23,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285878390] [2023-08-04 08:29:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:29:23,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:23,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285878390] [2023-08-04 08:29:23,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285878390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:23,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002369644] [2023-08-04 08:29:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:23,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:23,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:23,831 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 08:29:23,836 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 08:29:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:23,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:29:23,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:29:23,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:29:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002369644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:23,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:29:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:29:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577999106] [2023-08-04 08:29:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:23,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:23,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:29:23,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:29:23,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 97 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 712.3333333333334) internal successors, (2137), 3 states have internal predecessors, (2137), 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 08:29:23,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:23,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:29:23,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:28,620 INFO L124 PetriNetUnfolderBase]: 57842/74828 cut-off events. [2023-08-04 08:29:28,620 INFO L125 PetriNetUnfolderBase]: For 5122/5122 co-relation queries the response was YES. [2023-08-04 08:29:28,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157106 conditions, 74828 events. 57842/74828 cut-off events. For 5122/5122 co-relation queries the response was YES. Maximal size of possible extension queue 1607. Compared 384099 event pairs, 24589 based on Foata normal form. 0/53241 useless extension candidates. Maximal degree in co-relation 157066. Up to 49645 conditions per place. [2023-08-04 08:29:28,874 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 151 selfloop transitions, 2 changer transitions 0/156 dead transitions. [2023-08-04 08:29:28,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 684 flow [2023-08-04 08:29:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2266 transitions. [2023-08-04 08:29:28,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44880174291938996 [2023-08-04 08:29:28,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2266 transitions. [2023-08-04 08:29:28,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2266 transitions. [2023-08-04 08:29:28,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:28,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2266 transitions. [2023-08-04 08:29:28,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 755.3333333333334) internal successors, (2266), 3 states have internal predecessors, (2266), 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 08:29:28,887 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 08:29:28,888 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 08:29:28,888 INFO L175 Difference]: Start difference. First operand has 75 places, 97 transitions, 254 flow. Second operand 3 states and 2266 transitions. [2023-08-04 08:29:28,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 684 flow [2023-08-04 08:29:28,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 156 transitions, 680 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:29:28,893 INFO L231 Difference]: Finished difference. Result has 76 places, 98 transitions, 262 flow [2023-08-04 08:29:28,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=76, PETRI_TRANSITIONS=98} [2023-08-04 08:29:28,894 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2023-08-04 08:29:28,894 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 98 transitions, 262 flow [2023-08-04 08:29:28,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 712.3333333333334) internal successors, (2137), 3 states have internal predecessors, (2137), 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 08:29:28,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:28,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:28,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:29:29,100 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 08:29:29,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:29,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1369013047, now seen corresponding path program 1 times [2023-08-04 08:29:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013014884] [2023-08-04 08:29:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:29:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013014884] [2023-08-04 08:29:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013014884] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20240669] [2023-08-04 08:29:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:29,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:29,168 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 08:29:29,171 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 08:29:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:29,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:29:29,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:29:29,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:29:29,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20240669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:29,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:29:29,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:29:29,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849037303] [2023-08-04 08:29:29,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:29,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:29,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:29:29,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:29:29,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 98 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 713.6666666666666) internal successors, (2141), 3 states have internal predecessors, (2141), 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 08:29:29,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:29,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:29:29,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:33,775 INFO L124 PetriNetUnfolderBase]: 53569/68903 cut-off events. [2023-08-04 08:29:33,775 INFO L125 PetriNetUnfolderBase]: For 13165/13165 co-relation queries the response was YES. [2023-08-04 08:29:33,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146787 conditions, 68903 events. 53569/68903 cut-off events. For 13165/13165 co-relation queries the response was YES. Maximal size of possible extension queue 1491. Compared 339498 event pairs, 32981 based on Foata normal form. 0/50209 useless extension candidates. Maximal degree in co-relation 146746. Up to 64305 conditions per place. [2023-08-04 08:29:34,006 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 152 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2023-08-04 08:29:34,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 157 transitions, 694 flow [2023-08-04 08:29:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2266 transitions. [2023-08-04 08:29:34,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44880174291938996 [2023-08-04 08:29:34,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2266 transitions. [2023-08-04 08:29:34,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2266 transitions. [2023-08-04 08:29:34,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:34,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2266 transitions. [2023-08-04 08:29:34,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 755.3333333333334) internal successors, (2266), 3 states have internal predecessors, (2266), 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 08:29:34,017 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 08:29:34,018 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 08:29:34,018 INFO L175 Difference]: Start difference. First operand has 76 places, 98 transitions, 262 flow. Second operand 3 states and 2266 transitions. [2023-08-04 08:29:34,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 157 transitions, 694 flow [2023-08-04 08:29:34,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 157 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:29:34,232 INFO L231 Difference]: Finished difference. Result has 78 places, 99 transitions, 272 flow [2023-08-04 08:29:34,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=78, PETRI_TRANSITIONS=99} [2023-08-04 08:29:34,233 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2023-08-04 08:29:34,233 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 99 transitions, 272 flow [2023-08-04 08:29:34,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 713.6666666666666) internal successors, (2141), 3 states have internal predecessors, (2141), 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 08:29:34,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:34,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:34,241 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 08:29:34,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:34,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:34,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1693345509, now seen corresponding path program 1 times [2023-08-04 08:29:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:34,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879283337] [2023-08-04 08:29:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:34,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:29:34,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:34,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879283337] [2023-08-04 08:29:34,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879283337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:34,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028355797] [2023-08-04 08:29:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:34,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:34,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:34,503 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 08:29:34,505 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 08:29:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:34,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:29:34,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:34,638 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 08:29:34,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:29:34,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028355797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:34,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:29:34,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:29:34,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864818262] [2023-08-04 08:29:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:34,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:34,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:29:34,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:29:34,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 99 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 715.0) internal successors, (2145), 3 states have internal predecessors, (2145), 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 08:29:34,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:34,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:29:34,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:39,259 INFO L124 PetriNetUnfolderBase]: 53514/68811 cut-off events. [2023-08-04 08:29:39,259 INFO L125 PetriNetUnfolderBase]: For 8326/8326 co-relation queries the response was YES. [2023-08-04 08:29:39,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146765 conditions, 68811 events. 53514/68811 cut-off events. For 8326/8326 co-relation queries the response was YES. Maximal size of possible extension queue 1491. Compared 338718 event pairs, 34854 based on Foata normal form. 0/50214 useless extension candidates. Maximal degree in co-relation 146723. Up to 68167 conditions per place. [2023-08-04 08:29:39,513 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 146 selfloop transitions, 2 changer transitions 3/154 dead transitions. [2023-08-04 08:29:39,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 154 transitions, 684 flow [2023-08-04 08:29:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2262 transitions. [2023-08-04 08:29:39,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44800950683303625 [2023-08-04 08:29:39,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2262 transitions. [2023-08-04 08:29:39,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2262 transitions. [2023-08-04 08:29:39,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:39,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2262 transitions. [2023-08-04 08:29:39,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 754.0) internal successors, (2262), 3 states have internal predecessors, (2262), 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 08:29:39,524 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 08:29:39,524 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 08:29:39,524 INFO L175 Difference]: Start difference. First operand has 78 places, 99 transitions, 272 flow. Second operand 3 states and 2262 transitions. [2023-08-04 08:29:39,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 154 transitions, 684 flow [2023-08-04 08:29:39,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 154 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:29:39,756 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 270 flow [2023-08-04 08:29:39,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2023-08-04 08:29:39,756 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2023-08-04 08:29:39,756 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 270 flow [2023-08-04 08:29:39,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 715.0) internal successors, (2145), 3 states have internal predecessors, (2145), 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 08:29:39,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:39,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:39,765 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 08:29:39,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:39,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:39,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash 680875924, now seen corresponding path program 1 times [2023-08-04 08:29:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:39,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792403309] [2023-08-04 08:29:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:40,040 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 08:29:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:40,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792403309] [2023-08-04 08:29:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792403309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:40,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649333658] [2023-08-04 08:29:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:40,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:40,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:40,042 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 08:29:40,044 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 08:29:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:40,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:29:40,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:40,209 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 08:29:40,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:29:40,230 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 08:29:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649333658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:29:40,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:29:40,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:29:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269351821] [2023-08-04 08:29:40,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:29:40,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:29:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:29:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:29:40,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 686 out of 1683 [2023-08-04 08:29:40,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 692.125) internal successors, (5537), 8 states have internal predecessors, (5537), 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 08:29:40,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:40,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 686 of 1683 [2023-08-04 08:29:40,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:40,436 INFO L124 PetriNetUnfolderBase]: 45/101 cut-off events. [2023-08-04 08:29:40,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:29:40,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 101 events. 45/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 201 event pairs, 0 based on Foata normal form. 16/97 useless extension candidates. Maximal degree in co-relation 235. Up to 62 conditions per place. [2023-08-04 08:29:40,437 INFO L140 encePairwiseOnDemand]: 1674/1683 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2023-08-04 08:29:40,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 278 flow [2023-08-04 08:29:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:29:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:29:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5557 transitions. [2023-08-04 08:29:40,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127302436125966 [2023-08-04 08:29:40,446 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5557 transitions. [2023-08-04 08:29:40,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5557 transitions. [2023-08-04 08:29:40,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:40,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5557 transitions. [2023-08-04 08:29:40,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 694.625) internal successors, (5557), 8 states have internal predecessors, (5557), 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 08:29:40,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1683.0) internal successors, (15147), 9 states have internal predecessors, (15147), 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 08:29:40,471 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1683.0) internal successors, (15147), 9 states have internal predecessors, (15147), 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 08:29:40,471 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 270 flow. Second operand 8 states and 5557 transitions. [2023-08-04 08:29:40,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 278 flow [2023-08-04 08:29:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:29:40,472 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-04 08:29:40,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-04 08:29:40,473 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -37 predicate places. [2023-08-04 08:29:40,473 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-04 08:29:40,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 692.125) internal successors, (5537), 8 states have internal predecessors, (5537), 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 08:29:40,476 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:29:40,493 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 08:29:40,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:40,683 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:40,684 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:29:40,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:29:40,955 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:29:40,956 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:29:40,991 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 08:29:40,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:29:41,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-04 08:29:41,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:29:41,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:29:41,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:29:41,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:29:41,434 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:29:41,435 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:29:41,457 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 08:29:41,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-04 08:29:59,687 INFO L134 LiptonReduction]: Checked pairs total: 263464 [2023-08-04 08:29:59,687 INFO L136 LiptonReduction]: Total number of compositions: 917 [2023-08-04 08:29:59,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:29:59,689 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;@ef90b77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:29:59,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:29:59,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:29:59,692 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-04 08:29:59,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:29:59,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:59,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:59,693 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 08:29:59,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash -204437456, now seen corresponding path program 1 times [2023-08-04 08:29:59,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:59,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094731467] [2023-08-04 08:29:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:59,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:59,725 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 08:29:59,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:59,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094731467] [2023-08-04 08:29:59,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094731467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:59,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:29:59,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:29:59,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552074771] [2023-08-04 08:29:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:59,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:59,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:59,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:29:59,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1682 [2023-08-04 08:29:59,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 240 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 08:29:59,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:59,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1682 [2023-08-04 08:29:59,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:08,167 INFO L124 PetriNetUnfolderBase]: 117570/150466 cut-off events. [2023-08-04 08:30:08,167 INFO L125 PetriNetUnfolderBase]: For 5231/5231 co-relation queries the response was YES. [2023-08-04 08:30:08,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301950 conditions, 150466 events. 117570/150466 cut-off events. For 5231/5231 co-relation queries the response was YES. Maximal size of possible extension queue 2755. Compared 787635 event pairs, 76917 based on Foata normal form. 0/99494 useless extension candidates. Maximal degree in co-relation 280173. Up to 149115 conditions per place. [2023-08-04 08:30:08,532 INFO L140 encePairwiseOnDemand]: 1674/1682 looper letters, 70 selfloop transitions, 6 changer transitions 22/101 dead transitions. [2023-08-04 08:30:08,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 434 flow [2023-08-04 08:30:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2190 transitions. [2023-08-04 08:30:08,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340071343638526 [2023-08-04 08:30:08,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2190 transitions. [2023-08-04 08:30:08,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2190 transitions. [2023-08-04 08:30:08,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:08,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2190 transitions. [2023-08-04 08:30:08,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 730.0) internal successors, (2190), 3 states have internal predecessors, (2190), 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 08:30:08,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1682.0) internal successors, (6728), 4 states have internal predecessors, (6728), 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 08:30:08,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1682.0) internal successors, (6728), 4 states have internal predecessors, (6728), 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 08:30:08,547 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 240 flow. Second operand 3 states and 2190 transitions. [2023-08-04 08:30:08,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 434 flow [2023-08-04 08:30:08,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 434 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:30:08,554 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 199 flow [2023-08-04 08:30:08,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1682, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2023-08-04 08:30:08,555 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-08-04 08:30:08,555 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 199 flow [2023-08-04 08:30:08,555 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 08:30:08,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:08,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:08,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:30:08,556 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 08:30:08,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1062535603, now seen corresponding path program 1 times [2023-08-04 08:30:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:08,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46742892] [2023-08-04 08:30:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:08,618 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 08:30:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46742892] [2023-08-04 08:30:08,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46742892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641550151] [2023-08-04 08:30:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:08,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:08,633 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 08:30:08,635 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 08:30:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:08,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:30:08,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:08,787 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 08:30:08,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:30:08,799 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 08:30:08,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641550151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:30:08,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:30:08,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:30:08,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35533789] [2023-08-04 08:30:08,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:30:08,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:30:08,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:30:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:30:08,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1682 [2023-08-04 08:30:08,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 199 flow. Second operand has 8 states, 8 states have (on average 693.5) internal successors, (5548), 8 states have internal predecessors, (5548), 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 08:30:08,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:08,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1682 [2023-08-04 08:30:08,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:11,555 INFO L124 PetriNetUnfolderBase]: 32171/41517 cut-off events. [2023-08-04 08:30:11,556 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-08-04 08:30:11,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83485 conditions, 41517 events. 32171/41517 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 188862 event pairs, 20732 based on Foata normal form. 6/29876 useless extension candidates. Maximal degree in co-relation 83433. Up to 41414 conditions per place. [2023-08-04 08:30:11,732 INFO L140 encePairwiseOnDemand]: 1675/1682 looper letters, 70 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2023-08-04 08:30:11,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 405 flow [2023-08-04 08:30:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:30:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:30:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4240 transitions. [2023-08-04 08:30:11,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42013476020610385 [2023-08-04 08:30:11,738 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4240 transitions. [2023-08-04 08:30:11,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4240 transitions. [2023-08-04 08:30:11,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:11,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4240 transitions. [2023-08-04 08:30:11,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 706.6666666666666) internal successors, (4240), 6 states have internal predecessors, (4240), 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 08:30:11,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1682.0) internal successors, (11774), 7 states have internal predecessors, (11774), 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 08:30:11,749 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1682.0) internal successors, (11774), 7 states have internal predecessors, (11774), 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 08:30:11,749 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 199 flow. Second operand 6 states and 4240 transitions. [2023-08-04 08:30:11,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 405 flow [2023-08-04 08:30:11,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:30:11,751 INFO L231 Difference]: Finished difference. Result has 72 places, 88 transitions, 289 flow [2023-08-04 08:30:11,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1682, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=72, PETRI_TRANSITIONS=88} [2023-08-04 08:30:11,751 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-08-04 08:30:11,752 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 88 transitions, 289 flow [2023-08-04 08:30:11,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 693.5) internal successors, (5548), 8 states have internal predecessors, (5548), 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 08:30:11,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:11,752 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:11,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:30:11,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:11,957 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 08:30:11,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2117841904, now seen corresponding path program 2 times [2023-08-04 08:30:11,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:11,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285951787] [2023-08-04 08:30:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:11,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:12,276 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 08:30:12,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:12,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285951787] [2023-08-04 08:30:12,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285951787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793776406] [2023-08-04 08:30:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:30:12,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:12,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:30:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:30:12,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:30:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:30:12,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:30:12,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:12,513 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 08:30:12,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:30:12,586 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 08:30:12,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793776406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:30:12,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:30:12,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-04 08:30:12,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43372512] [2023-08-04 08:30:12,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:30:12,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 08:30:12,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:12,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 08:30:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 08:30:12,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1682 [2023-08-04 08:30:12,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 88 transitions, 289 flow. Second operand has 17 states, 17 states have (on average 692.7058823529412) internal successors, (11776), 17 states have internal predecessors, (11776), 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 08:30:12,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:12,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1682 [2023-08-04 08:30:12,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:15,789 INFO L124 PetriNetUnfolderBase]: 32171/41520 cut-off events. [2023-08-04 08:30:15,790 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-08-04 08:30:15,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83527 conditions, 41520 events. 32171/41520 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 188848 event pairs, 20732 based on Foata normal form. 1/29873 useless extension candidates. Maximal degree in co-relation 83424. Up to 41414 conditions per place. [2023-08-04 08:30:15,954 INFO L140 encePairwiseOnDemand]: 1675/1682 looper letters, 70 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2023-08-04 08:30:15,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 483 flow [2023-08-04 08:30:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:30:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:30:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4928 transitions. [2023-08-04 08:30:15,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41854934601664684 [2023-08-04 08:30:15,959 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4928 transitions. [2023-08-04 08:30:15,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4928 transitions. [2023-08-04 08:30:15,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:15,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4928 transitions. [2023-08-04 08:30:15,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 704.0) internal successors, (4928), 7 states have internal predecessors, (4928), 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 08:30:15,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1682.0) internal successors, (13456), 8 states have internal predecessors, (13456), 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 08:30:15,973 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1682.0) internal successors, (13456), 8 states have internal predecessors, (13456), 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 08:30:15,973 INFO L175 Difference]: Start difference. First operand has 72 places, 88 transitions, 289 flow. Second operand 7 states and 4928 transitions. [2023-08-04 08:30:15,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 483 flow [2023-08-04 08:30:15,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 91 transitions, 459 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 08:30:15,975 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 333 flow [2023-08-04 08:30:15,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1682, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=333, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2023-08-04 08:30:15,975 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-08-04 08:30:15,976 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 333 flow [2023-08-04 08:30:15,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 692.7058823529412) internal successors, (11776), 17 states have internal predecessors, (11776), 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 08:30:15,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:15,977 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:15,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:30:16,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:30:16,182 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 08:30:16,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:16,182 INFO L85 PathProgramCache]: Analyzing trace with hash -174361613, now seen corresponding path program 3 times [2023-08-04 08:30:16,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:16,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083053791] [2023-08-04 08:30:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:30:16,244 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:30:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:30:16,311 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:30:16,311 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:30:16,311 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:30:16,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:30:16,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:30:16,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 08:30:16,312 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 08:30:16,312 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:30:16,313 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:30:16,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:30:16,397 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:30:16,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:30:19,438 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 08:30:19,438 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 08:30:19,743 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 81774 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 08:30:19,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:30:19,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:30:19,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:30:19,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:30:19,847 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:30:19,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:30:23,085 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 08:30:23,085 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 08:30:23,360 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 81774 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 08:30:24,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 893880 [2023-08-04 08:30:50,038 INFO L134 LiptonReduction]: Checked pairs total: 1763672 [2023-08-04 08:30:50,038 INFO L136 LiptonReduction]: Total number of compositions: 1349 [2023-08-04 08:30:50,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:30:50,041 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;@ef90b77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:30:50,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:30:50,043 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:30:50,043 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2023-08-04 08:30:50,044 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:30:50,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:50,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:50,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:50,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1278242701, now seen corresponding path program 1 times [2023-08-04 08:30:50,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:50,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429708041] [2023-08-04 08:30:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:50,099 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 08:30:50,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429708041] [2023-08-04 08:30:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429708041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:50,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:30:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:30:50,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159342987] [2023-08-04 08:30:50,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:50,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:30:50,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1138 out of 2594 [2023-08-04 08:30:50,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 290 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 1141.3333333333333) internal successors, (3424), 3 states have internal predecessors, (3424), 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 08:30:50,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:50,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1138 of 2594 [2023-08-04 08:30:50,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand