/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_array-eq-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:06:13,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:06:13,217 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:06:13,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:06:13,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:06:13,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:06:13,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:06:13,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:06:13,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:06:13,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:06:13,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:06:13,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:06:13,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:06:13,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:06:13,235 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:06:13,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:06:13,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:06:13,236 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:06:13,236 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:06:13,237 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:06:13,237 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:06:13,237 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:06:13,238 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:06:13,238 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:06:13,238 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:06:13,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:06:13,238 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:06:13,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:06:13,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:06:13,239 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:06:13,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:06:13,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:06:13,240 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:06:13,240 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:06:13,240 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:06:13,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:06:13,241 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:06:13,241 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:06:13,241 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:06:13,241 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:06:13,242 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:06:13,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:06:13,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:06:13,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:06:13,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:06:13,470 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:06:13,470 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:06:13,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_array-eq-trans.wvr_bound2.c [2023-08-04 08:06:14,550 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:06:14,749 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:06:14,749 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_array-eq-trans.wvr_bound2.c [2023-08-04 08:06:14,758 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b43fad5c/69c08e9f09c04f12adf9fbb944379767/FLAG86aa612f5 [2023-08-04 08:06:14,771 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b43fad5c/69c08e9f09c04f12adf9fbb944379767 [2023-08-04 08:06:14,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:06:14,774 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:06:14,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:06:14,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:06:14,777 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:06:14,778 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b127f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14, skipping insertion in model container [2023-08-04 08:06:14,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,800 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:06:14,899 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_array-eq-trans.wvr_bound2.c[2980,2993] [2023-08-04 08:06:14,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:06:14,907 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:06:14,922 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_array-eq-trans.wvr_bound2.c[2980,2993] [2023-08-04 08:06:14,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:06:14,934 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:06:14,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14 WrapperNode [2023-08-04 08:06:14,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:06:14,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:06:14,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:06:14,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:06:14,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,961 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 258 [2023-08-04 08:06:14,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:06:14,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:06:14,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:06:14,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:06:14,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:14,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:06:15,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:06:15,000 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:06:15,000 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:06:15,000 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (1/1) ... [2023-08-04 08:06:15,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:06:15,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:06:15,050 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 08:06:15,078 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 08:06:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:06:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:06:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:06:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:06:15,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:06:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:06:15,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:06:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:06:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:06:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:06:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:06:15,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:06:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:06:15,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:06:15,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:06:15,094 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 08:06:15,201 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:06:15,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:06:15,563 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:06:15,570 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:06:15,570 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:06:15,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:06:15 BoogieIcfgContainer [2023-08-04 08:06:15,571 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:06:15,573 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:06:15,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:06:15,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:06:15,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:06:14" (1/3) ... [2023-08-04 08:06:15,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a18d80b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:06:15, skipping insertion in model container [2023-08-04 08:06:15,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:06:14" (2/3) ... [2023-08-04 08:06:15,576 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a18d80b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:06:15, skipping insertion in model container [2023-08-04 08:06:15,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:06:15" (3/3) ... [2023-08-04 08:06:15,576 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_array-eq-trans.wvr_bound2.c [2023-08-04 08:06:15,581 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:06:15,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:06:15,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:06:15,617 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:06:15,671 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:06:15,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:15,942 INFO L124 PetriNetUnfolderBase]: 179/1198 cut-off events. [2023-08-04 08:06:15,942 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:06:15,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 1198 events. 179/1198 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6337 event pairs, 0 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 666. Up to 16 conditions per place. [2023-08-04 08:06:15,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:15,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:15,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:06:15,982 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:15,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:15,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:16,153 INFO L124 PetriNetUnfolderBase]: 179/1198 cut-off events. [2023-08-04 08:06:16,153 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:06:16,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 1198 events. 179/1198 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6337 event pairs, 0 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 666. Up to 16 conditions per place. [2023-08-04 08:06:16,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 14016 [2023-08-04 08:06:24,121 INFO L134 LiptonReduction]: Checked pairs total: 26262 [2023-08-04 08:06:24,121 INFO L136 LiptonReduction]: Total number of compositions: 332 [2023-08-04 08:06:24,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:06:24,138 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;@770ff2d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:06:24,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:06:24,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:06:24,151 INFO L124 PetriNetUnfolderBase]: 25/128 cut-off events. [2023-08-04 08:06:24,151 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:06:24,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:24,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:06:24,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:24,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -990734731, now seen corresponding path program 1 times [2023-08-04 08:06:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856615338] [2023-08-04 08:06:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:24,443 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 08:06:24,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:24,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856615338] [2023-08-04 08:06:24,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856615338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:06:24,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:06:24,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:06:24,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608857029] [2023-08-04 08:06:24,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:06:24,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:06:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:24,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:06:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:06:24,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 667 [2023-08-04 08:06:24,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 75 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 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 08:06:24,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:24,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 667 [2023-08-04 08:06:24,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:06:25,378 INFO L124 PetriNetUnfolderBase]: 8858/11979 cut-off events. [2023-08-04 08:06:25,378 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2023-08-04 08:06:25,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23935 conditions, 11979 events. 8858/11979 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 53665 event pairs, 3174 based on Foata normal form. 0/7680 useless extension candidates. Maximal degree in co-relation 20192. Up to 11637 conditions per place. [2023-08-04 08:06:25,433 INFO L140 encePairwiseOnDemand]: 663/667 looper letters, 70 selfloop transitions, 2 changer transitions 4/80 dead transitions. [2023-08-04 08:06:25,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 348 flow [2023-08-04 08:06:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:06:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:06:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 966 transitions. [2023-08-04 08:06:25,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-08-04 08:06:25,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 966 transitions. [2023-08-04 08:06:25,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 966 transitions. [2023-08-04 08:06:25,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:06:25,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 966 transitions. [2023-08-04 08:06:25,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 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 08:06:25,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:25,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:25,469 INFO L175 Difference]: Start difference. First operand has 60 places, 75 transitions, 192 flow. Second operand 3 states and 966 transitions. [2023-08-04 08:06:25,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 348 flow [2023-08-04 08:06:25,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:06:25,477 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 186 flow [2023-08-04 08:06:25,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2023-08-04 08:06:25,481 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-04 08:06:25,481 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 186 flow [2023-08-04 08:06:25,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 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 08:06:25,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:25,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:06:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:06:25,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:25,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash 384598815, now seen corresponding path program 1 times [2023-08-04 08:06:25,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:25,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786344595] [2023-08-04 08:06:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:25,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:06:25,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:25,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786344595] [2023-08-04 08:06:25,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786344595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:06:25,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208360537] [2023-08-04 08:06:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:25,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:06:25,622 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 08:06:25,624 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 08:06:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:25,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:06:25,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:06:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:06:25,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:06:25,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208360537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:06:25,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:06:25,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:06:25,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832643654] [2023-08-04 08:06:25,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:06:25,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:06:25,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:06:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:06:25,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 667 [2023-08-04 08:06:25,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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 08:06:25,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:25,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 667 [2023-08-04 08:06:25,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:06:26,333 INFO L124 PetriNetUnfolderBase]: 8720/11749 cut-off events. [2023-08-04 08:06:26,333 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-08-04 08:06:26,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23486 conditions, 11749 events. 8720/11749 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 51473 event pairs, 3161 based on Foata normal form. 0/7527 useless extension candidates. Maximal degree in co-relation 23432. Up to 11389 conditions per place. [2023-08-04 08:06:26,381 INFO L140 encePairwiseOnDemand]: 664/667 looper letters, 75 selfloop transitions, 2 changer transitions 1/82 dead transitions. [2023-08-04 08:06:26,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 364 flow [2023-08-04 08:06:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:06:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:06:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2023-08-04 08:06:26,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847576211894053 [2023-08-04 08:06:26,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2023-08-04 08:06:26,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2023-08-04 08:06:26,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:06:26,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2023-08-04 08:06:26,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 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 08:06:26,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:26,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:26,390 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 186 flow. Second operand 3 states and 970 transitions. [2023-08-04 08:06:26,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 364 flow [2023-08-04 08:06:26,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 82 transitions, 348 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:06:26,394 INFO L231 Difference]: Finished difference. Result has 57 places, 71 transitions, 178 flow [2023-08-04 08:06:26,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=57, PETRI_TRANSITIONS=71} [2023-08-04 08:06:26,395 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-04 08:06:26,395 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 71 transitions, 178 flow [2023-08-04 08:06:26,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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 08:06:26,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:26,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:06:26,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:06:26,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:26,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:26,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash 176691760, now seen corresponding path program 1 times [2023-08-04 08:06:26,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386058132] [2023-08-04 08:06:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:26,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:06:26,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386058132] [2023-08-04 08:06:26,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386058132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:06:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411023718] [2023-08-04 08:06:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:26,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:26,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:06:26,832 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 08:06:26,834 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 08:06:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:26,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:06:26,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:06:26,948 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 08:06:26,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:06:26,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411023718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:06:26,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:06:26,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:06:26,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852581081] [2023-08-04 08:06:26,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:06:26,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:06:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:06:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:06:26,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 667 [2023-08-04 08:06:26,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 71 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 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 08:06:26,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:26,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 667 [2023-08-04 08:06:26,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:06:27,712 INFO L124 PetriNetUnfolderBase]: 8704/11742 cut-off events. [2023-08-04 08:06:27,712 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-04 08:06:27,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23490 conditions, 11742 events. 8704/11742 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 51164 event pairs, 3140 based on Foata normal form. 0/7561 useless extension candidates. Maximal degree in co-relation 10388. Up to 11067 conditions per place. [2023-08-04 08:06:27,814 INFO L140 encePairwiseOnDemand]: 664/667 looper letters, 80 selfloop transitions, 2 changer transitions 1/87 dead transitions. [2023-08-04 08:06:27,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 376 flow [2023-08-04 08:06:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:06:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:06:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-08-04 08:06:27,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487256371814093 [2023-08-04 08:06:27,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-08-04 08:06:27,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-08-04 08:06:27,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:06:27,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-08-04 08:06:27,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 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 08:06:27,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:27,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:27,827 INFO L175 Difference]: Start difference. First operand has 57 places, 71 transitions, 178 flow. Second operand 3 states and 975 transitions. [2023-08-04 08:06:27,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 376 flow [2023-08-04 08:06:27,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:06:27,829 INFO L231 Difference]: Finished difference. Result has 58 places, 71 transitions, 182 flow [2023-08-04 08:06:27,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=58, PETRI_TRANSITIONS=71} [2023-08-04 08:06:27,830 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2023-08-04 08:06:27,830 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 71 transitions, 182 flow [2023-08-04 08:06:27,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 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 08:06:27,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:27,831 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] [2023-08-04 08:06:27,840 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 08:06:28,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:06:28,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:28,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash 566881289, now seen corresponding path program 1 times [2023-08-04 08:06:28,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:28,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576285766] [2023-08-04 08:06:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:28,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:06:28,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:28,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576285766] [2023-08-04 08:06:28,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576285766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:06:28,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652268988] [2023-08-04 08:06:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:28,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:28,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:06:28,129 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 08:06:28,145 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 08:06:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:28,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:06:28,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:06:28,218 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 08:06:28,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:06:28,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652268988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:06:28,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:06:28,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:06:28,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99297835] [2023-08-04 08:06:28,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:06:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:06:28,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:06:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:06:28,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 667 [2023-08-04 08:06:28,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 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 08:06:28,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:28,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 667 [2023-08-04 08:06:28,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:06:28,541 INFO L124 PetriNetUnfolderBase]: 4272/6030 cut-off events. [2023-08-04 08:06:28,542 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-08-04 08:06:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12319 conditions, 6030 events. 4272/6030 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 25228 event pairs, 1990 based on Foata normal form. 0/3993 useless extension candidates. Maximal degree in co-relation 4892. Up to 5107 conditions per place. [2023-08-04 08:06:28,646 INFO L140 encePairwiseOnDemand]: 664/667 looper letters, 85 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-04 08:06:28,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 402 flow [2023-08-04 08:06:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:06:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:06:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2023-08-04 08:06:28,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892553723138431 [2023-08-04 08:06:28,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2023-08-04 08:06:28,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2023-08-04 08:06:28,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:06:28,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2023-08-04 08:06:28,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 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 08:06:28,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:28,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:28,655 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 182 flow. Second operand 3 states and 979 transitions. [2023-08-04 08:06:28,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 402 flow [2023-08-04 08:06:28,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:06:28,656 INFO L231 Difference]: Finished difference. Result has 59 places, 72 transitions, 190 flow [2023-08-04 08:06:28,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=72} [2023-08-04 08:06:28,657 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-08-04 08:06:28,657 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 72 transitions, 190 flow [2023-08-04 08:06:28,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 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 08:06:28,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:28,658 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] [2023-08-04 08:06:28,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 08:06:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:28,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:28,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1567931508, now seen corresponding path program 1 times [2023-08-04 08:06:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:28,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818216882] [2023-08-04 08:06:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:28,907 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 08:06:28,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:28,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818216882] [2023-08-04 08:06:28,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818216882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:06:28,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998010489] [2023-08-04 08:06:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:28,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:06:28,913 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 08:06:28,957 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 08:06:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:29,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:06:29,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:06:29,053 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 08:06:29,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:06:29,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998010489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:06:29,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:06:29,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:06:29,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113022042] [2023-08-04 08:06:29,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:06:29,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:06:29,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:06:29,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:06:29,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 667 [2023-08-04 08:06:29,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 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 08:06:29,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:29,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 667 [2023-08-04 08:06:29,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:06:29,273 INFO L124 PetriNetUnfolderBase]: 2381/3423 cut-off events. [2023-08-04 08:06:29,273 INFO L125 PetriNetUnfolderBase]: For 386/386 co-relation queries the response was YES. [2023-08-04 08:06:29,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7298 conditions, 3423 events. 2381/3423 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12688 event pairs, 1193 based on Foata normal form. 0/2401 useless extension candidates. Maximal degree in co-relation 2920. Up to 2901 conditions per place. [2023-08-04 08:06:29,285 INFO L140 encePairwiseOnDemand]: 664/667 looper letters, 86 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-04 08:06:29,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 412 flow [2023-08-04 08:06:29,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:06:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:06:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2023-08-04 08:06:29,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892553723138431 [2023-08-04 08:06:29,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2023-08-04 08:06:29,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2023-08-04 08:06:29,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:06:29,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2023-08-04 08:06:29,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 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 08:06:29,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:29,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:29,292 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 190 flow. Second operand 3 states and 979 transitions. [2023-08-04 08:06:29,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 412 flow [2023-08-04 08:06:29,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:06:29,296 INFO L231 Difference]: Finished difference. Result has 61 places, 73 transitions, 200 flow [2023-08-04 08:06:29,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=61, PETRI_TRANSITIONS=73} [2023-08-04 08:06:29,296 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2023-08-04 08:06:29,296 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 73 transitions, 200 flow [2023-08-04 08:06:29,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 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 08:06:29,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:29,297 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] [2023-08-04 08:06:29,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:06:29,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:29,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:29,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1619736523, now seen corresponding path program 1 times [2023-08-04 08:06:29,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:29,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712346275] [2023-08-04 08:06:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:29,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:29,571 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 08:06:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:29,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712346275] [2023-08-04 08:06:29,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712346275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:06:29,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877735969] [2023-08-04 08:06:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:06:29,586 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 08:06:29,587 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 08:06:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:29,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:06:29,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:06:29,680 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 08:06:29,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:06:29,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877735969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:06:29,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:06:29,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:06:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362838043] [2023-08-04 08:06:29,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:06:29,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:06:29,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:06:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:06:29,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 667 [2023-08-04 08:06:29,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 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 08:06:29,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:29,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 667 [2023-08-04 08:06:29,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:06:29,910 INFO L124 PetriNetUnfolderBase]: 2152/3040 cut-off events. [2023-08-04 08:06:29,911 INFO L125 PetriNetUnfolderBase]: For 301/301 co-relation queries the response was YES. [2023-08-04 08:06:29,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6598 conditions, 3040 events. 2152/3040 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10823 event pairs, 1239 based on Foata normal form. 0/2163 useless extension candidates. Maximal degree in co-relation 5234. Up to 2905 conditions per place. [2023-08-04 08:06:29,919 INFO L140 encePairwiseOnDemand]: 663/667 looper letters, 80 selfloop transitions, 2 changer transitions 3/89 dead transitions. [2023-08-04 08:06:29,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 402 flow [2023-08-04 08:06:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:06:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:06:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2023-08-04 08:06:29,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4877561219390305 [2023-08-04 08:06:29,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2023-08-04 08:06:29,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2023-08-04 08:06:29,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:06:29,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2023-08-04 08:06:29,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 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 08:06:29,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:29,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 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 08:06:29,927 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 200 flow. Second operand 3 states and 976 transitions. [2023-08-04 08:06:29,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 402 flow [2023-08-04 08:06:29,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:06:29,933 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 200 flow [2023-08-04 08:06:29,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 08:06:29,934 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-04 08:06:29,934 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 200 flow [2023-08-04 08:06:29,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 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 08:06:29,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:29,935 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, 1] [2023-08-04 08:06:29,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:06:30,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:30,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:30,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:30,141 INFO L85 PathProgramCache]: Analyzing trace with hash -359122881, now seen corresponding path program 1 times [2023-08-04 08:06:30,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:30,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350393820] [2023-08-04 08:06:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:30,190 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 08:06:30,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:30,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350393820] [2023-08-04 08:06:30,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350393820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:06:30,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665152889] [2023-08-04 08:06:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:06:30,192 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 08:06:30,194 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 08:06:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:30,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:06:30,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:06:30,321 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 08:06:30,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:06:30,335 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 08:06:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665152889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:06:30,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:06:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:06:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322802102] [2023-08-04 08:06:30,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:06:30,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:06:30,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:06:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:06:30,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 667 [2023-08-04 08:06:30,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 303.8) internal successors, (1519), 5 states have internal predecessors, (1519), 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 08:06:30,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:30,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 667 [2023-08-04 08:06:30,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:06:30,374 INFO L124 PetriNetUnfolderBase]: 15/32 cut-off events. [2023-08-04 08:06:30,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:06:30,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 32 events. 15/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 4/28 useless extension candidates. Maximal degree in co-relation 69. Up to 18 conditions per place. [2023-08-04 08:06:30,375 INFO L140 encePairwiseOnDemand]: 664/667 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 08:06:30,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 88 flow [2023-08-04 08:06:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:06:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:06:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1206 transitions. [2023-08-04 08:06:30,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452023988005997 [2023-08-04 08:06:30,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1206 transitions. [2023-08-04 08:06:30,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1206 transitions. [2023-08-04 08:06:30,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:06:30,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1206 transitions. [2023-08-04 08:06:30,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 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 08:06:30,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 667.0) internal successors, (3335), 5 states have internal predecessors, (3335), 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 08:06:30,383 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 667.0) internal successors, (3335), 5 states have internal predecessors, (3335), 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 08:06:30,383 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 200 flow. Second operand 4 states and 1206 transitions. [2023-08-04 08:06:30,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 88 flow [2023-08-04 08:06:30,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:06:30,384 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 08:06:30,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 08:06:30,385 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -37 predicate places. [2023-08-04 08:06:30,385 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 08:06:30,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 303.8) internal successors, (1519), 5 states have internal predecessors, (1519), 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 08:06:30,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:06:30,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:06:30,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:06:30,593 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:06:30,595 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:06:30,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:30,726 INFO L124 PetriNetUnfolderBase]: 179/1198 cut-off events. [2023-08-04 08:06:30,726 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:06:30,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 1198 events. 179/1198 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6337 event pairs, 0 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 666. Up to 16 conditions per place. [2023-08-04 08:06:30,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:30,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:30,739 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:06:30,739 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:30,740 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:30,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 335 transitions, 712 flow [2023-08-04 08:06:30,857 INFO L124 PetriNetUnfolderBase]: 179/1198 cut-off events. [2023-08-04 08:06:30,857 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:06:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 1198 events. 179/1198 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6337 event pairs, 0 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 666. Up to 16 conditions per place. [2023-08-04 08:06:30,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 14016 [2023-08-04 08:06:37,920 INFO L134 LiptonReduction]: Checked pairs total: 25805 [2023-08-04 08:06:37,920 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-08-04 08:06:37,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:06:37,925 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@770ff2d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:06:37,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:06:37,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:06:37,928 INFO L124 PetriNetUnfolderBase]: 8/42 cut-off events. [2023-08-04 08:06:37,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:06:37,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:37,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:06:37,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:06:37,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:37,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1746557825, now seen corresponding path program 1 times [2023-08-04 08:06:37,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:37,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757021700] [2023-08-04 08:06:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:37,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:06:37,955 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:06:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:06:38,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:06:38,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:06:38,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:06:38,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:06:38,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:06:38,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:06:38,031 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:06:38,033 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:06:38,033 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:06:38,033 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:06:38,063 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:06:38,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 395 transitions, 880 flow [2023-08-04 08:06:38,911 INFO L124 PetriNetUnfolderBase]: 1436/7769 cut-off events. [2023-08-04 08:06:38,911 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:06:38,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 7769 events. 1436/7769 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 71137 event pairs, 11 based on Foata normal form. 0/6577 useless extension candidates. Maximal degree in co-relation 4336. Up to 192 conditions per place. [2023-08-04 08:06:38,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 345 places, 395 transitions, 880 flow [2023-08-04 08:06:39,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 395 transitions, 880 flow [2023-08-04 08:06:39,040 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:06:39,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 395 transitions, 880 flow [2023-08-04 08:06:39,040 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 395 transitions, 880 flow [2023-08-04 08:06:39,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 395 transitions, 880 flow [2023-08-04 08:06:39,899 INFO L124 PetriNetUnfolderBase]: 1436/7769 cut-off events. [2023-08-04 08:06:39,899 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:06:39,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 7769 events. 1436/7769 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 71137 event pairs, 11 based on Foata normal form. 0/6577 useless extension candidates. Maximal degree in co-relation 4336. Up to 192 conditions per place. [2023-08-04 08:06:40,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 34656 [2023-08-04 08:06:47,399 INFO L134 LiptonReduction]: Checked pairs total: 113112 [2023-08-04 08:06:47,400 INFO L136 LiptonReduction]: Total number of compositions: 369 [2023-08-04 08:06:47,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:06:47,401 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;@770ff2d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:06:47,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:06:47,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:06:47,406 INFO L124 PetriNetUnfolderBase]: 20/128 cut-off events. [2023-08-04 08:06:47,406 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-04 08:06:47,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:06:47,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:06:47,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:06:47,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:06:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash 422492785, now seen corresponding path program 1 times [2023-08-04 08:06:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:06:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462794844] [2023-08-04 08:06:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:06:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:06:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:06:47,432 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 08:06:47,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:06:47,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462794844] [2023-08-04 08:06:47,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462794844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:06:47,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:06:47,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:06:47,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612097048] [2023-08-04 08:06:47,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:06:47,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:06:47,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:06:47,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:06:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:06:47,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 764 [2023-08-04 08:06:47,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 117 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 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 08:06:47,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:06:47,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 764 [2023-08-04 08:06:47,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand