/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe010_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:22:22,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:22:22,707 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:22:22,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:22:22,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:22:22,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:22:22,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:22:22,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:22:22,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:22:22,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:22:22,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:22:22,743 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:22:22,744 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:22:22,745 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:22:22,745 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:22:22,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:22:22,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:22:22,745 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:22:22,745 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:22:22,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:22:22,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:22:22,746 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:22:22,746 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:22:22,746 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:22:22,747 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:22:22,747 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:22:22,747 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:22:22,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:22:22,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:22:22,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:22:22,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:22:22,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:22:22,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:22:22,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:22:22,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:22:22,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:22:22,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:22:22,750 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:22:22,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:22:22,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:22:22,750 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:22:22,750 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:22:22,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:22:22,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:22:22,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:22:22,973 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:22:22,973 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:22:22,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe010_tso_bound2.i [2023-08-04 00:22:23,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:22:24,122 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:22:24,122 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe010_tso_bound2.i [2023-08-04 00:22:24,131 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f148a7d6d/78406b090a704c6c98cd851d37ed027c/FLAG862465ced [2023-08-04 00:22:24,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f148a7d6d/78406b090a704c6c98cd851d37ed027c [2023-08-04 00:22:24,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:22:24,533 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:22:24,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:22:24,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:22:24,536 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:22:24,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b022349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24, skipping insertion in model container [2023-08-04 00:22:24,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,564 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:22:24,660 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe010_tso_bound2.i[945,958] [2023-08-04 00:22:24,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:22:24,760 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:22:24,771 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe010_tso_bound2.i[945,958] [2023-08-04 00:22:24,791 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:22:24,793 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:22:24,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:22:24,839 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:22:24,839 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:22:24,844 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:22:24,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24 WrapperNode [2023-08-04 00:22:24,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:22:24,845 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:22:24,845 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:22:24,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:22:24,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,858 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,872 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-08-04 00:22:24,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:22:24,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:22:24,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:22:24,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:22:24,879 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,885 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,889 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:22:24,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:22:24,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:22:24,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:22:24,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (1/1) ... [2023-08-04 00:22:24,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:22:24,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:24,930 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 00:22:24,944 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 00:22:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:22:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:22:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:22:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:22:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:22:24,969 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 00:22:25,071 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:22:25,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:22:25,205 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:22:25,209 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:22:25,209 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 00:22:25,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:22:25 BoogieIcfgContainer [2023-08-04 00:22:25,210 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:22:25,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:22:25,212 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:22:25,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:22:25,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:22:24" (1/3) ... [2023-08-04 00:22:25,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3110762c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:22:25, skipping insertion in model container [2023-08-04 00:22:25,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:22:24" (2/3) ... [2023-08-04 00:22:25,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3110762c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:22:25, skipping insertion in model container [2023-08-04 00:22:25,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:22:25" (3/3) ... [2023-08-04 00:22:25,215 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe010_tso_bound2.i [2023-08-04 00:22:25,222 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:22:25,229 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:22:25,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:22:25,229 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:22:25,284 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:22:25,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 172 flow [2023-08-04 00:22:25,364 INFO L124 PetriNetUnfolderBase]: 14/192 cut-off events. [2023-08-04 00:22:25,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:22:25,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 192 events. 14/192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 556 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 109. Up to 8 conditions per place. [2023-08-04 00:22:25,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 172 flow [2023-08-04 00:22:25,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 55 transitions, 120 flow [2023-08-04 00:22:25,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:22:25,380 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 55 transitions, 120 flow [2023-08-04 00:22:25,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 55 transitions, 120 flow [2023-08-04 00:22:25,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 55 transitions, 120 flow [2023-08-04 00:22:25,395 INFO L124 PetriNetUnfolderBase]: 2/88 cut-off events. [2023-08-04 00:22:25,395 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:22:25,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 88 events. 2/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-08-04 00:22:25,395 INFO L119 LiptonReduction]: Number of co-enabled transitions 492 [2023-08-04 00:22:26,543 INFO L134 LiptonReduction]: Checked pairs total: 930 [2023-08-04 00:22:26,543 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-04 00:22:26,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:22:26,556 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;@1e406347, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:22:26,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 00:22:26,559 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:22:26,559 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 00:22:26,559 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:22:26,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:26,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:22:26,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:22:26,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:26,563 INFO L85 PathProgramCache]: Analyzing trace with hash 264208829, now seen corresponding path program 1 times [2023-08-04 00:22:26,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:26,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710471105] [2023-08-04 00:22:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:26,715 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 00:22:26,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:26,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710471105] [2023-08-04 00:22:26,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710471105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:26,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:22:26,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:22:26,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605458318] [2023-08-04 00:22:26,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:26,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:22:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:26,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:22:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:22:26,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 125 [2023-08-04 00:22:26,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 00:22:26,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:26,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 125 [2023-08-04 00:22:26,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:26,809 INFO L124 PetriNetUnfolderBase]: 24/68 cut-off events. [2023-08-04 00:22:26,809 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:22:26,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 68 events. 24/68 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 197 event pairs, 14 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 125. Up to 52 conditions per place. [2023-08-04 00:22:26,811 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 12 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-04 00:22:26,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 74 flow [2023-08-04 00:22:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-04 00:22:26,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-08-04 00:22:26,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-04 00:22:26,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-04 00:22:26,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:26,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-04 00:22:26,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 00:22:26,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 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 00:22:26,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 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 00:22:26,842 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 40 flow. Second operand 3 states and 225 transitions. [2023-08-04 00:22:26,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 74 flow [2023-08-04 00:22:26,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:22:26,844 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 48 flow [2023-08-04 00:22:26,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-04 00:22:26,858 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-04 00:22:26,858 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 48 flow [2023-08-04 00:22:26,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 00:22:26,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:26,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:22:26,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:22:26,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:22:26,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash -402174245, now seen corresponding path program 1 times [2023-08-04 00:22:26,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:26,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687892997] [2023-08-04 00:22:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:26,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:22:26,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:22:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:22:26,897 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:22:26,897 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:22:26,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 00:22:26,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 00:22:26,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:22:26,900 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:22:26,901 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 00:22:26,902 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:22:26,902 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:22:26,916 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:22:26,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 95 transitions, 214 flow [2023-08-04 00:22:26,952 INFO L124 PetriNetUnfolderBase]: 30/411 cut-off events. [2023-08-04 00:22:26,953 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 00:22:26,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 411 events. 30/411 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1733 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 295. Up to 18 conditions per place. [2023-08-04 00:22:26,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 95 transitions, 214 flow [2023-08-04 00:22:26,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 69 transitions, 162 flow [2023-08-04 00:22:26,954 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:22:26,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 69 transitions, 162 flow [2023-08-04 00:22:26,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 69 transitions, 162 flow [2023-08-04 00:22:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 69 transitions, 162 flow [2023-08-04 00:22:26,968 INFO L124 PetriNetUnfolderBase]: 3/177 cut-off events. [2023-08-04 00:22:26,968 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 00:22:26,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 177 events. 3/177 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 438 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 139. Up to 9 conditions per place. [2023-08-04 00:22:26,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-04 00:22:27,990 INFO L134 LiptonReduction]: Checked pairs total: 3024 [2023-08-04 00:22:27,990 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-08-04 00:22:27,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:22:27,992 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;@1e406347, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:22:27,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 00:22:27,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:22:27,998 INFO L124 PetriNetUnfolderBase]: 0/32 cut-off events. [2023-08-04 00:22:27,998 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 00:22:27,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:27,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-04 00:22:27,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:22:27,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2111390560, now seen corresponding path program 1 times [2023-08-04 00:22:27,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:27,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351658866] [2023-08-04 00:22:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:28,036 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 00:22:28,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:28,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351658866] [2023-08-04 00:22:28,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351658866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:28,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:22:28,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:22:28,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948092529] [2023-08-04 00:22:28,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:28,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:22:28,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:28,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:22:28,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:22:28,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 143 [2023-08-04 00:22:28,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 00:22:28,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:28,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 143 [2023-08-04 00:22:28,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:28,146 INFO L124 PetriNetUnfolderBase]: 624/1162 cut-off events. [2023-08-04 00:22:28,146 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 00:22:28,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1162 events. 624/1162 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6593 event pairs, 402 based on Foata normal form. 0/1134 useless extension candidates. Maximal degree in co-relation 664. Up to 958 conditions per place. [2023-08-04 00:22:28,155 INFO L140 encePairwiseOnDemand]: 140/143 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 00:22:28,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 124 flow [2023-08-04 00:22:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-08-04 00:22:28,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6247086247086248 [2023-08-04 00:22:28,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-08-04 00:22:28,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-08-04 00:22:28,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:28,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-08-04 00:22:28,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 00:22:28,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 00:22:28,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 00:22:28,165 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 268 transitions. [2023-08-04 00:22:28,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 124 flow [2023-08-04 00:22:28,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 120 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 00:22:28,167 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 82 flow [2023-08-04 00:22:28,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 00:22:28,168 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 00:22:28,168 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 82 flow [2023-08-04 00:22:28,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 00:22:28,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:28,169 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:22:28,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:22:28,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:22:28,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 297174288, now seen corresponding path program 1 times [2023-08-04 00:22:28,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721541875] [2023-08-04 00:22:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:28,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:22:28,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:28,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721541875] [2023-08-04 00:22:28,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721541875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:28,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273383136] [2023-08-04 00:22:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:28,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:28,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:28,252 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 00:22:28,271 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 00:22:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:28,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:22:28,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:22:28,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:22:28,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273383136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:28,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:22:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:22:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399036049] [2023-08-04 00:22:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:22:28,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:22:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:22:28,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 143 [2023-08-04 00:22:28,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 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 00:22:28,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:28,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 143 [2023-08-04 00:22:28,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:28,501 INFO L124 PetriNetUnfolderBase]: 612/1129 cut-off events. [2023-08-04 00:22:28,501 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 00:22:28,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2285 conditions, 1129 events. 612/1129 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6338 event pairs, 240 based on Foata normal form. 9/1125 useless extension candidates. Maximal degree in co-relation 823. Up to 911 conditions per place. [2023-08-04 00:22:28,507 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 22 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-04 00:22:28,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 148 flow [2023-08-04 00:22:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:22:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:22:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 432 transitions. [2023-08-04 00:22:28,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041958041958042 [2023-08-04 00:22:28,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 432 transitions. [2023-08-04 00:22:28,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 432 transitions. [2023-08-04 00:22:28,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:28,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 432 transitions. [2023-08-04 00:22:28,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 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 00:22:28,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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 00:22:28,511 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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 00:22:28,511 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 82 flow. Second operand 5 states and 432 transitions. [2023-08-04 00:22:28,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 148 flow [2023-08-04 00:22:28,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:22:28,512 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 96 flow [2023-08-04 00:22:28,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-04 00:22:28,513 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-04 00:22:28,513 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 96 flow [2023-08-04 00:22:28,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 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 00:22:28,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:28,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:28,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:22:28,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:28,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:22:28,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:28,719 INFO L85 PathProgramCache]: Analyzing trace with hash 847063076, now seen corresponding path program 1 times [2023-08-04 00:22:28,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:28,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226442520] [2023-08-04 00:22:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:28,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:28,768 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 00:22:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:28,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226442520] [2023-08-04 00:22:28,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226442520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:28,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213805023] [2023-08-04 00:22:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:28,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:28,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:28,778 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 00:22:28,780 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 00:22:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:28,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:22:28,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:28,846 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 00:22:28,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:22:28,859 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 00:22:28,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213805023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:22:28,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:22:28,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:22:28,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014431133] [2023-08-04 00:22:28,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:22:28,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:22:28,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:22:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:22:28,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 143 [2023-08-04 00:22:28,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 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 00:22:28,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:28,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 143 [2023-08-04 00:22:28,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:28,939 INFO L124 PetriNetUnfolderBase]: 502/899 cut-off events. [2023-08-04 00:22:28,940 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-04 00:22:28,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 899 events. 502/899 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4632 event pairs, 180 based on Foata normal form. 3/892 useless extension candidates. Maximal degree in co-relation 651. Up to 727 conditions per place. [2023-08-04 00:22:28,944 INFO L140 encePairwiseOnDemand]: 140/143 looper letters, 22 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-08-04 00:22:28,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 154 flow [2023-08-04 00:22:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:22:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:22:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2023-08-04 00:22:28,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118881118881119 [2023-08-04 00:22:28,945 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2023-08-04 00:22:28,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2023-08-04 00:22:28,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:28,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2023-08-04 00:22:28,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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 00:22:28,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 00:22:28,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 00:22:28,947 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 96 flow. Second operand 4 states and 350 transitions. [2023-08-04 00:22:28,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 154 flow [2023-08-04 00:22:28,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 149 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:22:28,949 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 89 flow [2023-08-04 00:22:28,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-08-04 00:22:28,949 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-04 00:22:28,949 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 89 flow [2023-08-04 00:22:28,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 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 00:22:28,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:28,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:28,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:22:29,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:29,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:22:29,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1204741225, now seen corresponding path program 1 times [2023-08-04 00:22:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:29,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012571496] [2023-08-04 00:22:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:22:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012571496] [2023-08-04 00:22:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012571496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172321128] [2023-08-04 00:22:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:29,231 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 00:22:29,234 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 00:22:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:29,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:22:29,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:22:29,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:22:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172321128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:29,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:22:29,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:22:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307317217] [2023-08-04 00:22:29,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:29,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:22:29,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:22:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:22:29,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 143 [2023-08-04 00:22:29,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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 00:22:29,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:29,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 143 [2023-08-04 00:22:29,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:29,392 INFO L124 PetriNetUnfolderBase]: 286/544 cut-off events. [2023-08-04 00:22:29,392 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 00:22:29,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 544 events. 286/544 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2546 event pairs, 22 based on Foata normal form. 81/615 useless extension candidates. Maximal degree in co-relation 552. Up to 324 conditions per place. [2023-08-04 00:22:29,394 INFO L140 encePairwiseOnDemand]: 141/143 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-04 00:22:29,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 161 flow [2023-08-04 00:22:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:22:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:22:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2023-08-04 00:22:29,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6223776223776224 [2023-08-04 00:22:29,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 356 transitions. [2023-08-04 00:22:29,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 356 transitions. [2023-08-04 00:22:29,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:29,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 356 transitions. [2023-08-04 00:22:29,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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 00:22:29,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 00:22:29,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 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 00:22:29,398 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 89 flow. Second operand 4 states and 356 transitions. [2023-08-04 00:22:29,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 161 flow [2023-08-04 00:22:29,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:22:29,401 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-04 00:22:29,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-04 00:22:29,403 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 00:22:29,403 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-04 00:22:29,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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 00:22:29,403 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 00:22:29,404 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 00:22:29,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:22:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:29,609 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 00:22:29,610 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 00:22:29,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 95 transitions, 214 flow [2023-08-04 00:22:29,633 INFO L124 PetriNetUnfolderBase]: 30/411 cut-off events. [2023-08-04 00:22:29,634 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 00:22:29,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 411 events. 30/411 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1733 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 295. Up to 18 conditions per place. [2023-08-04 00:22:29,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 95 transitions, 214 flow [2023-08-04 00:22:29,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 83 transitions, 182 flow [2023-08-04 00:22:29,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:22:29,635 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 83 transitions, 182 flow [2023-08-04 00:22:29,635 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 83 transitions, 182 flow [2023-08-04 00:22:29,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 83 transitions, 182 flow [2023-08-04 00:22:29,647 INFO L124 PetriNetUnfolderBase]: 21/317 cut-off events. [2023-08-04 00:22:29,647 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 00:22:29,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 317 events. 21/317 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1164 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 232. Up to 18 conditions per place. [2023-08-04 00:22:29,650 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-08-04 00:22:30,932 INFO L134 LiptonReduction]: Checked pairs total: 4248 [2023-08-04 00:22:30,932 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-04 00:22:30,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:22:30,933 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;@1e406347, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:22:30,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:22:30,934 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:22:30,934 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-04 00:22:30,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:22:30,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:30,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 00:22:30,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:30,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 15345743, now seen corresponding path program 1 times [2023-08-04 00:22:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:30,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767947993] [2023-08-04 00:22:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:30,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:30,952 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 00:22:30,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:30,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767947993] [2023-08-04 00:22:30,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767947993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:30,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:22:30,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:22:30,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136740883] [2023-08-04 00:22:30,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:30,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:22:30,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:22:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:22:30,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 160 [2023-08-04 00:22:30,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 00:22:30,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:30,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 160 [2023-08-04 00:22:30,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:31,109 INFO L124 PetriNetUnfolderBase]: 1674/2803 cut-off events. [2023-08-04 00:22:31,109 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-04 00:22:31,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 2803 events. 1674/2803 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16470 event pairs, 1140 based on Foata normal form. 0/2610 useless extension candidates. Maximal degree in co-relation 1555. Up to 2476 conditions per place. [2023-08-04 00:22:31,119 INFO L140 encePairwiseOnDemand]: 156/160 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 00:22:31,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 124 flow [2023-08-04 00:22:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2023-08-04 00:22:31,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-08-04 00:22:31,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2023-08-04 00:22:31,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2023-08-04 00:22:31,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:31,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2023-08-04 00:22:31,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 00:22:31,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:31,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:31,123 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 70 flow. Second operand 3 states and 272 transitions. [2023-08-04 00:22:31,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 124 flow [2023-08-04 00:22:31,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:22:31,123 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 80 flow [2023-08-04 00:22:31,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-04 00:22:31,124 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 00:22:31,124 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 80 flow [2023-08-04 00:22:31,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 00:22:31,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:31,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:31,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 00:22:31,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:31,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash -50966479, now seen corresponding path program 1 times [2023-08-04 00:22:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:31,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143084246] [2023-08-04 00:22:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:31,149 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 00:22:31,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143084246] [2023-08-04 00:22:31,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143084246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:31,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096952976] [2023-08-04 00:22:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:31,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:31,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:31,177 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 00:22:31,178 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 00:22:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:31,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:22:31,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:31,233 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 00:22:31,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:22:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096952976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:31,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:22:31,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:22:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817913452] [2023-08-04 00:22:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:31,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:22:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:22:31,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:22:31,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 160 [2023-08-04 00:22:31,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 00:22:31,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:31,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 160 [2023-08-04 00:22:31,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:31,382 INFO L124 PetriNetUnfolderBase]: 1646/2693 cut-off events. [2023-08-04 00:22:31,383 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 00:22:31,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 2693 events. 1646/2693 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15398 event pairs, 1120 based on Foata normal form. 0/2536 useless extension candidates. Maximal degree in co-relation 5265. Up to 2299 conditions per place. [2023-08-04 00:22:31,394 INFO L140 encePairwiseOnDemand]: 157/160 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 00:22:31,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 154 flow [2023-08-04 00:22:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-04 00:22:31,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2023-08-04 00:22:31,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-04 00:22:31,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-04 00:22:31,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:31,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-04 00:22:31,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 00:22:31,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:31,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:31,397 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 80 flow. Second operand 3 states and 275 transitions. [2023-08-04 00:22:31,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 154 flow [2023-08-04 00:22:31,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:22:31,398 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 90 flow [2023-08-04 00:22:31,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 00:22:31,399 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-04 00:22:31,399 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 90 flow [2023-08-04 00:22:31,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 00:22:31,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:31,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:31,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:22:31,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:31,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:31,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:31,605 INFO L85 PathProgramCache]: Analyzing trace with hash -390007899, now seen corresponding path program 1 times [2023-08-04 00:22:31,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:31,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473777113] [2023-08-04 00:22:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:31,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:31,628 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 00:22:31,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:31,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473777113] [2023-08-04 00:22:31,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473777113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:31,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225536345] [2023-08-04 00:22:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:31,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:31,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:31,633 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 00:22:31,648 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 00:22:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:32,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:22:32,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:32,077 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 00:22:32,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:22:32,093 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 00:22:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225536345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:22:32,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:22:32,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:22:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326958562] [2023-08-04 00:22:32,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:22:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:22:32,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:22:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:22:32,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 160 [2023-08-04 00:22:32,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:32,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:32,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 160 [2023-08-04 00:22:32,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:32,262 INFO L124 PetriNetUnfolderBase]: 1336/2141 cut-off events. [2023-08-04 00:22:32,262 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-04 00:22:32,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4466 conditions, 2141 events. 1336/2141 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11340 event pairs, 564 based on Foata normal form. 3/2134 useless extension candidates. Maximal degree in co-relation 1599. Up to 1882 conditions per place. [2023-08-04 00:22:32,269 INFO L140 encePairwiseOnDemand]: 156/160 looper letters, 26 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2023-08-04 00:22:32,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 166 flow [2023-08-04 00:22:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:22:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:22:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2023-08-04 00:22:32,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2023-08-04 00:22:32,270 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2023-08-04 00:22:32,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2023-08-04 00:22:32,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:32,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2023-08-04 00:22:32,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 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 00:22:32,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 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 00:22:32,272 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 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 00:22:32,272 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 90 flow. Second operand 4 states and 354 transitions. [2023-08-04 00:22:32,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 166 flow [2023-08-04 00:22:32,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:22:32,273 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 102 flow [2023-08-04 00:22:32,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2023-08-04 00:22:32,274 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2023-08-04 00:22:32,274 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 102 flow [2023-08-04 00:22:32,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:32,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:32,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:32,283 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 00:22:32,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:32,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:32,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:32,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1583975078, now seen corresponding path program 1 times [2023-08-04 00:22:32,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:32,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709204052] [2023-08-04 00:22:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:32,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:22:32,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:32,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709204052] [2023-08-04 00:22:32,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709204052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:32,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782598154] [2023-08-04 00:22:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:32,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:32,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:32,533 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 00:22:32,559 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 00:22:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:32,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:22:32,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:22:32,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:22:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:22:32,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782598154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:22:32,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:22:32,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:22:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192980014] [2023-08-04 00:22:32,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:22:32,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:22:32,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:22:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:22:32,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 160 [2023-08-04 00:22:32,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:32,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:32,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 160 [2023-08-04 00:22:32,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:32,770 INFO L124 PetriNetUnfolderBase]: 1216/1861 cut-off events. [2023-08-04 00:22:32,770 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 00:22:32,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1861 events. 1216/1861 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9167 event pairs, 400 based on Foata normal form. 27/1878 useless extension candidates. Maximal degree in co-relation 1421. Up to 943 conditions per place. [2023-08-04 00:22:32,778 INFO L140 encePairwiseOnDemand]: 156/160 looper letters, 34 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2023-08-04 00:22:32,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 210 flow [2023-08-04 00:22:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:22:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:22:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2023-08-04 00:22:32,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2023-08-04 00:22:32,780 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 362 transitions. [2023-08-04 00:22:32,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 362 transitions. [2023-08-04 00:22:32,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:32,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 362 transitions. [2023-08-04 00:22:32,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 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 00:22:32,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 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 00:22:32,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 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 00:22:32,783 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 102 flow. Second operand 4 states and 362 transitions. [2023-08-04 00:22:32,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 210 flow [2023-08-04 00:22:32,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 203 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:22:32,785 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 109 flow [2023-08-04 00:22:32,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 00:22:32,786 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 00:22:32,786 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 109 flow [2023-08-04 00:22:32,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:32,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:32,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:32,792 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 00:22:32,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:32,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:32,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1870265573, now seen corresponding path program 1 times [2023-08-04 00:22:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:32,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279959031] [2023-08-04 00:22:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:32,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:22:33,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:33,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279959031] [2023-08-04 00:22:33,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279959031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:33,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:22:33,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:22:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426885080] [2023-08-04 00:22:33,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:33,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:22:33,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:22:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:22:33,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 160 [2023-08-04 00:22:33,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 00:22:33,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:33,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 160 [2023-08-04 00:22:33,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:33,157 INFO L124 PetriNetUnfolderBase]: 970/1579 cut-off events. [2023-08-04 00:22:33,158 INFO L125 PetriNetUnfolderBase]: For 1054/1054 co-relation queries the response was YES. [2023-08-04 00:22:33,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3673 conditions, 1579 events. 970/1579 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8137 event pairs, 244 based on Foata normal form. 9/1587 useless extension candidates. Maximal degree in co-relation 1297. Up to 1195 conditions per place. [2023-08-04 00:22:33,163 INFO L140 encePairwiseOnDemand]: 156/160 looper letters, 30 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-04 00:22:33,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 219 flow [2023-08-04 00:22:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-04 00:22:33,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-04 00:22:33,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-04 00:22:33,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-04 00:22:33,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:33,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-04 00:22:33,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 00:22:33,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:33,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:33,166 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 109 flow. Second operand 3 states and 280 transitions. [2023-08-04 00:22:33,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 219 flow [2023-08-04 00:22:33,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 207 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:22:33,167 INFO L231 Difference]: Finished difference. Result has 46 places, 30 transitions, 121 flow [2023-08-04 00:22:33,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=46, PETRI_TRANSITIONS=30} [2023-08-04 00:22:33,168 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 00:22:33,168 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 30 transitions, 121 flow [2023-08-04 00:22:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 00:22:33,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:33,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 00:22:33,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:33,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2143658505, now seen corresponding path program 1 times [2023-08-04 00:22:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:33,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96487163] [2023-08-04 00:22:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:22:33,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:33,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96487163] [2023-08-04 00:22:33,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96487163] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:33,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:22:33,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:22:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065561530] [2023-08-04 00:22:33,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:33,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:22:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:22:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:22:33,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 160 [2023-08-04 00:22:33,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 30 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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 00:22:33,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:33,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 160 [2023-08-04 00:22:33,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:33,484 INFO L124 PetriNetUnfolderBase]: 2526/3871 cut-off events. [2023-08-04 00:22:33,484 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-04 00:22:33,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9595 conditions, 3871 events. 2526/3871 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22142 event pairs, 400 based on Foata normal form. 128/3981 useless extension candidates. Maximal degree in co-relation 7333. Up to 1737 conditions per place. [2023-08-04 00:22:33,501 INFO L140 encePairwiseOnDemand]: 154/160 looper letters, 53 selfloop transitions, 7 changer transitions 2/66 dead transitions. [2023-08-04 00:22:33,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 388 flow [2023-08-04 00:22:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:22:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:22:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2023-08-04 00:22:33,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5859375 [2023-08-04 00:22:33,503 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2023-08-04 00:22:33,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2023-08-04 00:22:33,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:33,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2023-08-04 00:22:33,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 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 00:22:33,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 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 00:22:33,505 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 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 00:22:33,505 INFO L175 Difference]: Start difference. First operand has 46 places, 30 transitions, 121 flow. Second operand 4 states and 375 transitions. [2023-08-04 00:22:33,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 388 flow [2023-08-04 00:22:33,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:22:33,507 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 177 flow [2023-08-04 00:22:33,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-08-04 00:22:33,508 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2023-08-04 00:22:33,508 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 177 flow [2023-08-04 00:22:33,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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 00:22:33,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:33,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 00:22:33,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:33,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1270141114, now seen corresponding path program 1 times [2023-08-04 00:22:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823238476] [2023-08-04 00:22:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:22:33,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823238476] [2023-08-04 00:22:33,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823238476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:22:33,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:22:33,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:22:33,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988739229] [2023-08-04 00:22:33,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:22:33,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:22:33,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:33,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:22:33,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:22:33,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 160 [2023-08-04 00:22:33,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 00:22:33,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:33,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 160 [2023-08-04 00:22:33,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:33,715 INFO L124 PetriNetUnfolderBase]: 1570/2453 cut-off events. [2023-08-04 00:22:33,715 INFO L125 PetriNetUnfolderBase]: For 2682/2707 co-relation queries the response was YES. [2023-08-04 00:22:33,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6986 conditions, 2453 events. 1570/2453 cut-off events. For 2682/2707 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12694 event pairs, 346 based on Foata normal form. 43/2436 useless extension candidates. Maximal degree in co-relation 5112. Up to 2014 conditions per place. [2023-08-04 00:22:33,725 INFO L140 encePairwiseOnDemand]: 154/160 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-08-04 00:22:33,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 385 flow [2023-08-04 00:22:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-04 00:22:33,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-04 00:22:33,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-04 00:22:33,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-04 00:22:33,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:33,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-04 00:22:33,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 00:22:33,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:33,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 00:22:33,728 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 177 flow. Second operand 3 states and 280 transitions. [2023-08-04 00:22:33,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 385 flow [2023-08-04 00:22:33,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:22:33,730 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 205 flow [2023-08-04 00:22:33,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-04 00:22:33,731 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-08-04 00:22:33,731 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 205 flow [2023-08-04 00:22:33,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 00:22:33,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:33,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:33,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 00:22:33,731 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:33,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -767107645, now seen corresponding path program 1 times [2023-08-04 00:22:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:33,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885148299] [2023-08-04 00:22:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:33,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 00:22:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885148299] [2023-08-04 00:22:33,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885148299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962185267] [2023-08-04 00:22:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:33,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:33,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:22:33,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:22:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:33,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 00:22:33,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:22:34,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:22:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:22:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962185267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:22:34,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:22:34,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2023-08-04 00:22:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66575814] [2023-08-04 00:22:34,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:22:34,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 00:22:34,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 00:22:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-08-04 00:22:34,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 160 [2023-08-04 00:22:34,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 205 flow. Second operand has 14 states, 14 states have (on average 73.35714285714286) internal successors, (1027), 14 states have internal predecessors, (1027), 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 00:22:34,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:34,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 160 [2023-08-04 00:22:34,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:35,015 INFO L124 PetriNetUnfolderBase]: 6364/9290 cut-off events. [2023-08-04 00:22:35,015 INFO L125 PetriNetUnfolderBase]: For 11923/11923 co-relation queries the response was YES. [2023-08-04 00:22:35,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29114 conditions, 9290 events. 6364/9290 cut-off events. For 11923/11923 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 54603 event pairs, 121 based on Foata normal form. 530/9816 useless extension candidates. Maximal degree in co-relation 29008. Up to 3439 conditions per place. [2023-08-04 00:22:35,053 INFO L140 encePairwiseOnDemand]: 145/160 looper letters, 160 selfloop transitions, 134 changer transitions 12/308 dead transitions. [2023-08-04 00:22:35,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 308 transitions, 2031 flow [2023-08-04 00:22:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-04 00:22:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-04 00:22:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1513 transitions. [2023-08-04 00:22:35,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253472222222222 [2023-08-04 00:22:35,057 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1513 transitions. [2023-08-04 00:22:35,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1513 transitions. [2023-08-04 00:22:35,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:35,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1513 transitions. [2023-08-04 00:22:35,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.05555555555556) internal successors, (1513), 18 states have internal predecessors, (1513), 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 00:22:35,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 160.0) internal successors, (3040), 19 states have internal predecessors, (3040), 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 00:22:35,063 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 160.0) internal successors, (3040), 19 states have internal predecessors, (3040), 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 00:22:35,063 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 205 flow. Second operand 18 states and 1513 transitions. [2023-08-04 00:22:35,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 308 transitions, 2031 flow [2023-08-04 00:22:35,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 308 transitions, 2010 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:22:35,071 INFO L231 Difference]: Finished difference. Result has 78 places, 197 transitions, 1361 flow [2023-08-04 00:22:35,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1361, PETRI_PLACES=78, PETRI_TRANSITIONS=197} [2023-08-04 00:22:35,072 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-08-04 00:22:35,072 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 197 transitions, 1361 flow [2023-08-04 00:22:35,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.35714285714286) internal successors, (1027), 14 states have internal predecessors, (1027), 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 00:22:35,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:35,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:35,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 00:22:35,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:35,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:35,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:35,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1270349363, now seen corresponding path program 1 times [2023-08-04 00:22:35,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:35,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552335196] [2023-08-04 00:22:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:35,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:22:35,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:22:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:22:35,310 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:22:35,311 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:22:35,311 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 00:22:35,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 00:22:35,311 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:35,311 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-04 00:22:35,313 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 00:22:35,313 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 00:22:35,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 12:22:35 BasicIcfg [2023-08-04 00:22:35,341 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 00:22:35,341 INFO L158 Benchmark]: Toolchain (without parser) took 10808.50ms. Allocated memory was 371.2MB in the beginning and 635.4MB in the end (delta: 264.2MB). Free memory was 334.5MB in the beginning and 589.5MB in the end (delta: -255.0MB). Peak memory consumption was 9.4MB. Max. memory is 16.0GB. [2023-08-04 00:22:35,341 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 371.2MB. Free memory is still 328.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 00:22:35,341 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.46ms. Allocated memory is still 371.2MB. Free memory was 334.1MB in the beginning and 314.1MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 00:22:35,341 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.22ms. Allocated memory is still 371.2MB. Free memory was 314.1MB in the beginning and 311.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:22:35,341 INFO L158 Benchmark]: Boogie Preprocessor took 17.54ms. Allocated memory is still 371.2MB. Free memory was 311.9MB in the beginning and 310.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:22:35,342 INFO L158 Benchmark]: RCFGBuilder took 319.62ms. Allocated memory is still 371.2MB. Free memory was 310.3MB in the beginning and 297.3MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 00:22:35,342 INFO L158 Benchmark]: TraceAbstraction took 10128.88ms. Allocated memory was 371.2MB in the beginning and 635.4MB in the end (delta: 264.2MB). Free memory was 296.5MB in the beginning and 589.5MB in the end (delta: -293.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 00:22:35,343 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 371.2MB. Free memory is still 328.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 311.46ms. Allocated memory is still 371.2MB. Free memory was 334.1MB in the beginning and 314.1MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.22ms. Allocated memory is still 371.2MB. Free memory was 314.1MB in the beginning and 311.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.54ms. Allocated memory is still 371.2MB. Free memory was 311.9MB in the beginning and 310.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 319.62ms. Allocated memory is still 371.2MB. Free memory was 310.3MB in the beginning and 297.3MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 10128.88ms. Allocated memory was 371.2MB in the beginning and 635.4MB in the end (delta: 264.2MB). Free memory was 296.5MB in the beginning and 589.5MB in the end (delta: -293.0MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 492 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 44 TotalNumberOfCompositions, 930 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 556, independent: 508, independent conditional: 0, independent unconditional: 508, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 262, independent: 256, independent conditional: 0, independent unconditional: 256, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 556, independent: 252, independent conditional: 0, independent unconditional: 252, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 262, unknown conditional: 0, unknown unconditional: 262] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.0s, 77 PlacesBefore, 34 PlacesAfterwards, 69 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 48 TotalNumberOfCompositions, 3024 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1650, independent: 1555, independent conditional: 0, independent unconditional: 1555, dependent: 95, dependent conditional: 0, dependent unconditional: 95, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 678, independent: 661, independent conditional: 0, independent unconditional: 661, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1650, independent: 894, independent conditional: 0, independent unconditional: 894, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 678, unknown conditional: 0, unknown unconditional: 678] , Statistics on independence cache: Total cache size (in pairs): 99, Positive cache size: 90, Positive conditional cache size: 0, Positive unconditional cache size: 90, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 89 PlacesBefore, 35 PlacesAfterwards, 83 TransitionsBefore, 27 TransitionsAfterwards, 2016 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 65 TotalNumberOfCompositions, 4248 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2068, independent: 1963, independent conditional: 0, independent unconditional: 1963, dependent: 105, dependent conditional: 0, dependent unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1048, independent: 1014, independent conditional: 0, independent unconditional: 1014, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2068, independent: 949, independent conditional: 0, independent unconditional: 949, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 1048, unknown conditional: 0, unknown unconditional: 1048] , Statistics on independence cache: Total cache size (in pairs): 85, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p1_EAX = 0; [L711] 0 _Bool main$tmp_guard0; [L712] 0 _Bool main$tmp_guard1; [L714] 0 int x = 0; [L716] 0 int y = 0; [L758] 0 pthread_t t2021[2]; [L759] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2021={5:0}, x=0, y=0] [L759] COND TRUE 0 asdf<2 [L759] FCALL, FORK 0 pthread_create(&t2021[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2021[asdf], ((void *)0), P0, ((void *)0))=-3, t2021={5:0}, x=0, y=0] [L759] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2021={5:0}, x=0, y=0] [L759] COND TRUE 0 asdf<2 [L759] FCALL, FORK 0 pthread_create(&t2021[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2021[asdf], ((void *)0), P0, ((void *)0))=-2, t2021={5:0}, x=0, y=0] [L720] 1 y = 2 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=2] [L720] 2 y = 2 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=2] [L759] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2021={5:0}, x=0, y=2] [L759] COND FALSE 0 !(asdf<2) [L760] 0 pthread_t t2022[2]; [L761] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2021={5:0}, t2022={3:0}, x=0, y=2] [L761] COND TRUE 0 asdf<2 [L761] FCALL, FORK 0 pthread_create(&t2022[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2022[asdf], ((void *)0), P1, ((void *)0))=-1, t2021={5:0}, t2022={3:0}, x=0, y=2] [L761] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2021={5:0}, t2022={3:0}, x=0, y=2] [L761] COND TRUE 0 asdf<2 [L761] FCALL, FORK 0 pthread_create(&t2022[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2022[asdf], ((void *)0), P1, ((void *)0))=0, t2021={5:0}, t2022={3:0}, x=0, y=2] [L761] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2021={5:0}, t2022={3:0}, x=0, y=2] [L723] 1 x = 1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=1, y=2] [L728] 1 __unbuffered_cnt = __unbuffered_cnt + 1 [L730] 1 return 0; [L735] 3 __unbuffered_p1_EAX = x VAL [\result={0:0}, __unbuffered_cnt=1, __unbuffered_p1_EAX=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=1, y=2] [L728] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L730] 2 return 0; [L761] COND FALSE 0 !(asdf<2) [L763] 0 main$tmp_guard0 = __unbuffered_cnt == 2 [L765] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) [L765] RET 0 assume_abort_if_not(main$tmp_guard0) [L769] 0 main$tmp_guard1 = !(y == 2 && __unbuffered_p1_EAX == 1) [L771] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p1_EAX=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=1, y=2] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 92 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32 IncrementalHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 32 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 106 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 129 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 92 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 221 IncrementalHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 7 mSDtfsCounter, 221 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 188 SizeOfPredicates, 0 NumberOfNonLiveVariables, 358 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 50/61 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 106 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.7s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 349 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 276 mSDsluCounter, 149 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 94 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 904 IncrementalHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 55 mSDtfsCounter, 904 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1361occurred in iteration=8, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 225 ConstructedInterpolants, 0 QuantifiedInterpolants, 806 SizeOfPredicates, 1 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 77/101 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 00:22:35,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...