/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:39:11,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:39:11,714 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:39:11,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:39:11,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:39:11,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:39:11,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:39:11,740 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:39:11,741 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:39:11,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:39:11,744 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:39:11,744 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:39:11,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:39:11,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:39:11,746 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:39:11,746 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:39:11,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:39:11,747 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:39:11,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:39:11,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:39:11,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:39:11,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:39:11,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:39:11,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:39:11,748 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:39:11,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:39:11,749 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:39:11,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:39:11,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:39:11,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:39:11,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:39:11,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:39:11,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:39:11,751 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:39:11,752 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:39:11,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:39:11,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:39:11,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:39:11,933 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:39:11,934 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:39:11,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c [2023-08-04 09:39:12,870 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:39:13,008 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:39:13,009 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c [2023-08-04 09:39:13,014 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44945773/76da973b10f64c0c95e6f2d822cec4e6/FLAGba9366e20 [2023-08-04 09:39:13,023 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44945773/76da973b10f64c0c95e6f2d822cec4e6 [2023-08-04 09:39:13,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:39:13,025 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:39:13,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:39:13,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:39:13,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:39:13,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7239af5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13, skipping insertion in model container [2023-08-04 09:39:13,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,044 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:39:13,198 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c[2858,2871] [2023-08-04 09:39:13,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:39:13,213 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:39:13,231 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c[2858,2871] [2023-08-04 09:39:13,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:39:13,239 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:39:13,239 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:39:13,244 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:39:13,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13 WrapperNode [2023-08-04 09:39:13,244 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:39:13,245 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:39:13,245 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:39:13,245 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:39:13,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,255 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,269 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 190 [2023-08-04 09:39:13,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:39:13,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:39:13,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:39:13,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:39:13,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,281 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,284 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,285 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,287 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:39:13,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:39:13,287 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:39:13,287 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:39:13,288 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (1/1) ... [2023-08-04 09:39:13,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:39:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:13,310 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 09:39:13,326 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 09:39:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:39:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:39:13,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:39:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:39:13,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:39:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:39:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:39:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:39:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:39:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:39:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:39:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:39:13,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:39:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:39:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:39:13,340 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 09:39:13,412 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:39:13,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:39:13,642 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:39:13,705 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:39:13,705 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 09:39:13,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:39:13 BoogieIcfgContainer [2023-08-04 09:39:13,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:39:13,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:39:13,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:39:13,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:39:13,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:39:13" (1/3) ... [2023-08-04 09:39:13,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0a1fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:39:13, skipping insertion in model container [2023-08-04 09:39:13,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:13" (2/3) ... [2023-08-04 09:39:13,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0a1fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:39:13, skipping insertion in model container [2023-08-04 09:39:13,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:39:13" (3/3) ... [2023-08-04 09:39:13,718 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-queue-add-2.wvr_bound2.c [2023-08-04 09:39:13,723 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:39:13,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:39:13,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:39:13,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:39:13,771 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:39:13,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:13,891 INFO L124 PetriNetUnfolderBase]: 39/298 cut-off events. [2023-08-04 09:39:13,891 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:13,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 298 events. 39/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 863 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-04 09:39:13,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:13,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:13,911 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:13,919 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:13,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:13,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:13,968 INFO L124 PetriNetUnfolderBase]: 39/298 cut-off events. [2023-08-04 09:39:13,969 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:13,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 298 events. 39/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 863 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-04 09:39:13,974 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2023-08-04 09:39:17,939 INFO L134 LiptonReduction]: Checked pairs total: 3920 [2023-08-04 09:39:17,940 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-04 09:39:17,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:39:17,952 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;@73fbb1cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:17,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:39:17,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:17,958 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-04 09:39:17,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:17,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:17,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:39:17,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:17,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash -455251299, now seen corresponding path program 1 times [2023-08-04 09:39:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:17,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905850793] [2023-08-04 09:39:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:17,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:18,173 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 09:39:18,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:18,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905850793] [2023-08-04 09:39:18,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905850793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:18,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:39:18,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:39:18,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467781343] [2023-08-04 09:39:18,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:18,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:39:18,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 306 [2023-08-04 09:39:18,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 34 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 09:39:18,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:18,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 306 [2023-08-04 09:39:18,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:18,307 INFO L124 PetriNetUnfolderBase]: 294/487 cut-off events. [2023-08-04 09:39:18,307 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 09:39:18,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 487 events. 294/487 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1949 event pairs, 122 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 804. Up to 456 conditions per place. [2023-08-04 09:39:18,310 INFO L140 encePairwiseOnDemand]: 301/306 looper letters, 26 selfloop transitions, 2 changer transitions 3/35 dead transitions. [2023-08-04 09:39:18,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 150 flow [2023-08-04 09:39:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-04 09:39:18,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662309368191721 [2023-08-04 09:39:18,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-04 09:39:18,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-04 09:39:18,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:18,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-04 09:39:18,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 09:39:18,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:18,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:18,338 INFO L175 Difference]: Start difference. First operand has 31 places, 34 transitions, 90 flow. Second operand 3 states and 428 transitions. [2023-08-04 09:39:18,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 150 flow [2023-08-04 09:39:18,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 150 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:39:18,342 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 86 flow [2023-08-04 09:39:18,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-04 09:39:18,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-04 09:39:18,346 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 86 flow [2023-08-04 09:39:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 09:39:18,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:18,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:39:18,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:18,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1294599051, now seen corresponding path program 1 times [2023-08-04 09:39:18,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:18,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290455986] [2023-08-04 09:39:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:18,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:18,444 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 09:39:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290455986] [2023-08-04 09:39:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290455986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780580308] [2023-08-04 09:39:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:18,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:18,448 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 09:39:18,468 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 09:39:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:18,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:18,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:18,530 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 09:39:18,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:18,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780580308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:18,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:18,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188699556] [2023-08-04 09:39:18,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:18,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:18,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 306 [2023-08-04 09:39:18,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 09:39:18,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:18,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 306 [2023-08-04 09:39:18,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:18,611 INFO L124 PetriNetUnfolderBase]: 291/477 cut-off events. [2023-08-04 09:39:18,611 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 09:39:18,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 477 events. 291/477 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1762 event pairs, 149 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 793. Up to 420 conditions per place. [2023-08-04 09:39:18,614 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 29 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2023-08-04 09:39:18,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 162 flow [2023-08-04 09:39:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-04 09:39:18,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2023-08-04 09:39:18,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-04 09:39:18,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-04 09:39:18,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:18,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-04 09:39:18,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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 09:39:18,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:18,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:18,620 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 86 flow. Second operand 3 states and 429 transitions. [2023-08-04 09:39:18,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 162 flow [2023-08-04 09:39:18,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:39:18,622 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 84 flow [2023-08-04 09:39:18,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-08-04 09:39:18,623 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-08-04 09:39:18,623 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 84 flow [2023-08-04 09:39:18,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 09:39:18,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:18,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:18,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:39:18,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:18,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:18,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash -704373005, now seen corresponding path program 1 times [2023-08-04 09:39:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:18,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948522349] [2023-08-04 09:39:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:18,906 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 09:39:18,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:18,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948522349] [2023-08-04 09:39:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948522349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736563856] [2023-08-04 09:39:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:18,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:18,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:18,908 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 09:39:18,908 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 09:39:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:18,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:18,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:18,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:18,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736563856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:18,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:18,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991456159] [2023-08-04 09:39:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:18,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:18,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 306 [2023-08-04 09:39:18,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 09:39:18,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:18,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 306 [2023-08-04 09:39:18,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:19,042 INFO L124 PetriNetUnfolderBase]: 192/328 cut-off events. [2023-08-04 09:39:19,043 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 09:39:19,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 328 events. 192/328 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1124 event pairs, 69 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 228. Up to 221 conditions per place. [2023-08-04 09:39:19,044 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-04 09:39:19,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 176 flow [2023-08-04 09:39:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-04 09:39:19,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-08-04 09:39:19,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-04 09:39:19,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-04 09:39:19,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:19,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-04 09:39:19,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 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 09:39:19,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:19,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:19,048 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 84 flow. Second operand 3 states and 432 transitions. [2023-08-04 09:39:19,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 176 flow [2023-08-04 09:39:19,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:19,050 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 92 flow [2023-08-04 09:39:19,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-08-04 09:39:19,050 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-04 09:39:19,050 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 92 flow [2023-08-04 09:39:19,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 09:39:19,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:19,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:19,059 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 09:39:19,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:39:19,258 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:19,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash 100279896, now seen corresponding path program 1 times [2023-08-04 09:39:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:19,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088426191] [2023-08-04 09:39:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:19,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:19,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088426191] [2023-08-04 09:39:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088426191] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819257051] [2023-08-04 09:39:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:19,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:19,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:19,341 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 09:39:19,342 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 09:39:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:19,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:19,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:19,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:19,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819257051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:19,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:19,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:39:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513201594] [2023-08-04 09:39:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:19,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 306 [2023-08-04 09:39:19,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 09:39:19,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:19,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 306 [2023-08-04 09:39:19,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:19,474 INFO L124 PetriNetUnfolderBase]: 183/314 cut-off events. [2023-08-04 09:39:19,475 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-04 09:39:19,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 314 events. 183/314 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1030 event pairs, 94 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 292. Up to 268 conditions per place. [2023-08-04 09:39:19,476 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 29 selfloop transitions, 2 changer transitions 2/37 dead transitions. [2023-08-04 09:39:19,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 170 flow [2023-08-04 09:39:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-04 09:39:19,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2023-08-04 09:39:19,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-04 09:39:19,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-04 09:39:19,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:19,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-04 09:39:19,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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 09:39:19,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:19,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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 09:39:19,480 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 92 flow. Second operand 3 states and 429 transitions. [2023-08-04 09:39:19,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 170 flow [2023-08-04 09:39:19,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:19,482 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 94 flow [2023-08-04 09:39:19,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-04 09:39:19,482 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-04 09:39:19,482 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 94 flow [2023-08-04 09:39:19,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 09:39:19,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:19,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:19,489 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 09:39:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:19,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:19,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1565217075, now seen corresponding path program 1 times [2023-08-04 09:39:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:19,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214530737] [2023-08-04 09:39:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214530737] [2023-08-04 09:39:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214530737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156101828] [2023-08-04 09:39:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:19,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:19,736 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 09:39:19,738 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 09:39:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:19,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:39:19,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:19,836 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:19,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156101828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:19,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:19,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 09:39:19,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128416289] [2023-08-04 09:39:19,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:19,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:39:19,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:39:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:39:19,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 306 [2023-08-04 09:39:19,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 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 09:39:19,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:19,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 306 [2023-08-04 09:39:19,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:19,952 INFO L124 PetriNetUnfolderBase]: 183/325 cut-off events. [2023-08-04 09:39:19,952 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:39:19,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 325 events. 183/325 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1091 event pairs, 104 based on Foata normal form. 14/262 useless extension candidates. Maximal degree in co-relation 629. Up to 298 conditions per place. [2023-08-04 09:39:19,954 INFO L140 encePairwiseOnDemand]: 300/306 looper letters, 25 selfloop transitions, 2 changer transitions 10/41 dead transitions. [2023-08-04 09:39:19,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 204 flow [2023-08-04 09:39:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 560 transitions. [2023-08-04 09:39:19,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2023-08-04 09:39:19,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 560 transitions. [2023-08-04 09:39:19,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 560 transitions. [2023-08-04 09:39:19,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:19,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 560 transitions. [2023-08-04 09:39:19,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 09:39:19,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 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 09:39:19,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 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 09:39:19,961 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 94 flow. Second operand 4 states and 560 transitions. [2023-08-04 09:39:19,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 204 flow [2023-08-04 09:39:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:19,963 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 108 flow [2023-08-04 09:39:19,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-04 09:39:19,964 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-08-04 09:39:19,964 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 108 flow [2023-08-04 09:39:19,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 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 09:39:19,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:19,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:19,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 09:39:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:20,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:20,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -179693357, now seen corresponding path program 1 times [2023-08-04 09:39:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668560052] [2023-08-04 09:39:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:20,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:20,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668560052] [2023-08-04 09:39:20,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668560052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:20,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650175657] [2023-08-04 09:39:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:20,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:20,260 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 09:39:20,262 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 09:39:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:20,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:20,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:20,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:20,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650175657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:20,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:20,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:20,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683569383] [2023-08-04 09:39:20,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:20,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:20,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:20,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:20,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 306 [2023-08-04 09:39:20,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 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 09:39:20,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:20,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 306 [2023-08-04 09:39:20,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:20,402 INFO L124 PetriNetUnfolderBase]: 9/22 cut-off events. [2023-08-04 09:39:20,402 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 09:39:20,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 22 events. 9/22 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 1 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 61. Up to 13 conditions per place. [2023-08-04 09:39:20,405 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 09:39:20,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 72 flow [2023-08-04 09:39:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2023-08-04 09:39:20,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2023-08-04 09:39:20,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2023-08-04 09:39:20,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2023-08-04 09:39:20,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:20,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2023-08-04 09:39:20,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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 09:39:20,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 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 09:39:20,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 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 09:39:20,412 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 108 flow. Second operand 4 states and 536 transitions. [2023-08-04 09:39:20,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 72 flow [2023-08-04 09:39:20,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 58 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-04 09:39:20,413 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 09:39:20,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 09:39:20,415 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -13 predicate places. [2023-08-04 09:39:20,415 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 09:39:20,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 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 09:39:20,417 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:39:20,427 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 09:39:20,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:20,624 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 09:39:20,625 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:39:20,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:20,663 INFO L124 PetriNetUnfolderBase]: 39/298 cut-off events. [2023-08-04 09:39:20,663 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:20,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 298 events. 39/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 863 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-04 09:39:20,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:20,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:20,665 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:20,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:20,666 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:20,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 09:39:20,693 INFO L124 PetriNetUnfolderBase]: 39/298 cut-off events. [2023-08-04 09:39:20,694 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:20,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 298 events. 39/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 863 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-04 09:39:20,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2023-08-04 09:39:23,973 INFO L134 LiptonReduction]: Checked pairs total: 3938 [2023-08-04 09:39:23,973 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-04 09:39:23,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:39:23,975 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;@73fbb1cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:23,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:39:23,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:23,977 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-08-04 09:39:23,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:23,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:23,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:39:23,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:39:23,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash 404536278, now seen corresponding path program 1 times [2023-08-04 09:39:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:23,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662003033] [2023-08-04 09:39:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:23,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:24,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:39:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:24,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:39:24,026 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:39:24,026 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:39:24,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:39:24,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:39:24,026 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:39:24,027 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:39:24,027 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:39:24,027 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:39:24,043 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:39:24,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 09:39:24,109 INFO L124 PetriNetUnfolderBase]: 144/874 cut-off events. [2023-08-04 09:39:24,109 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:39:24,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 874 events. 144/874 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4230 event pairs, 2 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 531. Up to 32 conditions per place. [2023-08-04 09:39:24,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 09:39:24,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 418 flow [2023-08-04 09:39:24,114 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:24,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 418 flow [2023-08-04 09:39:24,114 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 418 flow [2023-08-04 09:39:24,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 09:39:24,167 INFO L124 PetriNetUnfolderBase]: 144/874 cut-off events. [2023-08-04 09:39:24,167 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:39:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 874 events. 144/874 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4230 event pairs, 2 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 531. Up to 32 conditions per place. [2023-08-04 09:39:24,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 6392 [2023-08-04 09:39:27,567 INFO L134 LiptonReduction]: Checked pairs total: 11789 [2023-08-04 09:39:27,567 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-04 09:39:27,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:39:27,568 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;@73fbb1cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:27,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:39:27,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:27,570 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-04 09:39:27,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:27,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:27,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:39:27,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:27,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2014365572, now seen corresponding path program 1 times [2023-08-04 09:39:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:27,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901989613] [2023-08-04 09:39:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:27,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:27,589 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 09:39:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901989613] [2023-08-04 09:39:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901989613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:27,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:39:27,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:39:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638606729] [2023-08-04 09:39:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:39:27,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 347 [2023-08-04 09:39:27,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 09:39:27,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:27,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 347 [2023-08-04 09:39:27,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:28,768 INFO L124 PetriNetUnfolderBase]: 11997/15785 cut-off events. [2023-08-04 09:39:28,769 INFO L125 PetriNetUnfolderBase]: For 1536/1536 co-relation queries the response was YES. [2023-08-04 09:39:28,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32026 conditions, 15785 events. 11997/15785 cut-off events. For 1536/1536 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 77323 event pairs, 6048 based on Foata normal form. 0/10167 useless extension candidates. Maximal degree in co-relation 9640. Up to 15230 conditions per place. [2023-08-04 09:39:28,842 INFO L140 encePairwiseOnDemand]: 341/347 looper letters, 39 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2023-08-04 09:39:28,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 232 flow [2023-08-04 09:39:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-04 09:39:28,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668587896253602 [2023-08-04 09:39:28,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-04 09:39:28,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-04 09:39:28,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:28,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-04 09:39:28,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 09:39:28,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:28,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:28,847 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 148 flow. Second operand 3 states and 486 transitions. [2023-08-04 09:39:28,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 232 flow [2023-08-04 09:39:28,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:39:28,851 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 142 flow [2023-08-04 09:39:28,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-04 09:39:28,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 09:39:28,852 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 142 flow [2023-08-04 09:39:28,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 09:39:28,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:28,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:39:28,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:28,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1413699807, now seen corresponding path program 1 times [2023-08-04 09:39:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203849025] [2023-08-04 09:39:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:28,887 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 09:39:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203849025] [2023-08-04 09:39:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203849025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918404316] [2023-08-04 09:39:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:28,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:28,890 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 09:39:28,892 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 09:39:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:28,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:28,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:28,948 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 09:39:28,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918404316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:28,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:28,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494591298] [2023-08-04 09:39:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:28,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:28,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 347 [2023-08-04 09:39:28,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 09:39:28,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:28,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 347 [2023-08-04 09:39:28,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:30,094 INFO L124 PetriNetUnfolderBase]: 12017/15844 cut-off events. [2023-08-04 09:39:30,094 INFO L125 PetriNetUnfolderBase]: For 1385/1385 co-relation queries the response was YES. [2023-08-04 09:39:30,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32034 conditions, 15844 events. 12017/15844 cut-off events. For 1385/1385 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 78416 event pairs, 5554 based on Foata normal form. 0/10208 useless extension candidates. Maximal degree in co-relation 19591. Up to 15049 conditions per place. [2023-08-04 09:39:30,163 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 09:39:30,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 254 flow [2023-08-04 09:39:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-04 09:39:30,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687800192122959 [2023-08-04 09:39:30,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-04 09:39:30,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-04 09:39:30,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:30,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-04 09:39:30,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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 09:39:30,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:30,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:30,167 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 142 flow. Second operand 3 states and 488 transitions. [2023-08-04 09:39:30,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 254 flow [2023-08-04 09:39:30,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:39:30,172 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 146 flow [2023-08-04 09:39:30,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-08-04 09:39:30,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-04 09:39:30,174 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 146 flow [2023-08-04 09:39:30,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 09:39:30,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:30,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:30,181 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 09:39:30,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:30,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:30,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash 126025941, now seen corresponding path program 1 times [2023-08-04 09:39:30,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:30,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513523150] [2023-08-04 09:39:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:30,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:30,407 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 09:39:30,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:30,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513523150] [2023-08-04 09:39:30,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513523150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:30,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639907309] [2023-08-04 09:39:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:30,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:30,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:30,408 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 09:39:30,410 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 09:39:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:30,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:30,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:30,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:30,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639907309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:30,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:30,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408797325] [2023-08-04 09:39:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:30,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:30,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 347 [2023-08-04 09:39:30,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 09:39:30,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:30,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 347 [2023-08-04 09:39:30,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:31,411 INFO L124 PetriNetUnfolderBase]: 9989/13414 cut-off events. [2023-08-04 09:39:31,412 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2023-08-04 09:39:31,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27570 conditions, 13414 events. 9989/13414 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 67604 event pairs, 4120 based on Foata normal form. 0/9071 useless extension candidates. Maximal degree in co-relation 9363. Up to 9443 conditions per place. [2023-08-04 09:39:31,458 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 09:39:31,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 298 flow [2023-08-04 09:39:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 09:39:31,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755043227665706 [2023-08-04 09:39:31,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 09:39:31,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 09:39:31,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:31,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 09:39:31,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 09:39:31,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:31,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:31,462 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 146 flow. Second operand 3 states and 495 transitions. [2023-08-04 09:39:31,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 298 flow [2023-08-04 09:39:31,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:31,465 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 156 flow [2023-08-04 09:39:31,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-04 09:39:31,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 09:39:31,466 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 156 flow [2023-08-04 09:39:31,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 09:39:31,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:31,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:31,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 09:39:31,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:31,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:31,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:31,673 INFO L85 PathProgramCache]: Analyzing trace with hash 700793798, now seen corresponding path program 1 times [2023-08-04 09:39:31,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:31,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482003872] [2023-08-04 09:39:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:31,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:31,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482003872] [2023-08-04 09:39:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482003872] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:31,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904667265] [2023-08-04 09:39:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:31,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:31,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:31,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:39:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:31,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:31,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:31,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:31,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904667265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:31,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:39:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882277788] [2023-08-04 09:39:31,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:31,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 347 [2023-08-04 09:39:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 09:39:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 347 [2023-08-04 09:39:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:32,706 INFO L124 PetriNetUnfolderBase]: 9747/13178 cut-off events. [2023-08-04 09:39:32,706 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-04 09:39:32,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28176 conditions, 13178 events. 9747/13178 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 65605 event pairs, 4688 based on Foata normal form. 0/9307 useless extension candidates. Maximal degree in co-relation 9971. Up to 10244 conditions per place. [2023-08-04 09:39:32,753 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 54 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 09:39:32,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 310 flow [2023-08-04 09:39:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 09:39:32,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755043227665706 [2023-08-04 09:39:32,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 09:39:32,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 09:39:32,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:32,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 09:39:32,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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 09:39:32,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:32,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 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 09:39:32,758 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 156 flow. Second operand 3 states and 495 transitions. [2023-08-04 09:39:32,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 310 flow [2023-08-04 09:39:32,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:32,764 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 166 flow [2023-08-04 09:39:32,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-08-04 09:39:32,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 09:39:32,765 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 166 flow [2023-08-04 09:39:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 09:39:32,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:32,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:32,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:39:32,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:32,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1122237867, now seen corresponding path program 1 times [2023-08-04 09:39:32,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:32,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547451137] [2023-08-04 09:39:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:32,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:33,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547451137] [2023-08-04 09:39:33,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547451137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723580129] [2023-08-04 09:39:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:33,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:33,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:39:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:33,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:39:33,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:33,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:33,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723580129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:33,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:33,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 09:39:33,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066640280] [2023-08-04 09:39:33,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:39:33,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:39:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:39:33,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 347 [2023-08-04 09:39:33,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 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 09:39:33,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:33,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 347 [2023-08-04 09:39:33,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:33,940 INFO L124 PetriNetUnfolderBase]: 9747/13223 cut-off events. [2023-08-04 09:39:33,940 INFO L125 PetriNetUnfolderBase]: For 2291/2291 co-relation queries the response was YES. [2023-08-04 09:39:33,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28585 conditions, 13223 events. 9747/13223 cut-off events. For 2291/2291 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 66004 event pairs, 5761 based on Foata normal form. 75/9515 useless extension candidates. Maximal degree in co-relation 20808. Up to 12668 conditions per place. [2023-08-04 09:39:33,987 INFO L140 encePairwiseOnDemand]: 338/347 looper letters, 40 selfloop transitions, 2 changer transitions 14/64 dead transitions. [2023-08-04 09:39:33,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 340 flow [2023-08-04 09:39:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-04 09:39:33,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45821325648414984 [2023-08-04 09:39:33,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-04 09:39:33,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-04 09:39:33,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:33,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-04 09:39:33,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 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 09:39:33,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:33,992 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:33,992 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 166 flow. Second operand 4 states and 636 transitions. [2023-08-04 09:39:33,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 340 flow [2023-08-04 09:39:34,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:34,018 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 188 flow [2023-08-04 09:39:34,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-04 09:39:34,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2023-08-04 09:39:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 188 flow [2023-08-04 09:39:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 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 09:39:34,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:34,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:34,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:34,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:34,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1802788809, now seen corresponding path program 1 times [2023-08-04 09:39:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:34,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501520567] [2023-08-04 09:39:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:34,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:34,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501520567] [2023-08-04 09:39:34,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501520567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:34,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500654500] [2023-08-04 09:39:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:34,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:34,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:34,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:34,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:39:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:34,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:34,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:34,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500654500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:34,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664815720] [2023-08-04 09:39:34,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:34,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2023-08-04 09:39:34,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 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 09:39:34,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:34,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2023-08-04 09:39:34,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:35,107 INFO L124 PetriNetUnfolderBase]: 8756/11779 cut-off events. [2023-08-04 09:39:35,108 INFO L125 PetriNetUnfolderBase]: For 5377/5377 co-relation queries the response was YES. [2023-08-04 09:39:35,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32132 conditions, 11779 events. 8756/11779 cut-off events. For 5377/5377 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 57135 event pairs, 3340 based on Foata normal form. 3/8330 useless extension candidates. Maximal degree in co-relation 32112. Up to 11278 conditions per place. [2023-08-04 09:39:35,154 INFO L140 encePairwiseOnDemand]: 343/347 looper letters, 46 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 09:39:35,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 316 flow [2023-08-04 09:39:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 631 transitions. [2023-08-04 09:39:35,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546109510086455 [2023-08-04 09:39:35,155 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 631 transitions. [2023-08-04 09:39:35,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 631 transitions. [2023-08-04 09:39:35,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:35,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 631 transitions. [2023-08-04 09:39:35,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 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 09:39:35,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:35,158 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:35,159 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 188 flow. Second operand 4 states and 631 transitions. [2023-08-04 09:39:35,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 316 flow [2023-08-04 09:39:35,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 312 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:35,171 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 198 flow [2023-08-04 09:39:35,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-04 09:39:35,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-08-04 09:39:35,171 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 198 flow [2023-08-04 09:39:35,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 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 09:39:35,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:35,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:35,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:35,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:39:35,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:35,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash -947764272, now seen corresponding path program 1 times [2023-08-04 09:39:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:35,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752401085] [2023-08-04 09:39:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:39:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752401085] [2023-08-04 09:39:35,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752401085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96429675] [2023-08-04 09:39:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:35,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:35,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:35,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:39:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:35,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 09:39:35,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:35,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:35,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96429675] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:35,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:35,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-04 09:39:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826411610] [2023-08-04 09:39:35,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:35,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 09:39:35,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:35,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 09:39:35,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-04 09:39:35,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-04 09:39:35,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 198 flow. Second operand has 11 states, 11 states have (on average 140.1818181818182) internal successors, (1542), 11 states have internal predecessors, (1542), 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 09:39:35,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:35,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-04 09:39:35,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:37,021 INFO L124 PetriNetUnfolderBase]: 9910/14045 cut-off events. [2023-08-04 09:39:37,022 INFO L125 PetriNetUnfolderBase]: For 7426/7426 co-relation queries the response was YES. [2023-08-04 09:39:37,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37737 conditions, 14045 events. 9910/14045 cut-off events. For 7426/7426 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 77419 event pairs, 3052 based on Foata normal form. 1483/11877 useless extension candidates. Maximal degree in co-relation 30802. Up to 8982 conditions per place. [2023-08-04 09:39:37,087 INFO L140 encePairwiseOnDemand]: 334/347 looper letters, 106 selfloop transitions, 30 changer transitions 3/147 dead transitions. [2023-08-04 09:39:37,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 147 transitions, 858 flow [2023-08-04 09:39:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 09:39:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 09:39:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1779 transitions. [2023-08-04 09:39:37,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272334293948127 [2023-08-04 09:39:37,094 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1779 transitions. [2023-08-04 09:39:37,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1779 transitions. [2023-08-04 09:39:37,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:37,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1779 transitions. [2023-08-04 09:39:37,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 148.25) internal successors, (1779), 12 states have internal predecessors, (1779), 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 09:39:37,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 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 09:39:37,104 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 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 09:39:37,104 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 198 flow. Second operand 12 states and 1779 transitions. [2023-08-04 09:39:37,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 147 transitions, 858 flow [2023-08-04 09:39:37,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 147 transitions, 835 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-04 09:39:37,134 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 490 flow [2023-08-04 09:39:37,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=490, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2023-08-04 09:39:37,135 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2023-08-04 09:39:37,135 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 490 flow [2023-08-04 09:39:37,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 140.1818181818182) internal successors, (1542), 11 states have internal predecessors, (1542), 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 09:39:37,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:37,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:37,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:37,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:39:37,340 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:37,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash -993932490, now seen corresponding path program 1 times [2023-08-04 09:39:37,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:37,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006554608] [2023-08-04 09:39:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:37,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:39:37,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:37,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006554608] [2023-08-04 09:39:37,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006554608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:37,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413446958] [2023-08-04 09:39:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:37,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:37,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:37,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:39:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:37,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:37,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:39:37,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:39:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413446958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:37,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:37,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:37,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257762989] [2023-08-04 09:39:37,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:37,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:37,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2023-08-04 09:39:37,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 490 flow. Second operand has 5 states, 5 states have (on average 152.2) internal successors, (761), 5 states have internal predecessors, (761), 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 09:39:37,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:37,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2023-08-04 09:39:37,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:38,251 INFO L124 PetriNetUnfolderBase]: 6762/9704 cut-off events. [2023-08-04 09:39:38,251 INFO L125 PetriNetUnfolderBase]: For 57864/57864 co-relation queries the response was YES. [2023-08-04 09:39:38,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51213 conditions, 9704 events. 6762/9704 cut-off events. For 57864/57864 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 50894 event pairs, 1377 based on Foata normal form. 240/7393 useless extension candidates. Maximal degree in co-relation 47299. Up to 5216 conditions per place. [2023-08-04 09:39:38,309 INFO L140 encePairwiseOnDemand]: 343/347 looper letters, 80 selfloop transitions, 4 changer transitions 15/107 dead transitions. [2023-08-04 09:39:38,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 937 flow [2023-08-04 09:39:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-04 09:39:38,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675792507204611 [2023-08-04 09:39:38,312 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-04 09:39:38,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-04 09:39:38,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:38,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-04 09:39:38,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 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 09:39:38,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:38,316 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:38,316 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 490 flow. Second operand 4 states and 649 transitions. [2023-08-04 09:39:38,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 937 flow [2023-08-04 09:39:38,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 867 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-04 09:39:38,346 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 387 flow [2023-08-04 09:39:38,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=387, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-04 09:39:38,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2023-08-04 09:39:38,347 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 387 flow [2023-08-04 09:39:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.2) internal successors, (761), 5 states have internal predecessors, (761), 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 09:39:38,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:38,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:38,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:38,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:39:38,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:38,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1969494100, now seen corresponding path program 1 times [2023-08-04 09:39:38,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:38,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971594652] [2023-08-04 09:39:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:38,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:39:38,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971594652] [2023-08-04 09:39:38,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971594652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439464149] [2023-08-04 09:39:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:38,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:38,598 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:38,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:39:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:38,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:38,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:39:38,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:39:38,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439464149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:38,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:38,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:39:38,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816245420] [2023-08-04 09:39:38,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:38,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:38,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:38,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:38,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:38,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2023-08-04 09:39:38,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 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 09:39:38,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:38,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2023-08-04 09:39:38,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:39,470 INFO L124 PetriNetUnfolderBase]: 6297/8863 cut-off events. [2023-08-04 09:39:39,470 INFO L125 PetriNetUnfolderBase]: For 58817/58817 co-relation queries the response was YES. [2023-08-04 09:39:39,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49324 conditions, 8863 events. 6297/8863 cut-off events. For 58817/58817 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 43906 event pairs, 3539 based on Foata normal form. 17/6480 useless extension candidates. Maximal degree in co-relation 45481. Up to 7639 conditions per place. [2023-08-04 09:39:39,518 INFO L140 encePairwiseOnDemand]: 343/347 looper letters, 65 selfloop transitions, 3 changer transitions 15/91 dead transitions. [2023-08-04 09:39:39,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 753 flow [2023-08-04 09:39:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-04 09:39:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675792507204611 [2023-08-04 09:39:39,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-04 09:39:39,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-04 09:39:39,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:39,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-04 09:39:39,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 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 09:39:39,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:39,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 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 09:39:39,522 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 387 flow. Second operand 4 states and 649 transitions. [2023-08-04 09:39:39,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 753 flow [2023-08-04 09:39:39,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 713 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:39,546 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 286 flow [2023-08-04 09:39:39,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2023-08-04 09:39:39,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2023-08-04 09:39:39,546 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 286 flow [2023-08-04 09:39:39,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 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 09:39:39,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:39,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:39,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:39,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 09:39:39,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:39,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 412485408, now seen corresponding path program 1 times [2023-08-04 09:39:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209099533] [2023-08-04 09:39:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:39,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:39:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209099533] [2023-08-04 09:39:40,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209099533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130792715] [2023-08-04 09:39:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:40,219 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:40,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:39:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:40,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-04 09:39:40,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:39:40,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:40,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130792715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:40,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:40,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-08-04 09:39:40,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430140581] [2023-08-04 09:39:40,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:40,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 09:39:40,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 09:39:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-04 09:39:40,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2023-08-04 09:39:40,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 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 09:39:40,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:40,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2023-08-04 09:39:40,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:41,825 INFO L124 PetriNetUnfolderBase]: 10552/14233 cut-off events. [2023-08-04 09:39:41,826 INFO L125 PetriNetUnfolderBase]: For 60841/60901 co-relation queries the response was YES. [2023-08-04 09:39:41,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69793 conditions, 14233 events. 10552/14233 cut-off events. For 60841/60901 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 72383 event pairs, 2123 based on Foata normal form. 1/10213 useless extension candidates. Maximal degree in co-relation 69750. Up to 7317 conditions per place. [2023-08-04 09:39:41,919 INFO L140 encePairwiseOnDemand]: 339/347 looper letters, 131 selfloop transitions, 11 changer transitions 1/150 dead transitions. [2023-08-04 09:39:41,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 150 transitions, 1189 flow [2023-08-04 09:39:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 09:39:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 09:39:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 980 transitions. [2023-08-04 09:39:41,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47070124879923153 [2023-08-04 09:39:41,922 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 980 transitions. [2023-08-04 09:39:41,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 980 transitions. [2023-08-04 09:39:41,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:41,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 980 transitions. [2023-08-04 09:39:41,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.33333333333334) internal successors, (980), 6 states have internal predecessors, (980), 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 09:39:41,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 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 09:39:41,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 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 09:39:41,926 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 286 flow. Second operand 6 states and 980 transitions. [2023-08-04 09:39:41,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 150 transitions, 1189 flow [2023-08-04 09:39:42,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 150 transitions, 1015 flow, removed 71 selfloop flow, removed 8 redundant places. [2023-08-04 09:39:42,020 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 309 flow [2023-08-04 09:39:42,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-08-04 09:39:42,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2023-08-04 09:39:42,020 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 309 flow [2023-08-04 09:39:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 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 09:39:42,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:42,021 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:42,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:42,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:42,226 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:42,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash -305528760, now seen corresponding path program 1 times [2023-08-04 09:39:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909949330] [2023-08-04 09:39:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:39:42,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:42,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909949330] [2023-08-04 09:39:42,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909949330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:42,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692881219] [2023-08-04 09:39:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:42,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:42,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:42,339 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:42,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:39:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:42,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 09:39:42,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:39:42,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:39:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692881219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:42,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:42,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-08-04 09:39:42,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646392718] [2023-08-04 09:39:42,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:42,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 09:39:42,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 09:39:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-04 09:39:42,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 347 [2023-08-04 09:39:42,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 309 flow. Second operand has 16 states, 16 states have (on average 136.75) internal successors, (2188), 16 states have internal predecessors, (2188), 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 09:39:42,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:42,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 347 [2023-08-04 09:39:42,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:46,871 INFO L124 PetriNetUnfolderBase]: 30338/42592 cut-off events. [2023-08-04 09:39:46,872 INFO L125 PetriNetUnfolderBase]: For 70475/70507 co-relation queries the response was YES. [2023-08-04 09:39:46,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150321 conditions, 42592 events. 30338/42592 cut-off events. For 70475/70507 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 268912 event pairs, 3532 based on Foata normal form. 3053/41594 useless extension candidates. Maximal degree in co-relation 148941. Up to 17571 conditions per place. [2023-08-04 09:39:47,056 INFO L140 encePairwiseOnDemand]: 336/347 looper letters, 271 selfloop transitions, 20 changer transitions 165/462 dead transitions. [2023-08-04 09:39:47,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 462 transitions, 3351 flow [2023-08-04 09:39:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-04 09:39:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-04 09:39:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2792 transitions. [2023-08-04 09:39:47,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44700608389369195 [2023-08-04 09:39:47,060 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2792 transitions. [2023-08-04 09:39:47,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2792 transitions. [2023-08-04 09:39:47,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:47,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2792 transitions. [2023-08-04 09:39:47,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.11111111111111) internal successors, (2792), 18 states have internal predecessors, (2792), 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 09:39:47,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 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 09:39:47,070 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 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 09:39:47,070 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 309 flow. Second operand 18 states and 2792 transitions. [2023-08-04 09:39:47,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 462 transitions, 3351 flow [2023-08-04 09:39:47,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 462 transitions, 3342 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:47,230 INFO L231 Difference]: Finished difference. Result has 101 places, 74 transitions, 562 flow [2023-08-04 09:39:47,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=562, PETRI_PLACES=101, PETRI_TRANSITIONS=74} [2023-08-04 09:39:47,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2023-08-04 09:39:47,231 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 74 transitions, 562 flow [2023-08-04 09:39:47,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.75) internal successors, (2188), 16 states have internal predecessors, (2188), 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 09:39:47,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:47,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:47,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:47,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 09:39:47,436 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:47,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1235706193, now seen corresponding path program 1 times [2023-08-04 09:39:47,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:47,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388840286] [2023-08-04 09:39:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:47,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:39:47,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:47,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388840286] [2023-08-04 09:39:47,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388840286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:47,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997220672] [2023-08-04 09:39:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:47,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:47,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:47,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:39:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:47,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 09:39:47,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:39:47,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:39:48,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997220672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:48,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:48,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 18 [2023-08-04 09:39:48,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853432364] [2023-08-04 09:39:48,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:48,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 09:39:48,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:48,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 09:39:48,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2023-08-04 09:39:48,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 347 [2023-08-04 09:39:48,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 74 transitions, 562 flow. Second operand has 19 states, 19 states have (on average 142.89473684210526) internal successors, (2715), 19 states have internal predecessors, (2715), 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 09:39:48,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:48,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 347 [2023-08-04 09:39:48,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:53,185 INFO L124 PetriNetUnfolderBase]: 28559/40749 cut-off events. [2023-08-04 09:39:53,185 INFO L125 PetriNetUnfolderBase]: For 548177/552061 co-relation queries the response was YES. [2023-08-04 09:39:53,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259584 conditions, 40749 events. 28559/40749 cut-off events. For 548177/552061 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 259221 event pairs, 5744 based on Foata normal form. 5846/43432 useless extension candidates. Maximal degree in co-relation 256396. Up to 19415 conditions per place. [2023-08-04 09:39:53,578 INFO L140 encePairwiseOnDemand]: 338/347 looper letters, 124 selfloop transitions, 22 changer transitions 183/339 dead transitions. [2023-08-04 09:39:53,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 339 transitions, 2840 flow [2023-08-04 09:39:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 09:39:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 09:39:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2349 transitions. [2023-08-04 09:39:53,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45129682997118153 [2023-08-04 09:39:53,583 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2349 transitions. [2023-08-04 09:39:53,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2349 transitions. [2023-08-04 09:39:53,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:53,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2349 transitions. [2023-08-04 09:39:53,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 156.6) internal successors, (2349), 15 states have internal predecessors, (2349), 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 09:39:53,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 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 09:39:53,591 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 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 09:39:53,591 INFO L175 Difference]: Start difference. First operand has 101 places, 74 transitions, 562 flow. Second operand 15 states and 2349 transitions. [2023-08-04 09:39:53,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 339 transitions, 2840 flow [2023-08-04 09:39:53,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 339 transitions, 2719 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-08-04 09:39:53,858 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 768 flow [2023-08-04 09:39:53,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=768, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2023-08-04 09:39:53,858 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2023-08-04 09:39:53,858 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 768 flow [2023-08-04 09:39:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.89473684210526) internal successors, (2715), 19 states have internal predecessors, (2715), 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 09:39:53,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:53,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:53,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:54,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:54,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:54,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2004389358, now seen corresponding path program 2 times [2023-08-04 09:39:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:54,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687173078] [2023-08-04 09:39:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:54,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:39:54,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687173078] [2023-08-04 09:39:54,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687173078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558132242] [2023-08-04 09:39:54,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:39:54,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:54,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:54,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:54,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:39:54,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:39:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:39:54,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:39:54,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:39:54,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:39:54,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558132242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:54,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:54,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 09:39:54,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805072649] [2023-08-04 09:39:54,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:54,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 09:39:54,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 09:39:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 09:39:54,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 347 [2023-08-04 09:39:54,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 768 flow. Second operand has 8 states, 8 states have (on average 146.5) internal successors, (1172), 8 states have internal predecessors, (1172), 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 09:39:54,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:54,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 347 [2023-08-04 09:39:54,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:01,575 INFO L124 PetriNetUnfolderBase]: 45263/64812 cut-off events. [2023-08-04 09:40:01,576 INFO L125 PetriNetUnfolderBase]: For 903063/903432 co-relation queries the response was YES. [2023-08-04 09:40:02,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411543 conditions, 64812 events. 45263/64812 cut-off events. For 903063/903432 co-relation queries the response was YES. Maximal size of possible extension queue 1757. Compared 433319 event pairs, 13587 based on Foata normal form. 104/60496 useless extension candidates. Maximal degree in co-relation 411473. Up to 28727 conditions per place. [2023-08-04 09:40:02,451 INFO L140 encePairwiseOnDemand]: 341/347 looper letters, 273 selfloop transitions, 37 changer transitions 8/324 dead transitions. [2023-08-04 09:40:02,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 324 transitions, 3596 flow [2023-08-04 09:40:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 09:40:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 09:40:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1329 transitions. [2023-08-04 09:40:02,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787463976945245 [2023-08-04 09:40:02,453 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1329 transitions. [2023-08-04 09:40:02,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1329 transitions. [2023-08-04 09:40:02,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:02,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1329 transitions. [2023-08-04 09:40:02,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 166.125) internal successors, (1329), 8 states have internal predecessors, (1329), 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 09:40:02,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 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 09:40:02,458 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 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 09:40:02,458 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 768 flow. Second operand 8 states and 1329 transitions. [2023-08-04 09:40:02,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 324 transitions, 3596 flow [2023-08-04 09:40:04,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 324 transitions, 2963 flow, removed 310 selfloop flow, removed 15 redundant places. [2023-08-04 09:40:04,182 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 1092 flow [2023-08-04 09:40:04,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1092, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2023-08-04 09:40:04,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2023-08-04 09:40:04,182 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 1092 flow [2023-08-04 09:40:04,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.5) internal successors, (1172), 8 states have internal predecessors, (1172), 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 09:40:04,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:04,183 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:04,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:04,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:04,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -668602012, now seen corresponding path program 3 times [2023-08-04 09:40:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:04,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327659654] [2023-08-04 09:40:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:40:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:04,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327659654] [2023-08-04 09:40:04,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327659654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:04,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:40:04,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:40:04,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987587078] [2023-08-04 09:40:04,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:04,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:04,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:04,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:04,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:04,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2023-08-04 09:40:04,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 1092 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 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 09:40:04,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:04,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2023-08-04 09:40:04,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:12,557 INFO L124 PetriNetUnfolderBase]: 55313/80267 cut-off events. [2023-08-04 09:40:12,557 INFO L125 PetriNetUnfolderBase]: For 547626/547768 co-relation queries the response was YES. [2023-08-04 09:40:13,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416934 conditions, 80267 events. 55313/80267 cut-off events. For 547626/547768 co-relation queries the response was YES. Maximal size of possible extension queue 2200. Compared 561653 event pairs, 24149 based on Foata normal form. 497/76786 useless extension candidates. Maximal degree in co-relation 416875. Up to 43494 conditions per place. [2023-08-04 09:40:13,332 INFO L140 encePairwiseOnDemand]: 342/347 looper letters, 225 selfloop transitions, 23 changer transitions 4/258 dead transitions. [2023-08-04 09:40:13,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 258 transitions, 2893 flow [2023-08-04 09:40:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:40:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:40:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 845 transitions. [2023-08-04 09:40:13,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48703170028818443 [2023-08-04 09:40:13,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 845 transitions. [2023-08-04 09:40:13,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 845 transitions. [2023-08-04 09:40:13,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:13,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 845 transitions. [2023-08-04 09:40:13,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 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 09:40:13,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:40:13,336 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:40:13,336 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 1092 flow. Second operand 5 states and 845 transitions. [2023-08-04 09:40:13,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 258 transitions, 2893 flow [2023-08-04 09:40:14,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 258 transitions, 2829 flow, removed 32 selfloop flow, removed 0 redundant places. [2023-08-04 09:40:14,609 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 1359 flow [2023-08-04 09:40:14,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1359, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2023-08-04 09:40:14,610 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2023-08-04 09:40:14,610 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 1359 flow [2023-08-04 09:40:14,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 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 09:40:14,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:14,610 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:14,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 09:40:14,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:14,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1902489262, now seen corresponding path program 4 times [2023-08-04 09:40:14,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:14,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479759058] [2023-08-04 09:40:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:14,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:40:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:14,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479759058] [2023-08-04 09:40:14,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479759058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:14,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:40:14,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:40:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61712356] [2023-08-04 09:40:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:14,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:14,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2023-08-04 09:40:14,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 1359 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 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 09:40:14,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:14,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2023-08-04 09:40:14,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:22,860 INFO L124 PetriNetUnfolderBase]: 54002/78784 cut-off events. [2023-08-04 09:40:22,861 INFO L125 PetriNetUnfolderBase]: For 572763/572901 co-relation queries the response was YES. [2023-08-04 09:40:23,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410226 conditions, 78784 events. 54002/78784 cut-off events. For 572763/572901 co-relation queries the response was YES. Maximal size of possible extension queue 2200. Compared 558615 event pairs, 21600 based on Foata normal form. 1326/77078 useless extension candidates. Maximal degree in co-relation 410163. Up to 39589 conditions per place. [2023-08-04 09:40:23,670 INFO L140 encePairwiseOnDemand]: 342/347 looper letters, 209 selfloop transitions, 35 changer transitions 3/253 dead transitions. [2023-08-04 09:40:23,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 253 transitions, 2843 flow [2023-08-04 09:40:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:40:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:40:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 843 transitions. [2023-08-04 09:40:23,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48587896253602303 [2023-08-04 09:40:23,672 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 843 transitions. [2023-08-04 09:40:23,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 843 transitions. [2023-08-04 09:40:23,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:23,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 843 transitions. [2023-08-04 09:40:23,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 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 09:40:23,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:40:23,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:40:23,674 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 1359 flow. Second operand 5 states and 843 transitions. [2023-08-04 09:40:23,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 253 transitions, 2843 flow [2023-08-04 09:40:25,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 253 transitions, 2786 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-04 09:40:25,093 INFO L231 Difference]: Finished difference. Result has 107 places, 126 transitions, 1503 flow [2023-08-04 09:40:25,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1503, PETRI_PLACES=107, PETRI_TRANSITIONS=126} [2023-08-04 09:40:25,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2023-08-04 09:40:25,094 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 126 transitions, 1503 flow [2023-08-04 09:40:25,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 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 09:40:25,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:25,094 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:25,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 09:40:25,094 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:25,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1791352030, now seen corresponding path program 5 times [2023-08-04 09:40:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872829629] [2023-08-04 09:40:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:40:25,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872829629] [2023-08-04 09:40:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872829629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:25,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:40:25,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:40:25,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921549973] [2023-08-04 09:40:25,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:25,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:25,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:25,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2023-08-04 09:40:25,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 126 transitions, 1503 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 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 09:40:25,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:25,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2023-08-04 09:40:25,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:32,630 INFO L124 PetriNetUnfolderBase]: 48196/69794 cut-off events. [2023-08-04 09:40:32,630 INFO L125 PetriNetUnfolderBase]: For 520071/520254 co-relation queries the response was YES. [2023-08-04 09:40:33,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374103 conditions, 69794 events. 48196/69794 cut-off events. For 520071/520254 co-relation queries the response was YES. Maximal size of possible extension queue 1893. Compared 480566 event pairs, 19388 based on Foata normal form. 165/66926 useless extension candidates. Maximal degree in co-relation 374037. Up to 46187 conditions per place. [2023-08-04 09:40:33,322 INFO L140 encePairwiseOnDemand]: 341/347 looper letters, 215 selfloop transitions, 28 changer transitions 6/255 dead transitions. [2023-08-04 09:40:33,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 255 transitions, 2926 flow [2023-08-04 09:40:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 09:40:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 09:40:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 997 transitions. [2023-08-04 09:40:33,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47886647454370795 [2023-08-04 09:40:33,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 997 transitions. [2023-08-04 09:40:33,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 997 transitions. [2023-08-04 09:40:33,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:33,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 997 transitions. [2023-08-04 09:40:33,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.16666666666666) internal successors, (997), 6 states have internal predecessors, (997), 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 09:40:33,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 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 09:40:33,327 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 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 09:40:33,327 INFO L175 Difference]: Start difference. First operand has 107 places, 126 transitions, 1503 flow. Second operand 6 states and 997 transitions. [2023-08-04 09:40:33,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 255 transitions, 2926 flow [2023-08-04 09:40:34,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 255 transitions, 2856 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-08-04 09:40:34,661 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 1553 flow [2023-08-04 09:40:34,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1553, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2023-08-04 09:40:34,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2023-08-04 09:40:34,662 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 1553 flow [2023-08-04 09:40:34,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 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 09:40:34,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:34,662 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:34,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 09:40:34,663 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:34,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:34,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1188020214, now seen corresponding path program 6 times [2023-08-04 09:40:34,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:34,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844878744] [2023-08-04 09:40:34,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:34,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:40:34,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:34,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844878744] [2023-08-04 09:40:34,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844878744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:34,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:40:34,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:40:34,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582995512] [2023-08-04 09:40:34,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:34,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:34,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:34,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:34,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2023-08-04 09:40:34,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 1553 flow. Second operand has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:34,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:34,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2023-08-04 09:40:34,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:41,192 INFO L124 PetriNetUnfolderBase]: 43002/61701 cut-off events. [2023-08-04 09:40:41,193 INFO L125 PetriNetUnfolderBase]: For 484047/484185 co-relation queries the response was YES. [2023-08-04 09:40:41,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336785 conditions, 61701 events. 43002/61701 cut-off events. For 484047/484185 co-relation queries the response was YES. Maximal size of possible extension queue 1667. Compared 409137 event pairs, 16875 based on Foata normal form. 161/58830 useless extension candidates. Maximal degree in co-relation 336717. Up to 39431 conditions per place. [2023-08-04 09:40:41,803 INFO L140 encePairwiseOnDemand]: 341/347 looper letters, 167 selfloop transitions, 32 changer transitions 18/223 dead transitions. [2023-08-04 09:40:41,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 223 transitions, 2500 flow [2023-08-04 09:40:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:40:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:40:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 836 transitions. [2023-08-04 09:40:41,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48184438040345823 [2023-08-04 09:40:41,804 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 836 transitions. [2023-08-04 09:40:41,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 836 transitions. [2023-08-04 09:40:41,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:41,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 836 transitions. [2023-08-04 09:40:41,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 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 09:40:41,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:40:41,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:40:41,806 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 1553 flow. Second operand 5 states and 836 transitions. [2023-08-04 09:40:41,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 223 transitions, 2500 flow [2023-08-04 09:40:42,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 223 transitions, 2450 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-04 09:40:42,632 INFO L231 Difference]: Finished difference. Result has 115 places, 122 transitions, 1470 flow [2023-08-04 09:40:42,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1470, PETRI_PLACES=115, PETRI_TRANSITIONS=122} [2023-08-04 09:40:42,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2023-08-04 09:40:42,633 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 122 transitions, 1470 flow [2023-08-04 09:40:42,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:42,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:42,634 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:42,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 09:40:42,634 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:42,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:42,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1343687754, now seen corresponding path program 1 times [2023-08-04 09:40:42,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:42,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151227402] [2023-08-04 09:40:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:42,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:40:42,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:42,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151227402] [2023-08-04 09:40:42,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151227402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:42,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9716754] [2023-08-04 09:40:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:42,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:42,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:42,768 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:42,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 09:40:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:42,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 09:40:42,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:40:43,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:40:43,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9716754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:43,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:43,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-04 09:40:43,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813785564] [2023-08-04 09:40:43,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:43,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 09:40:43,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 09:40:43,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2023-08-04 09:40:43,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 347 [2023-08-04 09:40:43,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 122 transitions, 1470 flow. Second operand has 24 states, 24 states have (on average 143.58333333333334) internal successors, (3446), 24 states have internal predecessors, (3446), 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 09:40:43,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:43,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 347 [2023-08-04 09:40:43,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:55,665 INFO L124 PetriNetUnfolderBase]: 71980/108941 cut-off events. [2023-08-04 09:40:55,665 INFO L125 PetriNetUnfolderBase]: For 944732/950901 co-relation queries the response was YES. [2023-08-04 09:40:56,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565137 conditions, 108941 events. 71980/108941 cut-off events. For 944732/950901 co-relation queries the response was YES. Maximal size of possible extension queue 3475. Compared 883858 event pairs, 23347 based on Foata normal form. 15731/119975 useless extension candidates. Maximal degree in co-relation 559384. Up to 54247 conditions per place. [2023-08-04 09:40:56,818 INFO L140 encePairwiseOnDemand]: 340/347 looper letters, 215 selfloop transitions, 38 changer transitions 64/332 dead transitions. [2023-08-04 09:40:56,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 332 transitions, 4299 flow [2023-08-04 09:40:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 09:40:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 09:40:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1560 transitions. [2023-08-04 09:40:56,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495677233429395 [2023-08-04 09:40:56,820 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1560 transitions. [2023-08-04 09:40:56,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1560 transitions. [2023-08-04 09:40:56,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:56,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1560 transitions. [2023-08-04 09:40:56,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 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 09:40:56,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 347.0) internal successors, (3817), 11 states have internal predecessors, (3817), 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 09:40:56,824 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 347.0) internal successors, (3817), 11 states have internal predecessors, (3817), 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 09:40:56,824 INFO L175 Difference]: Start difference. First operand has 115 places, 122 transitions, 1470 flow. Second operand 10 states and 1560 transitions. [2023-08-04 09:40:56,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 332 transitions, 4299 flow [2023-08-04 09:40:59,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 332 transitions, 4153 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-04 09:40:59,143 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 2373 flow [2023-08-04 09:40:59,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2373, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2023-08-04 09:40:59,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2023-08-04 09:40:59,144 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 2373 flow [2023-08-04 09:40:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 143.58333333333334) internal successors, (3446), 24 states have internal predecessors, (3446), 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 09:40:59,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:59,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:59,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:59,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:59,345 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:59,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash 601715415, now seen corresponding path program 2 times [2023-08-04 09:40:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:59,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287260023] [2023-08-04 09:40:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:59,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:40:59,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:59,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287260023] [2023-08-04 09:40:59,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287260023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:59,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389144998] [2023-08-04 09:40:59,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:40:59,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:59,457 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:59,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 09:40:59,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:40:59,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:40:59,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 09:40:59,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:40:59,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:40:59,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389144998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:59,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:59,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2023-08-04 09:40:59,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309522976] [2023-08-04 09:40:59,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:59,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 09:40:59,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:59,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 09:40:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:40:59,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 347 [2023-08-04 09:40:59,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 2373 flow. Second operand has 10 states, 10 states have (on average 152.7) internal successors, (1527), 10 states have internal predecessors, (1527), 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 09:40:59,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:59,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 347 [2023-08-04 09:40:59,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:15,605 INFO L124 PetriNetUnfolderBase]: 88348/130654 cut-off events. [2023-08-04 09:41:15,606 INFO L125 PetriNetUnfolderBase]: For 1189000/1194542 co-relation queries the response was YES. [2023-08-04 09:41:16,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755538 conditions, 130654 events. 88348/130654 cut-off events. For 1189000/1194542 co-relation queries the response was YES. Maximal size of possible extension queue 3934. Compared 1037272 event pairs, 17025 based on Foata normal form. 7940/131319 useless extension candidates. Maximal degree in co-relation 747648. Up to 59314 conditions per place. [2023-08-04 09:41:17,545 INFO L140 encePairwiseOnDemand]: 340/347 looper letters, 173 selfloop transitions, 116 changer transitions 21/323 dead transitions. [2023-08-04 09:41:17,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 323 transitions, 4530 flow [2023-08-04 09:41:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:41:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:41:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 871 transitions. [2023-08-04 09:41:17,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020172910662825 [2023-08-04 09:41:17,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 871 transitions. [2023-08-04 09:41:17,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 871 transitions. [2023-08-04 09:41:17,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:17,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 871 transitions. [2023-08-04 09:41:17,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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 09:41:17,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:41:17,550 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:41:17,550 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 2373 flow. Second operand 5 states and 871 transitions. [2023-08-04 09:41:17,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 323 transitions, 4530 flow [2023-08-04 09:41:23,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 323 transitions, 4334 flow, removed 95 selfloop flow, removed 3 redundant places. [2023-08-04 09:41:23,061 INFO L231 Difference]: Finished difference. Result has 127 places, 191 transitions, 2961 flow [2023-08-04 09:41:23,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2961, PETRI_PLACES=127, PETRI_TRANSITIONS=191} [2023-08-04 09:41:23,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2023-08-04 09:41:23,061 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 191 transitions, 2961 flow [2023-08-04 09:41:23,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.7) internal successors, (1527), 10 states have internal predecessors, (1527), 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 09:41:23,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:23,062 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:23,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 09:41:23,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:23,262 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:23,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:23,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1023801371, now seen corresponding path program 1 times [2023-08-04 09:41:23,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:23,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581117859] [2023-08-04 09:41:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:23,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 09:41:23,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:23,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581117859] [2023-08-04 09:41:23,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581117859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:23,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582650032] [2023-08-04 09:41:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:23,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:23,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:41:23,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 09:41:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:23,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:41:23,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 09:41:23,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:41:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 09:41:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582650032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:41:23,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:41:23,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-04 09:41:23,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560539604] [2023-08-04 09:41:23,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:41:23,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 09:41:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 09:41:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:41:23,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 347 [2023-08-04 09:41:23,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 191 transitions, 2961 flow. Second operand has 10 states, 10 states have (on average 146.2) internal successors, (1462), 10 states have internal predecessors, (1462), 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 09:41:23,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:23,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 347 [2023-08-04 09:41:23,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:41,947 INFO L124 PetriNetUnfolderBase]: 105105/151832 cut-off events. [2023-08-04 09:41:41,947 INFO L125 PetriNetUnfolderBase]: For 1912286/1912370 co-relation queries the response was YES. [2023-08-04 09:41:43,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927088 conditions, 151832 events. 105105/151832 cut-off events. For 1912286/1912370 co-relation queries the response was YES. Maximal size of possible extension queue 4324. Compared 1146357 event pairs, 38935 based on Foata normal form. 3439/146926 useless extension candidates. Maximal degree in co-relation 919176. Up to 85108 conditions per place. [2023-08-04 09:41:44,210 INFO L140 encePairwiseOnDemand]: 342/347 looper letters, 266 selfloop transitions, 31 changer transitions 34/337 dead transitions. [2023-08-04 09:41:44,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 337 transitions, 5369 flow [2023-08-04 09:41:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:41:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:41:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2023-08-04 09:41:44,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47031700288184436 [2023-08-04 09:41:44,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2023-08-04 09:41:44,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2023-08-04 09:41:44,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:44,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2023-08-04 09:41:44,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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 09:41:44,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:41:44,214 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 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 09:41:44,214 INFO L175 Difference]: Start difference. First operand has 127 places, 191 transitions, 2961 flow. Second operand 5 states and 816 transitions. [2023-08-04 09:41:44,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 337 transitions, 5369 flow [2023-08-04 09:41:49,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 337 transitions, 5000 flow, removed 148 selfloop flow, removed 6 redundant places. [2023-08-04 09:41:49,770 INFO L231 Difference]: Finished difference. Result has 121 places, 195 transitions, 3002 flow [2023-08-04 09:41:49,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3002, PETRI_PLACES=121, PETRI_TRANSITIONS=195} [2023-08-04 09:41:49,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2023-08-04 09:41:49,770 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 195 transitions, 3002 flow [2023-08-04 09:41:49,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.2) internal successors, (1462), 10 states have internal predecessors, (1462), 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 09:41:49,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:49,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:49,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 09:41:49,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 09:41:49,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:49,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1940708278, now seen corresponding path program 2 times [2023-08-04 09:41:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:49,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268086553] [2023-08-04 09:41:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:41:50,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:50,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268086553] [2023-08-04 09:41:50,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268086553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:50,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220950195] [2023-08-04 09:41:50,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:41:50,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:50,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:50,684 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:41:50,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 09:41:50,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:41:50,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:41:50,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-04 09:41:50,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:41:50,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-04 09:41:50,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-04 09:41:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:41:51,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:41:51,132 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:41:51,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-04 09:41:51,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-04 09:41:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 09:41:51,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220950195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:41:51,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:41:51,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 6] total 26 [2023-08-04 09:41:51,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346919763] [2023-08-04 09:41:51,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:41:51,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-04 09:41:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-04 09:41:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=624, Unknown=1, NotChecked=0, Total=702 [2023-08-04 09:41:52,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 347 [2023-08-04 09:41:52,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 195 transitions, 3002 flow. Second operand has 27 states, 27 states have (on average 127.22222222222223) internal successors, (3435), 27 states have internal predecessors, (3435), 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 09:41:52,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:52,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 347 [2023-08-04 09:41:52,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:57,015 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_858 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_858) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) (= |c_thread2Thread2of2ForFork1_~j~0#1| 1)) is different from false [2023-08-04 09:42:02,338 WARN L839 $PredicateComparison]: unable to prove that (and (= |c_thread2Thread1of2ForFork1_~j~0#1| 1) (forall ((v_ArrVal_858 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_858) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) (= |c_thread2Thread2of2ForFork1_~j~0#1| 1)) is different from false [2023-08-04 09:43:39,200 INFO L124 PetriNetUnfolderBase]: 538865/738509 cut-off events. [2023-08-04 09:43:39,200 INFO L125 PetriNetUnfolderBase]: For 5268707/5307751 co-relation queries the response was YES. [2023-08-04 09:43:46,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4221558 conditions, 738509 events. 538865/738509 cut-off events. For 5268707/5307751 co-relation queries the response was YES. Maximal size of possible extension queue 18331. Compared 5858770 event pairs, 42256 based on Foata normal form. 92251/789089 useless extension candidates. Maximal degree in co-relation 4200740. Up to 353911 conditions per place.