/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_spaghetti.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:50:08,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:50:08,912 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:50:08,917 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:50:08,918 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:50:08,918 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:50:08,919 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:50:08,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:50:08,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:50:08,955 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:50:08,955 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:50:08,955 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:50:08,956 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:50:08,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:50:08,958 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:50:08,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:50:08,958 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:50:08,958 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:50:08,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:50:08,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:50:08,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:50:08,960 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:50:08,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:50:08,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:50:08,960 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:50:08,960 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:50:08,961 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:50:08,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:50:08,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:50:08,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:50:08,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:50:08,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:50:08,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:50:08,963 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:50:08,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:50:08,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:50:08,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:50:08,964 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:50:08,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:50:08,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:50:08,964 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:50:08,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:50:09,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:50:09,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:50:09,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:50:09,167 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:50:09,167 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:50:09,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_spaghetti.wvr_bound2.c [2023-08-04 09:50:10,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:50:10,547 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:50:10,547 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_spaghetti.wvr_bound2.c [2023-08-04 09:50:10,554 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/149792350/c91ed64f16124c2d987906862d389ae0/FLAGa0025dffa [2023-08-04 09:50:10,565 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/149792350/c91ed64f16124c2d987906862d389ae0 [2023-08-04 09:50:10,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:50:10,569 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:50:10,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:50:10,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:50:10,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:50:10,573 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4468ba38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10, skipping insertion in model container [2023-08-04 09:50:10,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,597 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:50:10,726 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_spaghetti.wvr_bound2.c[3545,3558] [2023-08-04 09:50:10,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:50:10,734 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:50:10,757 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_spaghetti.wvr_bound2.c[3545,3558] [2023-08-04 09:50:10,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:50:10,765 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:50:10,765 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:50:10,770 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:50:10,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10 WrapperNode [2023-08-04 09:50:10,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:50:10,772 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:50:10,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:50:10,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:50:10,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,805 INFO L138 Inliner]: procedures = 23, calls = 59, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 144 [2023-08-04 09:50:10,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:50:10,806 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:50:10,806 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:50:10,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:50:10,813 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,829 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,830 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:50:10,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:50:10,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:50:10,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:50:10,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (1/1) ... [2023-08-04 09:50:10,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:50:10,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:10,863 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 09:50:10,868 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 09:50:10,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:50:10,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:50:10,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:50:10,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:50:10,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:50:10,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:50:10,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:50:10,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:50:10,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:50:10,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:50:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:50:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:50:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:50:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:50:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:50:10,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:50:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:50:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:50:10,895 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 09:50:10,969 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:50:10,970 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:50:11,259 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:50:11,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:50:11,282 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:50:11,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:50:11 BoogieIcfgContainer [2023-08-04 09:50:11,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:50:11,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:50:11,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:50:11,289 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:50:11,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:50:10" (1/3) ... [2023-08-04 09:50:11,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb15d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:50:11, skipping insertion in model container [2023-08-04 09:50:11,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:10" (2/3) ... [2023-08-04 09:50:11,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb15d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:50:11, skipping insertion in model container [2023-08-04 09:50:11,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:50:11" (3/3) ... [2023-08-04 09:50:11,292 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_spaghetti.wvr_bound2.c [2023-08-04 09:50:11,297 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:50:11,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:50:11,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:50:11,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:50:11,375 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:50:11,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:11,740 INFO L124 PetriNetUnfolderBase]: 268/1499 cut-off events. [2023-08-04 09:50:11,741 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:50:11,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 1499 events. 268/1499 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10422 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 848. Up to 33 conditions per place. [2023-08-04 09:50:11,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:11,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:11,782 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:11,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:11,804 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:11,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:11,973 INFO L124 PetriNetUnfolderBase]: 268/1499 cut-off events. [2023-08-04 09:50:11,973 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:50:11,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 1499 events. 268/1499 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10422 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 848. Up to 33 conditions per place. [2023-08-04 09:50:12,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 10906 [2023-08-04 09:50:14,765 INFO L134 LiptonReduction]: Checked pairs total: 20760 [2023-08-04 09:50:14,766 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-04 09:50:14,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:50:14,782 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;@26ded5ab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:14,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:50:14,789 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:14,790 INFO L124 PetriNetUnfolderBase]: 5/68 cut-off events. [2023-08-04 09:50:14,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:14,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:14,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:14,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:14,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:14,795 INFO L85 PathProgramCache]: Analyzing trace with hash 864242916, now seen corresponding path program 1 times [2023-08-04 09:50:14,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:14,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338394026] [2023-08-04 09:50:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:14,975 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 09:50:14,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338394026] [2023-08-04 09:50:14,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338394026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:14,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:14,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:50:14,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081411826] [2023-08-04 09:50:14,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:14,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:15,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:15,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:15,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:15,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:15,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:15,992 INFO L124 PetriNetUnfolderBase]: 8392/12903 cut-off events. [2023-08-04 09:50:15,992 INFO L125 PetriNetUnfolderBase]: For 1196/1196 co-relation queries the response was YES. [2023-08-04 09:50:16,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25923 conditions, 12903 events. 8392/12903 cut-off events. For 1196/1196 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 78217 event pairs, 5190 based on Foata normal form. 0/8008 useless extension candidates. Maximal degree in co-relation 20271. Up to 11768 conditions per place. [2023-08-04 09:50:16,082 INFO L140 encePairwiseOnDemand]: 343/347 looper letters, 54 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-04 09:50:16,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 320 flow [2023-08-04 09:50:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-04 09:50:16,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024015369836695 [2023-08-04 09:50:16,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-04 09:50:16,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-04 09:50:16,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:16,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-04 09:50:16,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:16,106 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 09:50:16,107 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 09:50:16,109 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 204 flow. Second operand 3 states and 523 transitions. [2023-08-04 09:50:16,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 320 flow [2023-08-04 09:50:16,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:50:16,119 INFO L231 Difference]: Finished difference. Result has 59 places, 67 transitions, 210 flow [2023-08-04 09:50:16,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=59, PETRI_TRANSITIONS=67} [2023-08-04 09:50:16,124 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 09:50:16,124 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 67 transitions, 210 flow [2023-08-04 09:50:16,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:16,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:16,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:50:16,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:16,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1105491507, now seen corresponding path program 1 times [2023-08-04 09:50:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48547949] [2023-08-04 09:50:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:16,367 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 09:50:16,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:16,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48547949] [2023-08-04 09:50:16,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48547949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:16,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759343943] [2023-08-04 09:50:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:16,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:16,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:16,375 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 09:50:16,380 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 09:50:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:16,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:16,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:16,464 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 09:50:16,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:16,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759343943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:16,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:16,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:16,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133334965] [2023-08-04 09:50:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:16,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:16,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:16,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:16,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 67 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:16,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:16,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:16,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:17,348 INFO L124 PetriNetUnfolderBase]: 8081/12409 cut-off events. [2023-08-04 09:50:17,349 INFO L125 PetriNetUnfolderBase]: For 1290/1290 co-relation queries the response was YES. [2023-08-04 09:50:17,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24947 conditions, 12409 events. 8081/12409 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 74516 event pairs, 5084 based on Foata normal form. 0/7713 useless extension candidates. Maximal degree in co-relation 19292. Up to 11299 conditions per place. [2023-08-04 09:50:17,434 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 56 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 09:50:17,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 336 flow [2023-08-04 09:50:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 09:50:17,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033621517771374 [2023-08-04 09:50:17,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 09:50:17,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 09:50:17,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:17,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 09:50:17,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:17,442 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 09:50:17,442 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 09:50:17,443 INFO L175 Difference]: Start difference. First operand has 59 places, 67 transitions, 210 flow. Second operand 3 states and 524 transitions. [2023-08-04 09:50:17,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 336 flow [2023-08-04 09:50:17,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:17,451 INFO L231 Difference]: Finished difference. Result has 60 places, 67 transitions, 214 flow [2023-08-04 09:50:17,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=60, PETRI_TRANSITIONS=67} [2023-08-04 09:50:17,452 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-04 09:50:17,452 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 67 transitions, 214 flow [2023-08-04 09:50:17,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:17,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:17,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:17,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:17,658 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 09:50:17,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:17,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 773284343, now seen corresponding path program 1 times [2023-08-04 09:50:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202927193] [2023-08-04 09:50:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:17,828 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 09:50:17,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:17,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202927193] [2023-08-04 09:50:17,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202927193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:17,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517690047] [2023-08-04 09:50:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:17,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:17,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:17,830 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 09:50:17,847 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 09:50:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:17,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:17,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:17,907 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 09:50:17,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517690047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:17,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:17,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114356337] [2023-08-04 09:50:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:17,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:17,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 67 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:17,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:17,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:17,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:18,806 INFO L124 PetriNetUnfolderBase]: 7813/12027 cut-off events. [2023-08-04 09:50:18,806 INFO L125 PetriNetUnfolderBase]: For 1265/1265 co-relation queries the response was YES. [2023-08-04 09:50:18,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24254 conditions, 12027 events. 7813/12027 cut-off events. For 1265/1265 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 71030 event pairs, 5002 based on Foata normal form. 0/7478 useless extension candidates. Maximal degree in co-relation 18603. Up to 10916 conditions per place. [2023-08-04 09:50:18,887 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 58 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 09:50:18,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 348 flow [2023-08-04 09:50:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-04 09:50:18,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505283381364073 [2023-08-04 09:50:18,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-04 09:50:18,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-04 09:50:18,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:18,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-04 09:50:18,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:18,894 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 09:50:18,895 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 09:50:18,895 INFO L175 Difference]: Start difference. First operand has 60 places, 67 transitions, 214 flow. Second operand 3 states and 526 transitions. [2023-08-04 09:50:18,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 348 flow [2023-08-04 09:50:18,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:18,900 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 214 flow [2023-08-04 09:50:18,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-08-04 09:50:18,901 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 09:50:18,901 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 214 flow [2023-08-04 09:50:18,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:18,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:18,901 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 09:50:18,909 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 09:50:19,106 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 09:50:19,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:19,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1195030717, now seen corresponding path program 1 times [2023-08-04 09:50:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:19,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593911674] [2023-08-04 09:50:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:19,188 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 09:50:19,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:19,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593911674] [2023-08-04 09:50:19,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593911674] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609042196] [2023-08-04 09:50:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:19,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:19,190 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 09:50:19,221 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 09:50:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:19,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:19,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:19,279 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 09:50:19,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:19,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609042196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:19,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:19,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:19,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584707665] [2023-08-04 09:50:19,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:19,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:19,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:19,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:19,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:19,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:19,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:19,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:20,253 INFO L124 PetriNetUnfolderBase]: 7597/11864 cut-off events. [2023-08-04 09:50:20,253 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2023-08-04 09:50:20,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24196 conditions, 11864 events. 7597/11864 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70005 event pairs, 4955 based on Foata normal form. 0/7369 useless extension candidates. Maximal degree in co-relation 18546. Up to 10589 conditions per place. [2023-08-04 09:50:20,334 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 60 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 09:50:20,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 356 flow [2023-08-04 09:50:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-04 09:50:20,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072046109510087 [2023-08-04 09:50:20,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-04 09:50:20,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-04 09:50:20,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:20,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-04 09:50:20,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:20,340 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 09:50:20,341 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 09:50:20,341 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 214 flow. Second operand 3 states and 528 transitions. [2023-08-04 09:50:20,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 356 flow [2023-08-04 09:50:20,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 347 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:50:20,346 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 213 flow [2023-08-04 09:50:20,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-08-04 09:50:20,348 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-04 09:50:20,348 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 213 flow [2023-08-04 09:50:20,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:20,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:20,348 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] [2023-08-04 09:50:20,357 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 09:50:20,553 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 09:50:20,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:20,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash 777433871, now seen corresponding path program 1 times [2023-08-04 09:50:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:20,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338846089] [2023-08-04 09:50:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:20,623 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 09:50:20,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338846089] [2023-08-04 09:50:20,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338846089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006878235] [2023-08-04 09:50:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:20,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:20,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:20,629 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 09:50:20,639 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 09:50:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:20,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:20,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:50:20,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:20,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006878235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:20,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:20,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:20,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413848524] [2023-08-04 09:50:20,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:20,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:20,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:20,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 213 flow. Second operand has 3 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 09:50:20,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:20,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:20,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:21,244 INFO L124 PetriNetUnfolderBase]: 5113/8165 cut-off events. [2023-08-04 09:50:21,244 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2023-08-04 09:50:21,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17032 conditions, 8165 events. 5113/8165 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 45874 event pairs, 3906 based on Foata normal form. 0/5155 useless extension candidates. Maximal degree in co-relation 8076. Up to 6701 conditions per place. [2023-08-04 09:50:21,295 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 65 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:50:21,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 386 flow [2023-08-04 09:50:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-04 09:50:21,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120076849183477 [2023-08-04 09:50:21,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-04 09:50:21,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-04 09:50:21,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:21,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-04 09:50:21,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:21,301 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 09:50:21,302 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 09:50:21,302 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 213 flow. Second operand 3 states and 533 transitions. [2023-08-04 09:50:21,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 386 flow [2023-08-04 09:50:21,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:21,306 INFO L231 Difference]: Finished difference. Result has 61 places, 67 transitions, 221 flow [2023-08-04 09:50:21,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=61, PETRI_TRANSITIONS=67} [2023-08-04 09:50:21,307 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 09:50:21,307 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 67 transitions, 221 flow [2023-08-04 09:50:21,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:50:21,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:21,308 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 09:50:21,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:21,513 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 09:50:21,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:21,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1603628382, now seen corresponding path program 1 times [2023-08-04 09:50:21,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:21,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378608171] [2023-08-04 09:50:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:21,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:21,594 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 09:50:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:21,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378608171] [2023-08-04 09:50:21,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378608171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:21,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666036472] [2023-08-04 09:50:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:21,596 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 09:50:21,598 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 09:50:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:21,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:21,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:50:21,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:21,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666036472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:21,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:21,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330902407] [2023-08-04 09:50:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:21,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:21,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:21,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 67 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:21,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:21,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:21,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:22,127 INFO L124 PetriNetUnfolderBase]: 3868/6270 cut-off events. [2023-08-04 09:50:22,127 INFO L125 PetriNetUnfolderBase]: For 943/943 co-relation queries the response was YES. [2023-08-04 09:50:22,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13539 conditions, 6270 events. 3868/6270 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 33298 event pairs, 2893 based on Foata normal form. 0/4287 useless extension candidates. Maximal degree in co-relation 6482. Up to 4649 conditions per place. [2023-08-04 09:50:22,170 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 66 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 09:50:22,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 396 flow [2023-08-04 09:50:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-04 09:50:22,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120076849183477 [2023-08-04 09:50:22,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-04 09:50:22,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-04 09:50:22,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:22,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-04 09:50:22,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:22,176 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 09:50:22,177 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 09:50:22,177 INFO L175 Difference]: Start difference. First operand has 61 places, 67 transitions, 221 flow. Second operand 3 states and 533 transitions. [2023-08-04 09:50:22,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 396 flow [2023-08-04 09:50:22,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:22,183 INFO L231 Difference]: Finished difference. Result has 63 places, 68 transitions, 231 flow [2023-08-04 09:50:22,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2023-08-04 09:50:22,184 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-08-04 09:50:22,184 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 68 transitions, 231 flow [2023-08-04 09:50:22,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:22,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:22,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:22,189 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 09:50:22,389 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 09:50:22,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:22,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1404179063, now seen corresponding path program 1 times [2023-08-04 09:50:22,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:22,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093218754] [2023-08-04 09:50:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:22,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:50:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:22,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093218754] [2023-08-04 09:50:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093218754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314741150] [2023-08-04 09:50:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:22,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:22,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:22,463 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 09:50:22,466 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 09:50:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:22,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:22,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:50:22,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314741150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:22,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:22,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:22,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896624560] [2023-08-04 09:50:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:22,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:22,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:22,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:22,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:22,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:22,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 68 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:22,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:22,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:22,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:23,050 INFO L124 PetriNetUnfolderBase]: 3615/5859 cut-off events. [2023-08-04 09:50:23,051 INFO L125 PetriNetUnfolderBase]: For 985/985 co-relation queries the response was YES. [2023-08-04 09:50:23,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12978 conditions, 5859 events. 3615/5859 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 30588 event pairs, 3202 based on Foata normal form. 0/4155 useless extension candidates. Maximal degree in co-relation 8106. Up to 5077 conditions per place. [2023-08-04 09:50:23,087 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 67 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 09:50:23,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 408 flow [2023-08-04 09:50:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-04 09:50:23,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120076849183477 [2023-08-04 09:50:23,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-04 09:50:23,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-04 09:50:23,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:23,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-04 09:50:23,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:23,092 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 09:50:23,093 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 09:50:23,093 INFO L175 Difference]: Start difference. First operand has 63 places, 68 transitions, 231 flow. Second operand 3 states and 533 transitions. [2023-08-04 09:50:23,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 408 flow [2023-08-04 09:50:23,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:23,116 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 241 flow [2023-08-04 09:50:23,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2023-08-04 09:50:23,117 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2023-08-04 09:50:23,117 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 241 flow [2023-08-04 09:50:23,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:23,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:23,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:23,127 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 09:50:23,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:23,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:23,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:23,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1818752591, now seen corresponding path program 1 times [2023-08-04 09:50:23,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:23,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745762490] [2023-08-04 09:50:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:23,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:50:23,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:23,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745762490] [2023-08-04 09:50:23,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745762490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:23,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027209448] [2023-08-04 09:50:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:23,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:23,377 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 09:50:23,379 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 09:50:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:23,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:23,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:23,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027209448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:23,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:23,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:50:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474859470] [2023-08-04 09:50:23,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:23,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:23,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 347 [2023-08-04 09:50:23,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:23,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:23,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 347 [2023-08-04 09:50:23,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:23,826 INFO L124 PetriNetUnfolderBase]: 3606/5840 cut-off events. [2023-08-04 09:50:23,826 INFO L125 PetriNetUnfolderBase]: For 891/891 co-relation queries the response was YES. [2023-08-04 09:50:23,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12981 conditions, 5840 events. 3606/5840 cut-off events. For 891/891 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 30455 event pairs, 3347 based on Foata normal form. 0/4165 useless extension candidates. Maximal degree in co-relation 11854. Up to 5354 conditions per place. [2023-08-04 09:50:23,871 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 61 selfloop transitions, 2 changer transitions 2/78 dead transitions. [2023-08-04 09:50:23,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 389 flow [2023-08-04 09:50:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-04 09:50:23,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072046109510087 [2023-08-04 09:50:23,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-04 09:50:23,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-04 09:50:23,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:23,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-04 09:50:23,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:23,877 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 09:50:23,877 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 09:50:23,877 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 241 flow. Second operand 3 states and 528 transitions. [2023-08-04 09:50:23,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 389 flow [2023-08-04 09:50:23,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:23,902 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 243 flow [2023-08-04 09:50:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2023-08-04 09:50:23,903 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-04 09:50:23,903 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 243 flow [2023-08-04 09:50:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:23,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:23,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:23,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:24,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:24,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:24,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:24,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1594461151, now seen corresponding path program 1 times [2023-08-04 09:50:24,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:24,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913981609] [2023-08-04 09:50:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:24,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:24,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:24,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913981609] [2023-08-04 09:50:24,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913981609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:24,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347530254] [2023-08-04 09:50:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:24,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:24,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:24,169 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 09:50:24,171 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 09:50:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:24,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:50:24,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:24,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347530254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:24,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:24,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:50:24,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397695674] [2023-08-04 09:50:24,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:50:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:50:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:24,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 347 [2023-08-04 09:50:24,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 162.2) internal successors, (811), 5 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:24,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:24,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 347 [2023-08-04 09:50:24,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:24,350 INFO L124 PetriNetUnfolderBase]: 5/17 cut-off events. [2023-08-04 09:50:24,351 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:24,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 17 events. 5/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 31 event pairs, 0 based on Foata normal form. 3/17 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 09:50:24,351 INFO L140 encePairwiseOnDemand]: 344/347 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 09:50:24,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 11 transitions, 44 flow [2023-08-04 09:50:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 626 transitions. [2023-08-04 09:50:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4510086455331412 [2023-08-04 09:50:24,353 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 626 transitions. [2023-08-04 09:50:24,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 626 transitions. [2023-08-04 09:50:24,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:24,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 626 transitions. [2023-08-04 09:50:24,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:24,357 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 09:50:24,358 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 09:50:24,358 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 243 flow. Second operand 4 states and 626 transitions. [2023-08-04 09:50:24,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 11 transitions, 44 flow [2023-08-04 09:50:24,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 11 transitions, 42 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:24,359 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 09:50:24,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 09:50:24,359 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -34 predicate places. [2023-08-04 09:50:24,359 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 09:50:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.2) internal successors, (811), 5 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:24,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:50:24,370 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 09:50:24,567 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,SelfDestructingSolverStorable8 [2023-08-04 09:50:24,567 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:24,569 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:50:24,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:24,690 INFO L124 PetriNetUnfolderBase]: 268/1499 cut-off events. [2023-08-04 09:50:24,690 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:50:24,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 1499 events. 268/1499 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10422 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 848. Up to 33 conditions per place. [2023-08-04 09:50:24,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:24,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:24,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:24,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:24,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:24,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 458 flow [2023-08-04 09:50:24,819 INFO L124 PetriNetUnfolderBase]: 268/1499 cut-off events. [2023-08-04 09:50:24,819 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:50:24,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 1499 events. 268/1499 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10422 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 848. Up to 33 conditions per place. [2023-08-04 09:50:24,846 INFO L119 LiptonReduction]: Number of co-enabled transitions 10906 [2023-08-04 09:50:27,232 INFO L134 LiptonReduction]: Checked pairs total: 20910 [2023-08-04 09:50:27,232 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-04 09:50:27,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:50:27,234 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;@26ded5ab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:27,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:50:27,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:27,237 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2023-08-04 09:50:27,237 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:27,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:27,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:50:27,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:50:27,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash 152348047, now seen corresponding path program 1 times [2023-08-04 09:50:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:27,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715294877] [2023-08-04 09:50:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:27,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:50:27,263 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:50:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:50:27,281 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:50:27,282 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:50:27,282 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:50:27,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:50:27,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:50:27,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:50:27,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:50:27,283 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:50:27,283 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:50:27,284 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:50:27,284 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:50:27,309 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:50:27,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 261 transitions, 666 flow [2023-08-04 09:50:29,392 INFO L124 PetriNetUnfolderBase]: 5481/20442 cut-off events. [2023-08-04 09:50:29,393 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:50:29,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24827 conditions, 20442 events. 5481/20442 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 217938 event pairs, 162 based on Foata normal form. 0/17482 useless extension candidates. Maximal degree in co-relation 12360. Up to 1024 conditions per place. [2023-08-04 09:50:29,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 261 transitions, 666 flow [2023-08-04 09:50:29,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 261 transitions, 666 flow [2023-08-04 09:50:29,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:29,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 261 transitions, 666 flow [2023-08-04 09:50:29,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 261 transitions, 666 flow [2023-08-04 09:50:29,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 261 transitions, 666 flow [2023-08-04 09:50:31,573 INFO L124 PetriNetUnfolderBase]: 5481/20442 cut-off events. [2023-08-04 09:50:31,573 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:50:31,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24827 conditions, 20442 events. 5481/20442 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 217938 event pairs, 162 based on Foata normal form. 0/17482 useless extension candidates. Maximal degree in co-relation 12360. Up to 1024 conditions per place. [2023-08-04 09:50:32,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 29360 [2023-08-04 09:50:35,132 INFO L134 LiptonReduction]: Checked pairs total: 69959 [2023-08-04 09:50:35,132 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-04 09:50:35,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:50:35,134 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;@26ded5ab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:35,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:50:35,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:35,138 INFO L124 PetriNetUnfolderBase]: 4/60 cut-off events. [2023-08-04 09:50:35,138 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:50:35,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:35,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:35,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:35,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1237741517, now seen corresponding path program 1 times [2023-08-04 09:50:35,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:35,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910737669] [2023-08-04 09:50:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:35,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:35,159 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 09:50:35,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:35,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910737669] [2023-08-04 09:50:35,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910737669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:35,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:35,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:50:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327591600] [2023-08-04 09:50:35,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:35,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:35,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:35,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 453 [2023-08-04 09:50:35,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:35,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:35,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 453 [2023-08-04 09:50:35,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand