/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_parallel-lamport.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:44:37,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:44:38,019 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:44:38,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:44:38,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:44:38,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:44:38,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:44:38,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:44:38,053 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:44:38,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:44:38,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:44:38,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:44:38,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:44:38,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:44:38,060 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:44:38,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:44:38,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:44:38,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:44:38,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:44:38,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:44:38,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:44:38,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:44:38,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:44:38,062 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:44:38,062 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:44:38,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:44:38,063 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:44:38,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:44:38,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:44:38,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:44:38,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:44:38,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:44:38,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:44:38,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:44:38,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:44:38,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:44:38,066 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:44:38,066 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:44:38,066 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:44:38,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:44:38,066 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:44:38,067 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:44:38,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:44:38,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:44:38,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:44:38,334 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:44:38,334 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:44:38,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c [2023-08-04 08:44:39,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:44:39,737 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:44:39,738 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c [2023-08-04 08:44:39,745 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cdcd646d/882d1df36d264b54ae482379e9d2abb5/FLAGa52574904 [2023-08-04 08:44:39,756 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cdcd646d/882d1df36d264b54ae482379e9d2abb5 [2023-08-04 08:44:39,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:44:39,759 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:44:39,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:44:39,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:44:39,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:44:39,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:44:39" (1/1) ... [2023-08-04 08:44:39,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76fe1497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:39, skipping insertion in model container [2023-08-04 08:44:39,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:44:39" (1/1) ... [2023-08-04 08:44:39,791 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:44:39,955 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_parallel-lamport.wvr_bound2.c[4453,4466] [2023-08-04 08:44:39,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:44:39,968 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:44:39,992 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_parallel-lamport.wvr_bound2.c[4453,4466] [2023-08-04 08:44:39,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:44:40,001 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:44:40,002 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:44:40,008 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:44:40,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40 WrapperNode [2023-08-04 08:44:40,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:44:40,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:44:40,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:44:40,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:44:40,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,047 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 291 [2023-08-04 08:44:40,048 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:44:40,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:44:40,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:44:40,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:44:40,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:44:40,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:44:40,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:44:40,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:44:40,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (1/1) ... [2023-08-04 08:44:40,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:44:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:40,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:44:40,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:44:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:44:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:44:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:44:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:44:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:44:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:44:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:44:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:44:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:44:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:44:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:44:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:44:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:44:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:44:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:44:40,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:44:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:44:40,159 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:44:40,249 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:44:40,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:44:40,551 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:44:40,625 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:44:40,625 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 08:44:40,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:44:40 BoogieIcfgContainer [2023-08-04 08:44:40,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:44:40,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:44:40,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:44:40,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:44:40,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:44:39" (1/3) ... [2023-08-04 08:44:40,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd58806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:44:40, skipping insertion in model container [2023-08-04 08:44:40,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:44:40" (2/3) ... [2023-08-04 08:44:40,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd58806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:44:40, skipping insertion in model container [2023-08-04 08:44:40,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:44:40" (3/3) ... [2023-08-04 08:44:40,634 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-lamport.wvr_bound2.c [2023-08-04 08:44:40,641 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:44:40,650 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:44:40,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:44:40,650 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:44:40,726 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:44:40,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 228 transitions, 498 flow [2023-08-04 08:44:40,936 INFO L124 PetriNetUnfolderBase]: 88/683 cut-off events. [2023-08-04 08:44:40,937 INFO L125 PetriNetUnfolderBase]: For 36/38 co-relation queries the response was YES. [2023-08-04 08:44:40,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 683 events. 88/683 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 393. Up to 16 conditions per place. [2023-08-04 08:44:40,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 228 transitions, 498 flow [2023-08-04 08:44:40,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 215 transitions, 466 flow [2023-08-04 08:44:40,958 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:44:40,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 215 transitions, 466 flow [2023-08-04 08:44:40,975 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 215 transitions, 466 flow [2023-08-04 08:44:40,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 215 transitions, 466 flow [2023-08-04 08:44:41,062 INFO L124 PetriNetUnfolderBase]: 88/596 cut-off events. [2023-08-04 08:44:41,062 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:44:41,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 596 events. 88/596 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2544 event pairs, 0 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 347. Up to 16 conditions per place. [2023-08-04 08:44:41,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 4480 [2023-08-04 08:44:46,228 INFO L134 LiptonReduction]: Checked pairs total: 25837 [2023-08-04 08:44:46,229 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-04 08:44:46,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:44:46,248 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;@1cc8528e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:44:46,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:44:46,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:44:46,257 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-04 08:44:46,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:44:46,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:46,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:46,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:46,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 427583907, now seen corresponding path program 1 times [2023-08-04 08:44:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:46,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016148209] [2023-08-04 08:44:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:44:46,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:46,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016148209] [2023-08-04 08:44:46,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016148209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:46,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:44:46,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:44:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569035890] [2023-08-04 08:44:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:46,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:46,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:44:46,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2023-08-04 08:44:46,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:46,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:46,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2023-08-04 08:44:46,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:47,172 INFO L124 PetriNetUnfolderBase]: 4365/7119 cut-off events. [2023-08-04 08:44:47,172 INFO L125 PetriNetUnfolderBase]: For 591/591 co-relation queries the response was YES. [2023-08-04 08:44:47,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14141 conditions, 7119 events. 4365/7119 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 47317 event pairs, 2452 based on Foata normal form. 0/6250 useless extension candidates. Maximal degree in co-relation 12505. Up to 6597 conditions per place. [2023-08-04 08:44:47,215 INFO L140 encePairwiseOnDemand]: 411/414 looper letters, 48 selfloop transitions, 2 changer transitions 1/64 dead transitions. [2023-08-04 08:44:47,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 266 flow [2023-08-04 08:44:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-04 08:44:47,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49597423510466987 [2023-08-04 08:44:47,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-04 08:44:47,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-04 08:44:47,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:47,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-04 08:44:47,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:47,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:47,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:47,244 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 152 flow. Second operand 3 states and 616 transitions. [2023-08-04 08:44:47,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 266 flow [2023-08-04 08:44:47,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:44:47,255 INFO L231 Difference]: Finished difference. Result has 55 places, 58 transitions, 148 flow [2023-08-04 08:44:47,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=55, PETRI_TRANSITIONS=58} [2023-08-04 08:44:47,259 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-04 08:44:47,259 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 58 transitions, 148 flow [2023-08-04 08:44:47,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:47,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:47,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:44:47,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:47,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2085686992, now seen corresponding path program 1 times [2023-08-04 08:44:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484235110] [2023-08-04 08:44:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:44:47,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:47,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484235110] [2023-08-04 08:44:47,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484235110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677000445] [2023-08-04 08:44:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:47,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:47,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:47,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:47,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:44:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:47,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:44:47,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:44:47,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:44:47,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677000445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:47,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:44:47,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:44:47,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604007225] [2023-08-04 08:44:47,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:47,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:47,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2023-08-04 08:44:47,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:47,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:47,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2023-08-04 08:44:47,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:48,033 INFO L124 PetriNetUnfolderBase]: 4262/6728 cut-off events. [2023-08-04 08:44:48,033 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-04 08:44:48,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13547 conditions, 6728 events. 4262/6728 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45148 event pairs, 2149 based on Foata normal form. 0/5922 useless extension candidates. Maximal degree in co-relation 13450. Up to 6348 conditions per place. [2023-08-04 08:44:48,074 INFO L140 encePairwiseOnDemand]: 411/414 looper letters, 53 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2023-08-04 08:44:48,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 282 flow [2023-08-04 08:44:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-04 08:44:48,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 08:44:48,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-04 08:44:48,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-04 08:44:48,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:48,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-04 08:44:48,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:48,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:48,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:48,090 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 148 flow. Second operand 3 states and 621 transitions. [2023-08-04 08:44:48,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 282 flow [2023-08-04 08:44:48,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:44:48,093 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 152 flow [2023-08-04 08:44:48,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-08-04 08:44:48,094 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2023-08-04 08:44:48,094 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 152 flow [2023-08-04 08:44:48,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:48,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:48,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:48,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:48,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:48,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:48,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1299888135, now seen corresponding path program 1 times [2023-08-04 08:44:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:48,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892444766] [2023-08-04 08:44:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:48,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:44:48,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:48,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892444766] [2023-08-04 08:44:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892444766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:48,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316313239] [2023-08-04 08:44:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:48,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:48,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:48,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:48,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:44:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:48,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:44:48,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:44:48,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:44:48,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316313239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:48,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:44:48,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:44:48,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846688010] [2023-08-04 08:44:48,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:48,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:48,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:48,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2023-08-04 08:44:48,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:48,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:48,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2023-08-04 08:44:48,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:49,028 INFO L124 PetriNetUnfolderBase]: 4226/6782 cut-off events. [2023-08-04 08:44:49,028 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-04 08:44:49,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13673 conditions, 6782 events. 4226/6782 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 43095 event pairs, 2593 based on Foata normal form. 0/6025 useless extension candidates. Maximal degree in co-relation 11467. Up to 5920 conditions per place. [2023-08-04 08:44:49,071 INFO L140 encePairwiseOnDemand]: 411/414 looper letters, 55 selfloop transitions, 2 changer transitions 1/71 dead transitions. [2023-08-04 08:44:49,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 294 flow [2023-08-04 08:44:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-04 08:44:49,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501610305958132 [2023-08-04 08:44:49,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-04 08:44:49,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-04 08:44:49,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:49,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-04 08:44:49,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,083 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 152 flow. Second operand 3 states and 623 transitions. [2023-08-04 08:44:49,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 294 flow [2023-08-04 08:44:49,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:44:49,087 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 156 flow [2023-08-04 08:44:49,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-04 08:44:49,088 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 08:44:49,089 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 156 flow [2023-08-04 08:44:49,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:49,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:49,095 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 08:44:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:44:49,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:49,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2004642699, now seen corresponding path program 1 times [2023-08-04 08:44:49,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:49,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103194523] [2023-08-04 08:44:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:49,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:44:49,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:49,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103194523] [2023-08-04 08:44:49,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103194523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:49,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596154588] [2023-08-04 08:44:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:49,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:49,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:49,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:49,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:44:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:49,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:44:49,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:44:49,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:44:49,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596154588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:49,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:44:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:44:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997427934] [2023-08-04 08:44:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:49,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:49,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2023-08-04 08:44:49,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:49,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2023-08-04 08:44:49,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:49,852 INFO L124 PetriNetUnfolderBase]: 2594/4319 cut-off events. [2023-08-04 08:44:49,855 INFO L125 PetriNetUnfolderBase]: For 438/438 co-relation queries the response was YES. [2023-08-04 08:44:49,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9069 conditions, 4319 events. 2594/4319 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 26224 event pairs, 1893 based on Foata normal form. 0/4032 useless extension candidates. Maximal degree in co-relation 7617. Up to 3178 conditions per place. [2023-08-04 08:44:49,872 INFO L140 encePairwiseOnDemand]: 411/414 looper letters, 60 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 08:44:49,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 320 flow [2023-08-04 08:44:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-04 08:44:49,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048309178743962 [2023-08-04 08:44:49,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-04 08:44:49,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-04 08:44:49,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:49,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-04 08:44:49,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,879 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 156 flow. Second operand 3 states and 627 transitions. [2023-08-04 08:44:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 320 flow [2023-08-04 08:44:49,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:44:49,882 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 164 flow [2023-08-04 08:44:49,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-08-04 08:44:49,884 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-04 08:44:49,884 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 164 flow [2023-08-04 08:44:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:49,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:49,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:49,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:50,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:50,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:50,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash -30592032, now seen corresponding path program 1 times [2023-08-04 08:44:50,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:50,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189428246] [2023-08-04 08:44:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:50,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:44:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:50,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189428246] [2023-08-04 08:44:50,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189428246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:50,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180390307] [2023-08-04 08:44:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:50,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:50,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:50,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:50,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:44:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:50,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:44:50,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:44:50,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:44:50,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180390307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:50,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:44:50,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:44:50,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528509658] [2023-08-04 08:44:50,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:50,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:50,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:50,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2023-08-04 08:44:50,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:50,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:50,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2023-08-04 08:44:50,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:50,561 INFO L124 PetriNetUnfolderBase]: 2221/3737 cut-off events. [2023-08-04 08:44:50,561 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2023-08-04 08:44:50,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 3737 events. 2221/3737 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 21975 event pairs, 1933 based on Foata normal form. 0/3658 useless extension candidates. Maximal degree in co-relation 6780. Up to 3040 conditions per place. [2023-08-04 08:44:50,576 INFO L140 encePairwiseOnDemand]: 411/414 looper letters, 61 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 08:44:50,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 330 flow [2023-08-04 08:44:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-04 08:44:50,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048309178743962 [2023-08-04 08:44:50,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-04 08:44:50,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-04 08:44:50,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:50,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-04 08:44:50,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:50,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:50,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:50,584 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 164 flow. Second operand 3 states and 627 transitions. [2023-08-04 08:44:50,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 330 flow [2023-08-04 08:44:50,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:44:50,588 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 174 flow [2023-08-04 08:44:50,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2023-08-04 08:44:50,589 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-04 08:44:50,589 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 174 flow [2023-08-04 08:44:50,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:50,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:50,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:50,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:50,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:50,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:50,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1194290167, now seen corresponding path program 1 times [2023-08-04 08:44:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:50,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889795629] [2023-08-04 08:44:50,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:44:50,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889795629] [2023-08-04 08:44:50,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889795629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:50,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92047671] [2023-08-04 08:44:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:50,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:50,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:50,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:50,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:44:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:50,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:44:50,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:44:50,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:44:50,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92047671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:50,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:44:50,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:44:50,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134653664] [2023-08-04 08:44:50,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:51,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2023-08-04 08:44:51,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 174 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 08:44:51,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:51,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2023-08-04 08:44:51,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:51,332 INFO L124 PetriNetUnfolderBase]: 2208/3711 cut-off events. [2023-08-04 08:44:51,332 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2023-08-04 08:44:51,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8116 conditions, 3711 events. 2208/3711 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 21791 event pairs, 2162 based on Foata normal form. 0/3663 useless extension candidates. Maximal degree in co-relation 6793. Up to 3428 conditions per place. [2023-08-04 08:44:51,348 INFO L140 encePairwiseOnDemand]: 411/414 looper letters, 55 selfloop transitions, 2 changer transitions 3/73 dead transitions. [2023-08-04 08:44:51,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 73 transitions, 320 flow [2023-08-04 08:44:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-04 08:44:51,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501610305958132 [2023-08-04 08:44:51,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-04 08:44:51,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-04 08:44:51,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:51,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-04 08:44:51,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,356 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 174 flow. Second operand 3 states and 623 transitions. [2023-08-04 08:44:51,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 73 transitions, 320 flow [2023-08-04 08:44:51,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:44:51,364 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 172 flow [2023-08-04 08:44:51,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-08-04 08:44:51,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-04 08:44:51,365 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 172 flow [2023-08-04 08:44:51,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 08:44:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:51,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:51,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:51,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:51,569 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:51,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash 22499207, now seen corresponding path program 1 times [2023-08-04 08:44:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:51,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369050973] [2023-08-04 08:44:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:51,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:44:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:51,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369050973] [2023-08-04 08:44:51,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369050973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:51,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504572150] [2023-08-04 08:44:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:51,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:44:51,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:44:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:51,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:44:51,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:44:51,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:44:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:44:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504572150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:44:51,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:44:51,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:44:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697203458] [2023-08-04 08:44:51,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:44:51,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:44:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:44:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:51,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 414 [2023-08-04 08:44:51,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:51,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 414 [2023-08-04 08:44:51,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:51,870 INFO L124 PetriNetUnfolderBase]: 11/39 cut-off events. [2023-08-04 08:44:51,870 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 08:44:51,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 39 events. 11/39 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 5 based on Foata normal form. 6/44 useless extension candidates. Maximal degree in co-relation 78. Up to 22 conditions per place. [2023-08-04 08:44:51,871 INFO L140 encePairwiseOnDemand]: 411/414 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-04 08:44:51,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 82 flow [2023-08-04 08:44:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:44:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:44:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 766 transitions. [2023-08-04 08:44:51,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46256038647342995 [2023-08-04 08:44:51,873 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 766 transitions. [2023-08-04 08:44:51,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 766 transitions. [2023-08-04 08:44:51,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:51,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 766 transitions. [2023-08-04 08:44:51,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,880 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,880 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 172 flow. Second operand 4 states and 766 transitions. [2023-08-04 08:44:51,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 82 flow [2023-08-04 08:44:51,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:44:51,881 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-04 08:44:51,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-04 08:44:51,882 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -27 predicate places. [2023-08-04 08:44:51,882 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-04 08:44:51,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:51,885 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:44:51,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:44:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:52,092 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:52,094 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:44:52,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 228 transitions, 498 flow [2023-08-04 08:44:52,152 INFO L124 PetriNetUnfolderBase]: 88/683 cut-off events. [2023-08-04 08:44:52,153 INFO L125 PetriNetUnfolderBase]: For 36/38 co-relation queries the response was YES. [2023-08-04 08:44:52,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 683 events. 88/683 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 393. Up to 16 conditions per place. [2023-08-04 08:44:52,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 228 transitions, 498 flow [2023-08-04 08:44:52,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 172 transitions, 359 flow [2023-08-04 08:44:52,159 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:44:52,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 172 transitions, 359 flow [2023-08-04 08:44:52,159 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 172 transitions, 359 flow [2023-08-04 08:44:52,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 172 transitions, 359 flow [2023-08-04 08:44:52,179 INFO L124 PetriNetUnfolderBase]: 12/283 cut-off events. [2023-08-04 08:44:52,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:44:52,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 283 events. 12/283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 685 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 228. Up to 8 conditions per place. [2023-08-04 08:44:52,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 2116 [2023-08-04 08:44:57,415 INFO L134 LiptonReduction]: Checked pairs total: 10534 [2023-08-04 08:44:57,415 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-04 08:44:57,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:44:57,417 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;@1cc8528e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:44:57,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:44:57,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:44:57,419 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-08-04 08:44:57,419 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:44:57,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:57,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:57,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:44:57,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash -142726587, now seen corresponding path program 1 times [2023-08-04 08:44:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:57,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349537804] [2023-08-04 08:44:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:44:57,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:57,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349537804] [2023-08-04 08:44:57,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349537804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:57,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:44:57,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:44:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054624469] [2023-08-04 08:44:57,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:57,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:57,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:44:57,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 385 [2023-08-04 08:44:57,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:57,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 385 [2023-08-04 08:44:57,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:57,569 INFO L124 PetriNetUnfolderBase]: 710/1288 cut-off events. [2023-08-04 08:44:57,570 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 08:44:57,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 1288 events. 710/1288 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7158 event pairs, 354 based on Foata normal form. 0/1199 useless extension candidates. Maximal degree in co-relation 2561. Up to 1138 conditions per place. [2023-08-04 08:44:57,575 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 29 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-04 08:44:57,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 165 flow [2023-08-04 08:44:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-04 08:44:57,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516017316017316 [2023-08-04 08:44:57,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-04 08:44:57,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-04 08:44:57,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:57,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-04 08:44:57,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,582 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 91 flow. Second operand 3 states and 596 transitions. [2023-08-04 08:44:57,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 165 flow [2023-08-04 08:44:57,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 165 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:44:57,584 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 99 flow [2023-08-04 08:44:57,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-08-04 08:44:57,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 08:44:57,586 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 99 flow [2023-08-04 08:44:57,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:57,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 08:44:57,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:44:57,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:44:57,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -126210219, now seen corresponding path program 1 times [2023-08-04 08:44:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:57,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706378038] [2023-08-04 08:44:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:57,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:44:57,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:57,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706378038] [2023-08-04 08:44:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706378038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:44:57,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:44:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607143743] [2023-08-04 08:44:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:57,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:57,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:44:57,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 385 [2023-08-04 08:44:57,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:57,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 385 [2023-08-04 08:44:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:57,835 INFO L124 PetriNetUnfolderBase]: 710/1262 cut-off events. [2023-08-04 08:44:57,835 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 08:44:57,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 1262 events. 710/1262 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6564 event pairs, 709 based on Foata normal form. 1/1191 useless extension candidates. Maximal degree in co-relation 2524. Up to 1146 conditions per place. [2023-08-04 08:44:57,839 INFO L140 encePairwiseOnDemand]: 382/385 looper letters, 24 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-04 08:44:57,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 153 flow [2023-08-04 08:44:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2023-08-04 08:44:57,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038961038961038 [2023-08-04 08:44:57,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2023-08-04 08:44:57,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2023-08-04 08:44:57,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:57,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2023-08-04 08:44:57,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 385.0) internal successors, (1540), 4 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,846 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 99 flow. Second operand 3 states and 582 transitions. [2023-08-04 08:44:57,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 153 flow [2023-08-04 08:44:57,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:44:57,847 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 107 flow [2023-08-04 08:44:57,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-04 08:44:57,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 08:44:57,848 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 107 flow [2023-08-04 08:44:57,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:57,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:57,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:57,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:44:57,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:44:57,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:57,849 INFO L85 PathProgramCache]: Analyzing trace with hash 159231385, now seen corresponding path program 1 times [2023-08-04 08:44:57,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:57,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484500580] [2023-08-04 08:44:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:57,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:44:57,865 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:44:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:44:57,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:44:57,916 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:44:57,917 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:44:57,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:44:57,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:44:57,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:44:57,917 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 08:44:57,918 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:44:57,919 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:44:57,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:44:57,951 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:44:57,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 269 transitions, 628 flow [2023-08-04 08:44:58,402 INFO L124 PetriNetUnfolderBase]: 840/4112 cut-off events. [2023-08-04 08:44:58,402 INFO L125 PetriNetUnfolderBase]: For 602/608 co-relation queries the response was YES. [2023-08-04 08:44:58,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 4112 events. 840/4112 cut-off events. For 602/608 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 33391 event pairs, 11 based on Foata normal form. 0/3516 useless extension candidates. Maximal degree in co-relation 2441. Up to 192 conditions per place. [2023-08-04 08:44:58,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 269 transitions, 628 flow [2023-08-04 08:44:58,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 256 transitions, 590 flow [2023-08-04 08:44:58,446 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:44:58,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 256 transitions, 590 flow [2023-08-04 08:44:58,446 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 256 transitions, 590 flow [2023-08-04 08:44:58,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 256 transitions, 590 flow [2023-08-04 08:44:58,843 INFO L124 PetriNetUnfolderBase]: 840/3459 cut-off events. [2023-08-04 08:44:58,843 INFO L125 PetriNetUnfolderBase]: For 589/592 co-relation queries the response was YES. [2023-08-04 08:44:58,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 3459 events. 840/3459 cut-off events. For 589/592 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 26114 event pairs, 11 based on Foata normal form. 0/2927 useless extension candidates. Maximal degree in co-relation 2100. Up to 192 conditions per place. [2023-08-04 08:44:58,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 11888 [2023-08-04 08:45:03,847 INFO L134 LiptonReduction]: Checked pairs total: 89058 [2023-08-04 08:45:03,847 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-08-04 08:45:03,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:45:03,849 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;@1cc8528e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:45:03,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:45:03,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:45:03,852 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-08-04 08:45:03,852 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:45:03,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:45:03,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:45:03,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:45:03,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:45:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1116656154, now seen corresponding path program 1 times [2023-08-04 08:45:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:45:03,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39558706] [2023-08-04 08:45:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:45:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:45:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:45:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:45:03,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:45:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39558706] [2023-08-04 08:45:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39558706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:45:03,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:45:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:45:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059730568] [2023-08-04 08:45:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:45:03,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:45:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:45:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:45:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:45:03,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 459 [2023-08-04 08:45:03,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 97 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 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 08:45:03,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:45:03,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 459 [2023-08-04 08:45:03,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand