/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/pthread-wmm_mix008_tso.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 05:35:57,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 05:35:57,577 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 05:35:57,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 05:35:57,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 05:35:57,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 05:35:57,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 05:35:57,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 05:35:57,611 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 05:35:57,614 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 05:35:57,615 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 05:35:57,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 05:35:57,616 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 05:35:57,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 05:35:57,618 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 05:35:57,618 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 05:35:57,618 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 05:35:57,618 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 05:35:57,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 05:35:57,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 05:35:57,619 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 05:35:57,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 05:35:57,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 05:35:57,620 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 05:35:57,620 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 05:35:57,620 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 05:35:57,620 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 05:35:57,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 05:35:57,621 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 05:35:57,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 05:35:57,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:35:57,623 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 05:35:57,623 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 05:35:57,623 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 05:35:57,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 05:35:57,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 05:35:57,624 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 05:35:57,624 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 05:35:57,624 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 05:35:57,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 05:35:57,624 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 05:35:57,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 05:35:57,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 05:35:57,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 05:35:57,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 05:35:57,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 05:35:57,855 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 05:35:57,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix008_tso.oepc_bound2.i [2023-08-04 05:35:59,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 05:35:59,224 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 05:35:59,225 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix008_tso.oepc_bound2.i [2023-08-04 05:35:59,241 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a332cf65b/1698bac309ab4176b9b0b843afa2299a/FLAG3e6004712 [2023-08-04 05:35:59,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a332cf65b/1698bac309ab4176b9b0b843afa2299a [2023-08-04 05:35:59,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 05:35:59,258 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 05:35:59,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 05:35:59,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 05:35:59,262 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 05:35:59,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:35:59,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634a84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59, skipping insertion in model container [2023-08-04 05:35:59,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:35:59,310 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 05:35:59,482 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix008_tso.oepc_bound2.i[949,962] [2023-08-04 05:35:59,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:35:59,760 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 05:35:59,772 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix008_tso.oepc_bound2.i[949,962] [2023-08-04 05:35:59,791 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 05:35:59,793 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 05:35:59,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:35:59,899 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:35:59,899 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:35:59,905 INFO L206 MainTranslator]: Completed translation [2023-08-04 05:35:59,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59 WrapperNode [2023-08-04 05:35:59,906 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 05:35:59,907 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 05:35:59,907 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 05:35:59,907 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 05:35:59,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:35:59,936 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:35:59,974 INFO L138 Inliner]: procedures = 177, calls = 72, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 314 [2023-08-04 05:35:59,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 05:35:59,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 05:35:59,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 05:35:59,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 05:35:59,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:35:59,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:35:59,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:35:59,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:36:00,012 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:36:00,015 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:36:00,019 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:36:00,021 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:36:00,026 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 05:36:00,027 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 05:36:00,028 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 05:36:00,028 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 05:36:00,028 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (1/1) ... [2023-08-04 05:36:00,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:36:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:36:00,074 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 05:36:00,083 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 05:36:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 05:36:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 05:36:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 05:36:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 05:36:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 05:36:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 05:36:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 05:36:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 05:36:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 05:36:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 05:36:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 05:36:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 05:36:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 05:36:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 05:36:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 05:36:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 05:36:00,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 05:36:00,121 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 05:36:00,249 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 05:36:00,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 05:36:00,648 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 05:36:00,882 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 05:36:00,882 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 05:36:00,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:36:00 BoogieIcfgContainer [2023-08-04 05:36:00,885 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 05:36:00,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 05:36:00,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 05:36:00,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 05:36:00,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 05:35:59" (1/3) ... [2023-08-04 05:36:00,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db0a18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:36:00, skipping insertion in model container [2023-08-04 05:36:00,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:35:59" (2/3) ... [2023-08-04 05:36:00,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db0a18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:36:00, skipping insertion in model container [2023-08-04 05:36:00,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:36:00" (3/3) ... [2023-08-04 05:36:00,892 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix008_tso.oepc_bound2.i [2023-08-04 05:36:00,900 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 05:36:00,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 05:36:00,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-04 05:36:00,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 05:36:00,960 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:36:00,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 178 transitions, 376 flow [2023-08-04 05:36:01,252 INFO L124 PetriNetUnfolderBase]: 62/965 cut-off events. [2023-08-04 05:36:01,252 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:36:01,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 965 events. 62/965 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5917 event pairs, 0 based on Foata normal form. 0/845 useless extension candidates. Maximal degree in co-relation 578. Up to 32 conditions per place. [2023-08-04 05:36:01,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 178 transitions, 376 flow [2023-08-04 05:36:01,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 176 transitions, 368 flow [2023-08-04 05:36:01,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:36:01,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 176 transitions, 368 flow [2023-08-04 05:36:01,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 176 transitions, 368 flow [2023-08-04 05:36:01,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 176 transitions, 368 flow [2023-08-04 05:36:01,418 INFO L124 PetriNetUnfolderBase]: 62/962 cut-off events. [2023-08-04 05:36:01,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:36:01,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 962 events. 62/962 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5901 event pairs, 0 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 572. Up to 32 conditions per place. [2023-08-04 05:36:01,440 INFO L119 LiptonReduction]: Number of co-enabled transitions 4448 [2023-08-04 05:36:06,902 INFO L134 LiptonReduction]: Checked pairs total: 12235 [2023-08-04 05:36:06,902 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-04 05:36:06,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:36:06,921 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;@59c50f2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:36:06,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-04 05:36:06,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:36:06,926 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-08-04 05:36:06,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:36:06,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:36:06,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 05:36:06,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 05:36:06,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:36:06,931 INFO L85 PathProgramCache]: Analyzing trace with hash 257001734, now seen corresponding path program 1 times [2023-08-04 05:36:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:36:06,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894390907] [2023-08-04 05:36:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:36:06,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:36:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:36:07,228 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 05:36:07,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:36:07,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894390907] [2023-08-04 05:36:07,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894390907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:36:07,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:36:07,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:36:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239633069] [2023-08-04 05:36:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:36:07,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:36:07,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:36:07,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:36:07,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:36:07,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-04 05:36:07,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:07,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:36:07,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-04 05:36:07,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:36:11,156 INFO L124 PetriNetUnfolderBase]: 20471/29219 cut-off events. [2023-08-04 05:36:11,156 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-04 05:36:11,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57908 conditions, 29219 events. 20471/29219 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 184238 event pairs, 15249 based on Foata normal form. 840/25208 useless extension candidates. Maximal degree in co-relation 57894. Up to 28305 conditions per place. [2023-08-04 05:36:11,371 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 2 changer transitions 1/46 dead transitions. [2023-08-04 05:36:11,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 190 flow [2023-08-04 05:36:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:36:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:36:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-04 05:36:11,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-04 05:36:11,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-04 05:36:11,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-04 05:36:11,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:36:11,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-04 05:36:11,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:11,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:11,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:11,409 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 104 flow. Second operand 3 states and 496 transitions. [2023-08-04 05:36:11,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 190 flow [2023-08-04 05:36:11,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 05:36:11,415 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 110 flow [2023-08-04 05:36:11,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-04 05:36:11,420 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-04 05:36:11,420 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 110 flow [2023-08-04 05:36:11,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:11,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:36:11,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:36:11,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 05:36:11,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 05:36:11,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:36:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash 489918576, now seen corresponding path program 1 times [2023-08-04 05:36:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:36:11,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711821000] [2023-08-04 05:36:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:36:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:36:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:36:11,565 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 05:36:11,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:36:11,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711821000] [2023-08-04 05:36:11,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711821000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:36:11,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733044913] [2023-08-04 05:36:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:36:11,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:36:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:36:11,570 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 05:36:11,573 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 05:36:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:36:11,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 05:36:11,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:36:11,699 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 05:36:11,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 05:36:11,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733044913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:36:11,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 05:36:11,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 05:36:11,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844800171] [2023-08-04 05:36:11,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:36:11,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:36:11,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:36:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:36:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:36:11,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-04 05:36:11,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:11,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:36:11,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-04 05:36:11,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:36:14,264 INFO L124 PetriNetUnfolderBase]: 17321/24350 cut-off events. [2023-08-04 05:36:14,264 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-04 05:36:14,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48290 conditions, 24350 events. 17321/24350 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 147827 event pairs, 12620 based on Foata normal form. 0/20473 useless extension candidates. Maximal degree in co-relation 48273. Up to 23573 conditions per place. [2023-08-04 05:36:14,409 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 41 selfloop transitions, 2 changer transitions 1/49 dead transitions. [2023-08-04 05:36:14,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 210 flow [2023-08-04 05:36:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:36:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:36:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-04 05:36:14,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076452599388379 [2023-08-04 05:36:14,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-04 05:36:14,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-04 05:36:14,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:36:14,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-04 05:36:14,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:14,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:14,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:14,417 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 110 flow. Second operand 3 states and 498 transitions. [2023-08-04 05:36:14,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 210 flow [2023-08-04 05:36:14,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:36:14,419 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 114 flow [2023-08-04 05:36:14,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-04 05:36:14,420 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-08-04 05:36:14,421 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 114 flow [2023-08-04 05:36:14,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:14,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:36:14,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:36:14,432 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 05:36:14,626 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 05:36:14,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 05:36:14,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:36:14,627 INFO L85 PathProgramCache]: Analyzing trace with hash 499048519, now seen corresponding path program 1 times [2023-08-04 05:36:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:36:14,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007615082] [2023-08-04 05:36:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:36:14,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:36:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:36:14,735 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 05:36:14,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:36:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007615082] [2023-08-04 05:36:14,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007615082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:36:14,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404736220] [2023-08-04 05:36:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:36:14,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:36:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:36:14,745 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 05:36:14,770 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 05:36:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:36:14,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 05:36:14,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:36:14,894 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 05:36:14,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 05:36:14,915 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 05:36:14,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404736220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 05:36:14,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 05:36:14,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 05:36:14,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595481732] [2023-08-04 05:36:14,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 05:36:14,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 05:36:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:36:14,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 05:36:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:36:14,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-04 05:36:14,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 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 05:36:14,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:36:14,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-04 05:36:14,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:36:14,953 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 05:36:14,954 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 05:36:14,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 05:36:14,956 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 05:36:14,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 05:36:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 05:36:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 05:36:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-08-04 05:36:14,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46636085626911317 [2023-08-04 05:36:14,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-08-04 05:36:14,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-08-04 05:36:14,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:36:14,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-08-04 05:36:14,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:14,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:14,964 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:14,964 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 114 flow. Second operand 4 states and 610 transitions. [2023-08-04 05:36:14,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 05:36:14,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 05:36:14,965 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 05:36:14,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 05:36:14,966 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -34 predicate places. [2023-08-04 05:36:14,966 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 05:36:14,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 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 05:36:14,969 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P3Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-04 05:36:14,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-04 05:36:14,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-04 05:36:14,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-04 05:36:14,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-04 05:36:14,978 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 05:36:15,175 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 05:36:15,175 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 05:36:15,177 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 05:36:15,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 178 transitions, 376 flow [2023-08-04 05:36:15,288 INFO L124 PetriNetUnfolderBase]: 62/965 cut-off events. [2023-08-04 05:36:15,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:36:15,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 965 events. 62/965 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5917 event pairs, 0 based on Foata normal form. 0/845 useless extension candidates. Maximal degree in co-relation 578. Up to 32 conditions per place. [2023-08-04 05:36:15,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 178 transitions, 376 flow [2023-08-04 05:36:15,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 147 transitions, 314 flow [2023-08-04 05:36:15,294 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:36:15,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 147 transitions, 314 flow [2023-08-04 05:36:15,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 147 transitions, 314 flow [2023-08-04 05:36:15,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 147 transitions, 314 flow [2023-08-04 05:36:15,341 INFO L124 PetriNetUnfolderBase]: 14/469 cut-off events. [2023-08-04 05:36:15,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:36:15,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 469 events. 14/469 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2133 event pairs, 0 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 330. Up to 16 conditions per place. [2023-08-04 05:36:15,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 2564 [2023-08-04 05:36:20,183 INFO L134 LiptonReduction]: Checked pairs total: 8113 [2023-08-04 05:36:20,183 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 05:36:20,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 05:36:20,185 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;@59c50f2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:36:20,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 05:36:20,189 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:36:20,189 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2023-08-04 05:36:20,189 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:36:20,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:36:20,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 05:36:20,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 05:36:20,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:36:20,190 INFO L85 PathProgramCache]: Analyzing trace with hash -567023772, now seen corresponding path program 1 times [2023-08-04 05:36:20,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:36:20,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535689790] [2023-08-04 05:36:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:36:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:36:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:36:20,216 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 05:36:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:36:20,252 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 05:36:20,252 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 05:36:20,252 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 05:36:20,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 05:36:20,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 05:36:20,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 05:36:20,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 05:36:20,253 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 05:36:20,253 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 05:36:20,254 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 05:36:20,254 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 05:36:20,299 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:36:20,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 213 transitions, 474 flow [2023-08-04 05:36:20,932 INFO L124 PetriNetUnfolderBase]: 282/4429 cut-off events. [2023-08-04 05:36:20,932 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 05:36:20,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4718 conditions, 4429 events. 282/4429 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 43226 event pairs, 0 based on Foata normal form. 0/3874 useless extension candidates. Maximal degree in co-relation 3197. Up to 162 conditions per place. [2023-08-04 05:36:20,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 213 transitions, 474 flow [2023-08-04 05:36:20,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 211 transitions, 462 flow [2023-08-04 05:36:20,982 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:36:20,983 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 211 transitions, 462 flow [2023-08-04 05:36:20,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 211 transitions, 462 flow [2023-08-04 05:36:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 211 transitions, 462 flow [2023-08-04 05:36:21,516 INFO L124 PetriNetUnfolderBase]: 282/4425 cut-off events. [2023-08-04 05:36:21,516 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-08-04 05:36:21,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4706 conditions, 4425 events. 282/4425 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 43328 event pairs, 0 based on Foata normal form. 0/3870 useless extension candidates. Maximal degree in co-relation 3185. Up to 162 conditions per place. [2023-08-04 05:36:21,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 11044 [2023-08-04 05:36:28,221 INFO L134 LiptonReduction]: Checked pairs total: 38275 [2023-08-04 05:36:28,221 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-04 05:36:28,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:36:28,224 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;@59c50f2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:36:28,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-04 05:36:28,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:36:28,227 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2023-08-04 05:36:28,227 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:36:28,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:36:28,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 05:36:28,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 05:36:28,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:36:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1389649775, now seen corresponding path program 1 times [2023-08-04 05:36:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:36:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856006281] [2023-08-04 05:36:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:36:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:36:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:36:28,279 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 05:36:28,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:36:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856006281] [2023-08-04 05:36:28,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856006281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:36:28,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:36:28,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:36:28,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821393] [2023-08-04 05:36:28,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:36:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:36:28,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:36:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:36:28,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:36:28,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 373 [2023-08-04 05:36:28,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:36:28,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:36:28,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 373 [2023-08-04 05:36:28,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand