/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_safe007_power.opt-thin001_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:39:57,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:39:57,906 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:39:57,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:39:57,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:39:57,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:39:57,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:39:57,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:39:57,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:39:57,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:39:57,946 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:39:57,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:39:57,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:39:57,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:39:57,948 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:39:57,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:39:57,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:39:57,949 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:39:57,949 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:39:57,949 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:39:57,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:39:57,950 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:39:57,950 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:39:57,950 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:39:57,951 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:39:57,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:39:57,952 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:39:57,952 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:39:57,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:39:57,953 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:39:57,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:39:57,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:39:57,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:39:57,954 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:39:57,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:39:57,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:39:57,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:39:57,955 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:39:57,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:39:57,955 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:39:57,956 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:39:57,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:39:58,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:39:58,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:39:58,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:39:58,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:39:58,221 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:39:58,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe007_power.opt-thin001_power.opt_bound2.i [2023-08-04 06:39:59,433 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:39:59,668 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:39:59,669 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe007_power.opt-thin001_power.opt_bound2.i [2023-08-04 06:39:59,686 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9581fc5e1/a902f7410239462f84785e42d9221895/FLAGe580ce18a [2023-08-04 06:39:59,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9581fc5e1/a902f7410239462f84785e42d9221895 [2023-08-04 06:39:59,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:39:59,708 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:39:59,711 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:39:59,711 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:39:59,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:39:59,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:39:59" (1/1) ... [2023-08-04 06:39:59,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596c60a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:39:59, skipping insertion in model container [2023-08-04 06:39:59,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:39:59" (1/1) ... [2023-08-04 06:39:59,767 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:39:59,888 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_safe007_power.opt-thin001_power.opt_bound2.i[969,982] [2023-08-04 06:40:00,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:40:00,112 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:40:00,124 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_safe007_power.opt-thin001_power.opt_bound2.i[969,982] [2023-08-04 06:40:00,144 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:40:00,146 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:40:00,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:40:00,211 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:40:00,211 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:40:00,217 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:40:00,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00 WrapperNode [2023-08-04 06:40:00,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:40:00,218 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:40:00,218 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:40:00,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:40:00,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,296 INFO L138 Inliner]: procedures = 176, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 206 [2023-08-04 06:40:00,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:40:00,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:40:00,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:40:00,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:40:00,310 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,323 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,324 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,339 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:40:00,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:40:00,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:40:00,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:40:00,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (1/1) ... [2023-08-04 06:40:00,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:40:00,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:40:00,386 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 06:40:00,404 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 06:40:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:40:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:40:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:40:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:40:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:40:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:40:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:40:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:40:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:40:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:40:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:40:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:40:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:40:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:40:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:40:00,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:40:00,432 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 06:40:00,584 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:40:00,586 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:40:00,988 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:40:01,245 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:40:01,246 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:40:01,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:40:01 BoogieIcfgContainer [2023-08-04 06:40:01,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:40:01,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:40:01,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:40:01,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:40:01,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:39:59" (1/3) ... [2023-08-04 06:40:01,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cc590e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:40:01, skipping insertion in model container [2023-08-04 06:40:01,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:40:00" (2/3) ... [2023-08-04 06:40:01,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cc590e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:40:01, skipping insertion in model container [2023-08-04 06:40:01,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:40:01" (3/3) ... [2023-08-04 06:40:01,259 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe007_power.opt-thin001_power.opt_bound2.i [2023-08-04 06:40:01,266 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:40:01,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:40:01,274 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 06:40:01,274 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:40:01,372 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:40:01,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:40:01,560 INFO L124 PetriNetUnfolderBase]: 30/468 cut-off events. [2023-08-04 06:40:01,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:40:01,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 468 events. 30/468 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1972 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 289. Up to 16 conditions per place. [2023-08-04 06:40:01,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:40:01,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 147 transitions, 307 flow [2023-08-04 06:40:01,579 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:40:01,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 147 transitions, 307 flow [2023-08-04 06:40:01,598 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 147 transitions, 307 flow [2023-08-04 06:40:01,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 147 transitions, 307 flow [2023-08-04 06:40:01,663 INFO L124 PetriNetUnfolderBase]: 30/467 cut-off events. [2023-08-04 06:40:01,664 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:40:01,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 467 events. 30/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1962 event pairs, 0 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2023-08-04 06:40:01,672 INFO L119 LiptonReduction]: Number of co-enabled transitions 2518 [2023-08-04 06:40:08,162 INFO L134 LiptonReduction]: Checked pairs total: 6965 [2023-08-04 06:40:08,162 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 06:40:08,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:40:08,183 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;@2f13d0a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:40:08,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:40:08,188 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:40:08,188 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-08-04 06:40:08,188 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:40:08,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:40:08,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:40:08,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:40:08,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:40:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 145147328, now seen corresponding path program 1 times [2023-08-04 06:40:08,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:40:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016172150] [2023-08-04 06:40:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:40:08,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:40:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:40:08,460 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 06:40:08,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:40:08,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016172150] [2023-08-04 06:40:08,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016172150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:40:08,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:40:08,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:40:08,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102324981] [2023-08-04 06:40:08,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:40:08,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:40:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:40:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:40:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:40:08,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 275 [2023-08-04 06:40:08,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:08,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:40:08,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 275 [2023-08-04 06:40:08,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:40:09,108 INFO L124 PetriNetUnfolderBase]: 1854/2961 cut-off events. [2023-08-04 06:40:09,108 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:40:09,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5886 conditions, 2961 events. 1854/2961 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16093 event pairs, 1523 based on Foata normal form. 105/2553 useless extension candidates. Maximal degree in co-relation 5873. Up to 2845 conditions per place. [2023-08-04 06:40:09,127 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 28 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 06:40:09,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 145 flow [2023-08-04 06:40:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:40:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:40:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-04 06:40:09,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054545454545455 [2023-08-04 06:40:09,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-04 06:40:09,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-04 06:40:09,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:40:09,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-04 06:40:09,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,162 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 79 flow. Second operand 3 states and 417 transitions. [2023-08-04 06:40:09,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 145 flow [2023-08-04 06:40:09,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 145 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:40:09,167 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 85 flow [2023-08-04 06:40:09,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-04 06:40:09,172 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 06:40:09,172 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 85 flow [2023-08-04 06:40:09,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:40:09,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:40:09,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:40:09,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:40:09,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:40:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash -520676707, now seen corresponding path program 1 times [2023-08-04 06:40:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:40:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843762938] [2023-08-04 06:40:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:40:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:40:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:40:09,291 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 06:40:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:40:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843762938] [2023-08-04 06:40:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843762938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:40:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037212882] [2023-08-04 06:40:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:40:09,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:40:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:40:09,301 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 06:40:09,306 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 06:40:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:40:09,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:40:09,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:40:09,441 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 06:40:09,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:40:09,458 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 06:40:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037212882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:40:09,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:40:09,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:40:09,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161995998] [2023-08-04 06:40:09,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:40:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:40:09,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:40:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:40:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:40:09,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 275 [2023-08-04 06:40:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 85 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:40:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 275 [2023-08-04 06:40:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:40:09,501 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:40:09,502 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:40:09,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 40. Up to 10 conditions per place. [2023-08-04 06:40:09,504 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:40:09,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 10 transitions, 47 flow [2023-08-04 06:40:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:40:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:40:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-04 06:40:09,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4709090909090909 [2023-08-04 06:40:09,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-04 06:40:09,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-04 06:40:09,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:40:09,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-04 06:40:09,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,516 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,516 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 85 flow. Second operand 4 states and 518 transitions. [2023-08-04 06:40:09,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 10 transitions, 47 flow [2023-08-04 06:40:09,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 06:40:09,517 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 06:40:09,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=12, 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=15, PETRI_TRANSITIONS=0} [2023-08-04 06:40:09,517 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -24 predicate places. [2023-08-04 06:40:09,518 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 06:40:09,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:09,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 06:40:09,521 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 06:40:09,521 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 06:40:09,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 06:40:09,727 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 06:40:09,728 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 06:40:09,730 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 06:40:09,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:40:09,782 INFO L124 PetriNetUnfolderBase]: 30/468 cut-off events. [2023-08-04 06:40:09,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:40:09,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 468 events. 30/468 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1972 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 289. Up to 16 conditions per place. [2023-08-04 06:40:09,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:40:09,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 119 transitions, 253 flow [2023-08-04 06:40:09,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:40:09,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 06:40:09,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 06:40:09,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 119 transitions, 253 flow [2023-08-04 06:40:09,806 INFO L124 PetriNetUnfolderBase]: 6/236 cut-off events. [2023-08-04 06:40:09,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:40:09,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 236 events. 6/236 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-04 06:40:09,808 INFO L119 LiptonReduction]: Number of co-enabled transitions 1312 [2023-08-04 06:40:15,149 INFO L134 LiptonReduction]: Checked pairs total: 3716 [2023-08-04 06:40:15,149 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-04 06:40:15,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:40:15,151 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;@2f13d0a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:40:15,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:40:15,155 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:40:15,155 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 06:40:15,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:40:15,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:40:15,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:40:15,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:40:15,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:40:15,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1253598672, now seen corresponding path program 1 times [2023-08-04 06:40:15,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:40:15,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482080091] [2023-08-04 06:40:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:40:15,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:40:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:40:15,180 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:40:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:40:15,228 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:40:15,228 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:40:15,228 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:40:15,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:40:15,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:40:15,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 06:40:15,229 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:40:15,230 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:40:15,230 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:40:15,230 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:40:15,277 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:40:15,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 172 transitions, 380 flow [2023-08-04 06:40:15,428 INFO L124 PetriNetUnfolderBase]: 93/1399 cut-off events. [2023-08-04 06:40:15,428 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:40:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1399 events. 93/1399 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9478 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1022. Up to 54 conditions per place. [2023-08-04 06:40:15,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 172 transitions, 380 flow [2023-08-04 06:40:15,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 171 transitions, 374 flow [2023-08-04 06:40:15,438 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:40:15,439 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 171 transitions, 374 flow [2023-08-04 06:40:15,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 171 transitions, 374 flow [2023-08-04 06:40:15,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 171 transitions, 374 flow [2023-08-04 06:40:15,587 INFO L124 PetriNetUnfolderBase]: 93/1398 cut-off events. [2023-08-04 06:40:15,587 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 06:40:15,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1494 conditions, 1398 events. 93/1398 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9478 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-04 06:40:15,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 6040 [2023-08-04 06:40:22,834 INFO L134 LiptonReduction]: Checked pairs total: 19707 [2023-08-04 06:40:22,835 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-04 06:40:22,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:40:22,837 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;@2f13d0a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:40:22,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:40:22,840 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:40:22,840 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-04 06:40:22,840 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:40:22,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:40:22,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:40:22,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:40:22,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:40:22,841 INFO L85 PathProgramCache]: Analyzing trace with hash -105780130, now seen corresponding path program 1 times [2023-08-04 06:40:22,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:40:22,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72393871] [2023-08-04 06:40:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:40:22,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:40:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:40:22,911 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 06:40:22,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:40:22,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72393871] [2023-08-04 06:40:22,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72393871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:40:22,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:40:22,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:40:22,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467511054] [2023-08-04 06:40:22,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:40:22,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:40:22,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:40:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:40:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:40:22,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 305 [2023-08-04 06:40:22,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:40:22,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:40:22,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 305 [2023-08-04 06:40:22,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:41:29,575 INFO L124 PetriNetUnfolderBase]: 381210/495667 cut-off events. [2023-08-04 06:41:29,575 INFO L125 PetriNetUnfolderBase]: For 7401/7401 co-relation queries the response was YES. [2023-08-04 06:41:30,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984430 conditions, 495667 events. 381210/495667 cut-off events. For 7401/7401 co-relation queries the response was YES. Maximal size of possible extension queue 13127. Compared 3398951 event pairs, 315492 based on Foata normal form. 10836/440689 useless extension candidates. Maximal degree in co-relation 284325. Up to 479788 conditions per place. [2023-08-04 06:41:32,861 INFO L140 encePairwiseOnDemand]: 301/305 looper letters, 43 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 06:41:32,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 230 flow [2023-08-04 06:41:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:41:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:41:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-04 06:41:32,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234972677595628 [2023-08-04 06:41:32,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-04 06:41:32,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-04 06:41:32,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:41:32,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-04 06:41:32,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:41:32,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:41:32,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:41:32,871 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 134 flow. Second operand 3 states and 479 transitions. [2023-08-04 06:41:32,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 54 transitions, 230 flow [2023-08-04 06:41:32,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 226 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 06:41:32,885 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 140 flow [2023-08-04 06:41:32,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-04 06:41:32,886 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-04 06:41:32,886 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 140 flow [2023-08-04 06:41:32,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:41:32,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:41:32,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:41:32,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 06:41:32,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:41:32,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:41:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1219425201, now seen corresponding path program 1 times [2023-08-04 06:41:32,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:41:32,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013518670] [2023-08-04 06:41:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:41:32,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:41:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:41:32,934 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 06:41:32,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:41:32,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013518670] [2023-08-04 06:41:32,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013518670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:41:32,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274720816] [2023-08-04 06:41:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:41:32,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:41:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:41:32,938 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 06:41:32,960 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 06:41:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:41:33,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:41:33,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:41:33,086 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 06:41:33,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:41:33,101 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 06:41:33,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274720816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:41:33,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:41:33,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:41:33,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181820422] [2023-08-04 06:41:33,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:41:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:41:33,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:41:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:41:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:41:33,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 305 [2023-08-04 06:41:33,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:41:33,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:41:33,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 305 [2023-08-04 06:41:33,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:42:20,293 INFO L124 PetriNetUnfolderBase]: 298234/384062 cut-off events. [2023-08-04 06:42:20,293 INFO L125 PetriNetUnfolderBase]: For 4983/4983 co-relation queries the response was YES. [2023-08-04 06:42:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762444 conditions, 384062 events. 298234/384062 cut-off events. For 4983/4983 co-relation queries the response was YES. Maximal size of possible extension queue 10633. Compared 2511314 event pairs, 199662 based on Foata normal form. 3/334736 useless extension candidates. Maximal degree in co-relation 270568. Up to 372130 conditions per place. [2023-08-04 06:42:22,851 INFO L140 encePairwiseOnDemand]: 301/305 looper letters, 46 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-08-04 06:42:22,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 59 transitions, 256 flow [2023-08-04 06:42:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:42:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:42:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2023-08-04 06:42:22,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510655737704918 [2023-08-04 06:42:22,855 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2023-08-04 06:42:22,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2023-08-04 06:42:22,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:42:22,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2023-08-04 06:42:22,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 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 06:42:22,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:22,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:22,860 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 140 flow. Second operand 4 states and 623 transitions. [2023-08-04 06:42:22,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 59 transitions, 256 flow [2023-08-04 06:42:22,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:42:22,863 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 152 flow [2023-08-04 06:42:22,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-04 06:42:22,867 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 06:42:22,867 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 152 flow [2023-08-04 06:42:22,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:22,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:22,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:42:22,877 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 06:42:23,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:42:23,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:42:23,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1217529697, now seen corresponding path program 1 times [2023-08-04 06:42:23,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:23,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190607561] [2023-08-04 06:42:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 06:42:23,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:42:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190607561] [2023-08-04 06:42:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190607561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:42:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:42:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:42:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188855036] [2023-08-04 06:42:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:42:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:42:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:42:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:42:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:42:23,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 305 [2023-08-04 06:42:23,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:23,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:42:23,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 305 [2023-08-04 06:42:23,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand