/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 18:22:58,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 18:22:58,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 18:22:58,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 18:22:58,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 18:22:58,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 18:22:58,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 18:22:58,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 18:22:58,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 18:22:58,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 18:22:58,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 18:22:58,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 18:22:58,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 18:22:58,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 18:22:58,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 18:22:58,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 18:22:58,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 18:22:58,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 18:22:58,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 18:22:58,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 18:22:58,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 18:22:58,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 18:22:58,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 18:22:58,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 18:22:58,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 18:22:58,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 18:22:58,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 18:22:58,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 18:22:58,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 18:22:58,480 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 18:22:58,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 18:22:58,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 18:22:58,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 18:22:58,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 18:22:58,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 18:22:58,483 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 18:22:58,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 18:22:58,483 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 18:22:58,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 18:22:58,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 18:22:58,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 18:22:58,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 18:22:58,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 18:22:58,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 18:22:58,485 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 18:22:58,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 18:22:58,485 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 18:22:58,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 18:22:58,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 18:22:58,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 18:22:58,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 18:22:58,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 18:22:58,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 18:22:58,486 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 18:22:58,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 18:22:58,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 18:22:58,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 18:22:58,713 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 18:22:58,713 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 18:22:58,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-01-27 18:22:59,790 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 18:23:00,112 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 18:23:00,113 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-01-27 18:23:00,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6875d6cd3/830fd164fa894554a9c0cd2fb9ae0cbe/FLAG8a7e4102f [2023-01-27 18:23:00,152 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6875d6cd3/830fd164fa894554a9c0cd2fb9ae0cbe [2023-01-27 18:23:00,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 18:23:00,156 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 18:23:00,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 18:23:00,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 18:23:00,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 18:23:00,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:00,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6120e77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00, skipping insertion in model container [2023-01-27 18:23:00,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:00,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 18:23:00,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 18:23:00,727 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-01-27 18:23:00,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 18:23:00,742 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 18:23:00,812 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-01-27 18:23:00,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 18:23:00,913 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 18:23:00,913 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 18:23:00,919 INFO L208 MainTranslator]: Completed translation [2023-01-27 18:23:00,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00 WrapperNode [2023-01-27 18:23:00,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 18:23:00,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 18:23:00,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 18:23:00,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 18:23:00,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:00,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,027 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2023-01-27 18:23:01,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 18:23:01,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 18:23:01,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 18:23:01,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 18:23:01,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 18:23:01,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 18:23:01,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 18:23:01,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 18:23:01,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (1/1) ... [2023-01-27 18:23:01,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 18:23:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 18:23:01,117 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) [2023-01-27 18:23:01,118 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 [2023-01-27 18:23:01,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 18:23:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 18:23:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 18:23:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 18:23:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 18:23:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-01-27 18:23:01,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-01-27 18:23:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 18:23:01,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 18:23:01,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 18:23:01,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 18:23:01,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 18:23:01,150 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 18:23:01,562 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 18:23:01,564 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 18:23:01,829 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 18:23:01,868 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 18:23:01,869 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-01-27 18:23:01,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 06:23:01 BoogieIcfgContainer [2023-01-27 18:23:01,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 18:23:01,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 18:23:01,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 18:23:01,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 18:23:01,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 06:23:00" (1/3) ... [2023-01-27 18:23:01,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8294621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 06:23:01, skipping insertion in model container [2023-01-27 18:23:01,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:23:00" (2/3) ... [2023-01-27 18:23:01,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8294621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 06:23:01, skipping insertion in model container [2023-01-27 18:23:01,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 06:23:01" (3/3) ... [2023-01-27 18:23:01,877 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-01-27 18:23:01,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 18:23:01,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 18:23:01,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 18:23:01,964 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 18:23:01,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 248 transitions, 504 flow [2023-01-27 18:23:02,055 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2023-01-27 18:23:02,056 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 18:23:02,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 262 events. 19/262 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-27 18:23:02,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 248 transitions, 504 flow [2023-01-27 18:23:02,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 243 transitions, 491 flow [2023-01-27 18:23:02,074 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:23:02,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-27 18:23:02,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-27 18:23:02,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 243 transitions, 491 flow [2023-01-27 18:23:02,126 INFO L130 PetriNetUnfolder]: 18/257 cut-off events. [2023-01-27 18:23:02,126 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:23:02,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 257 events. 18/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 373 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-27 18:23:02,132 INFO L119 LiptonReduction]: Number of co-enabled transitions 6520 [2023-01-27 18:23:08,670 INFO L134 LiptonReduction]: Checked pairs total: 6702 [2023-01-27 18:23:08,671 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-01-27 18:23:08,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:23:08,691 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=false, 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;@47bd7229, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:23:08,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 18:23:08,698 INFO L130 PetriNetUnfolder]: 1/14 cut-off events. [2023-01-27 18:23:08,698 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:23:08,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:08,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-27 18:23:08,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 18:23:08,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:08,704 INFO L85 PathProgramCache]: Analyzing trace with hash -775278274, now seen corresponding path program 1 times [2023-01-27 18:23:08,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:08,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408058884] [2023-01-27 18:23:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:23:09,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:23:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408058884] [2023-01-27 18:23:09,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408058884] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:23:09,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:23:09,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:23:09,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496084463] [2023-01-27 18:23:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:23:09,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:23:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:23:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:23:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:23:09,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-27 18:23:09,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:23:09,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-27 18:23:09,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:23:09,231 INFO L130 PetriNetUnfolder]: 82/169 cut-off events. [2023-01-27 18:23:09,231 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:23:09,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 470 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-01-27 18:23:09,236 INFO L137 encePairwiseOnDemand]: 483/490 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-01-27 18:23:09,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2023-01-27 18:23:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:23:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:23:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-01-27 18:23:09,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2023-01-27 18:23:09,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-01-27 18:23:09,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-01-27 18:23:09,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:23:09,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-01-27 18:23:09,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,272 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 695 transitions. [2023-01-27 18:23:09,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2023-01-27 18:23:09,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 18:23:09,276 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 83 flow [2023-01-27 18:23:09,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-01-27 18:23:09,283 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-27 18:23:09,284 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 83 flow [2023-01-27 18:23:09,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:09,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:23:09,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 18:23:09,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 18:23:09,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1198421338, now seen corresponding path program 1 times [2023-01-27 18:23:09,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:09,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276386208] [2023-01-27 18:23:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:09,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:23:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:23:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276386208] [2023-01-27 18:23:09,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276386208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 18:23:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744748959] [2023-01-27 18:23:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:09,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 18:23:09,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 18:23:09,477 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) [2023-01-27 18:23:09,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 18:23:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-27 18:23:09,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 18:23:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:23:09,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 18:23:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:23:09,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744748959] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 18:23:09,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 18:23:09,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-01-27 18:23:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842981079] [2023-01-27 18:23:09,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 18:23:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 18:23:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:23:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 18:23:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-27 18:23:09,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-27 18:23:09,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 83 flow. Second operand has 8 states, 8 states have (on average 220.5) internal successors, (1764), 8 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:23:09,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-27 18:23:09,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:23:09,861 INFO L130 PetriNetUnfolder]: 82/170 cut-off events. [2023-01-27 18:23:09,861 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:23:09,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 170 events. 82/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 470 event pairs, 57 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 341. Up to 167 conditions per place. [2023-01-27 18:23:09,862 INFO L137 encePairwiseOnDemand]: 487/490 looper letters, 31 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-01-27 18:23:09,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 155 flow [2023-01-27 18:23:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 18:23:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 18:23:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 911 transitions. [2023-01-27 18:23:09,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46479591836734696 [2023-01-27 18:23:09,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 911 transitions. [2023-01-27 18:23:09,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 911 transitions. [2023-01-27 18:23:09,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:23:09,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 911 transitions. [2023-01-27 18:23:09,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.75) internal successors, (911), 4 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,876 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 83 flow. Second operand 4 states and 911 transitions. [2023-01-27 18:23:09,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 155 flow [2023-01-27 18:23:09,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 18:23:09,878 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-01-27 18:23:09,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-01-27 18:23:09,879 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-01-27 18:23:09,879 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-01-27 18:23:09,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 220.5) internal successors, (1764), 8 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:09,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:09,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-01-27 18:23:09,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 18:23:10,086 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 [2023-01-27 18:23:10,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 18:23:10,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1430954434, now seen corresponding path program 2 times [2023-01-27 18:23:10,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:10,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065185997] [2023-01-27 18:23:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:10,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:23:10,125 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:23:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:23:10,194 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:23:10,194 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:23:10,196 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 18:23:10,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 18:23:10,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 18:23:10,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 18:23:10,202 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-27 18:23:10,205 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:23:10,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 18:23:10,284 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 18:23:10,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-01-27 18:23:10,375 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-01-27 18:23:10,375 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 18:23:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 463 events. 36/463 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1452 event pairs, 0 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 358. Up to 8 conditions per place. [2023-01-27 18:23:10,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 388 places, 413 transitions, 844 flow [2023-01-27 18:23:10,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 413 transitions, 844 flow [2023-01-27 18:23:10,387 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:23:10,387 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 388 places, 413 transitions, 844 flow [2023-01-27 18:23:10,388 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 388 places, 413 transitions, 844 flow [2023-01-27 18:23:10,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-01-27 18:23:10,453 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-01-27 18:23:10,454 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 18:23:10,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 463 events. 36/463 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1452 event pairs, 0 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 358. Up to 8 conditions per place. [2023-01-27 18:23:10,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 69764 [2023-01-27 18:23:19,507 INFO L134 LiptonReduction]: Checked pairs total: 82796 [2023-01-27 18:23:19,507 INFO L136 LiptonReduction]: Total number of compositions: 396 [2023-01-27 18:23:19,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:23:19,510 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=false, 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;@47bd7229, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:23:19,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 18:23:19,513 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-01-27 18:23:19,513 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 18:23:19,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:19,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:23:19,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 18:23:19,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:19,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2086585592, now seen corresponding path program 1 times [2023-01-27 18:23:19,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:19,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459747160] [2023-01-27 18:23:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:19,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:23:19,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:23:19,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459747160] [2023-01-27 18:23:19,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459747160] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:23:19,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:23:19,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:23:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246825005] [2023-01-27 18:23:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:23:19,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:23:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:23:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:23:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:23:19,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 809 [2023-01-27 18:23:19,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:19,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:23:19,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 809 [2023-01-27 18:23:19,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:23:20,802 INFO L130 PetriNetUnfolder]: 8425/12461 cut-off events. [2023-01-27 18:23:20,802 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2023-01-27 18:23:20,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24907 conditions, 12461 events. 8425/12461 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 68317 event pairs, 6567 based on Foata normal form. 0/9028 useless extension candidates. Maximal degree in co-relation 20102. Up to 12304 conditions per place. [2023-01-27 18:23:20,862 INFO L137 encePairwiseOnDemand]: 801/809 looper letters, 71 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-01-27 18:23:20,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 318 flow [2023-01-27 18:23:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:23:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:23:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1186 transitions. [2023-01-27 18:23:20,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48866913885455293 [2023-01-27 18:23:20,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1186 transitions. [2023-01-27 18:23:20,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1186 transitions. [2023-01-27 18:23:20,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:23:20,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1186 transitions. [2023-01-27 18:23:20,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:20,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:20,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:20,882 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 180 flow. Second operand 3 states and 1186 transitions. [2023-01-27 18:23:20,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 318 flow [2023-01-27 18:23:20,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 18:23:20,887 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 182 flow [2023-01-27 18:23:20,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-01-27 18:23:20,889 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-01-27 18:23:20,889 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 182 flow [2023-01-27 18:23:20,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:20,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:20,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:23:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 18:23:20,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 18:23:20,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -21146749, now seen corresponding path program 1 times [2023-01-27 18:23:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:20,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416094428] [2023-01-27 18:23:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:23:20,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:23:20,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416094428] [2023-01-27 18:23:20,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416094428] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:23:20,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:23:20,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:23:20,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289199450] [2023-01-27 18:23:20,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:23:20,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:23:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:23:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:23:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:23:20,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 809 [2023-01-27 18:23:20,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 376.6666666666667) internal successors, (1130), 3 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:20,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:23:20,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 809 [2023-01-27 18:23:20,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:23:22,697 INFO L130 PetriNetUnfolder]: 12502/18300 cut-off events. [2023-01-27 18:23:22,697 INFO L131 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2023-01-27 18:23:22,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36690 conditions, 18300 events. 12502/18300 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 103723 event pairs, 6567 based on Foata normal form. 0/13316 useless extension candidates. Maximal degree in co-relation 36677. Up to 12154 conditions per place. [2023-01-27 18:23:22,781 INFO L137 encePairwiseOnDemand]: 805/809 looper letters, 122 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2023-01-27 18:23:22,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 129 transitions, 544 flow [2023-01-27 18:23:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:23:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:23:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1244 transitions. [2023-01-27 18:23:22,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125669550885867 [2023-01-27 18:23:22,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1244 transitions. [2023-01-27 18:23:22,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1244 transitions. [2023-01-27 18:23:22,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:23:22,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1244 transitions. [2023-01-27 18:23:22,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 414.6666666666667) internal successors, (1244), 3 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:22,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:22,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:22,795 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 182 flow. Second operand 3 states and 1244 transitions. [2023-01-27 18:23:22,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 129 transitions, 544 flow [2023-01-27 18:23:22,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 540 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 18:23:22,799 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 204 flow [2023-01-27 18:23:22,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2023-01-27 18:23:22,800 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2023-01-27 18:23:22,800 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 204 flow [2023-01-27 18:23:22,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 376.6666666666667) internal successors, (1130), 3 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:22,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:22,801 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:23:22,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 18:23:22,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 18:23:22,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash -190819178, now seen corresponding path program 1 times [2023-01-27 18:23:22,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:22,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725455266] [2023-01-27 18:23:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:23:22,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:23:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725455266] [2023-01-27 18:23:22,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725455266] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 18:23:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644383802] [2023-01-27 18:23:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 18:23:22,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 18:23:22,905 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) [2023-01-27 18:23:22,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 18:23:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:23,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-27 18:23:23,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 18:23:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:23:23,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 18:23:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 18:23:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644383802] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 18:23:23,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 18:23:23,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-01-27 18:23:23,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514408644] [2023-01-27 18:23:23,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 18:23:23,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 18:23:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:23:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 18:23:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-27 18:23:23,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 809 [2023-01-27 18:23:23,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 370.625) internal successors, (2965), 8 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:23,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:23:23,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 809 [2023-01-27 18:23:23,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:23:24,821 INFO L130 PetriNetUnfolder]: 12502/18373 cut-off events. [2023-01-27 18:23:24,821 INFO L131 PetriNetUnfolder]: For 1578/1578 co-relation queries the response was YES. [2023-01-27 18:23:24,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38274 conditions, 18373 events. 12502/18373 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 102847 event pairs, 9747 based on Foata normal form. 0/13830 useless extension candidates. Maximal degree in co-relation 38253. Up to 18193 conditions per place. [2023-01-27 18:23:24,911 INFO L137 encePairwiseOnDemand]: 806/809 looper letters, 74 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-01-27 18:23:24,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 362 flow [2023-01-27 18:23:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 18:23:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 18:23:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1551 transitions. [2023-01-27 18:23:24,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47929542645241036 [2023-01-27 18:23:24,916 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1551 transitions. [2023-01-27 18:23:24,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1551 transitions. [2023-01-27 18:23:24,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:23:24,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1551 transitions. [2023-01-27 18:23:24,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 387.75) internal successors, (1551), 4 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:24,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 809.0) internal successors, (4045), 5 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:24,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 809.0) internal successors, (4045), 5 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:24,929 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 204 flow. Second operand 4 states and 1551 transitions. [2023-01-27 18:23:24,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 362 flow [2023-01-27 18:23:24,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:23:24,952 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 214 flow [2023-01-27 18:23:24,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-01-27 18:23:24,957 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2023-01-27 18:23:24,958 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 214 flow [2023-01-27 18:23:24,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 370.625) internal successors, (2965), 8 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:24,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:24,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 18:23:24,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 18:23:25,166 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,SelfDestructingSolverStorable5 [2023-01-27 18:23:25,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 18:23:25,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1757769597, now seen corresponding path program 2 times [2023-01-27 18:23:25,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:25,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952067292] [2023-01-27 18:23:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:25,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:23:25,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:23:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:23:25,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:23:25,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:23:25,234 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 18:23:25,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 18:23:25,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 18:23:25,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 18:23:25,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 18:23:25,235 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-01-27 18:23:25,237 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:23:25,237 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 18:23:25,318 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 18:23:25,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-01-27 18:23:25,480 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-01-27 18:23:25,480 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 18:23:25,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-01-27 18:23:25,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 542 places, 578 transitions, 1186 flow [2023-01-27 18:23:25,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 542 places, 578 transitions, 1186 flow [2023-01-27 18:23:25,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:23:25,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 542 places, 578 transitions, 1186 flow [2023-01-27 18:23:25,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 542 places, 578 transitions, 1186 flow [2023-01-27 18:23:25,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-01-27 18:23:25,712 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-01-27 18:23:25,712 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 18:23:25,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-01-27 18:23:25,772 INFO L119 LiptonReduction]: Number of co-enabled transitions 185820 [2023-01-27 18:23:36,653 INFO L134 LiptonReduction]: Checked pairs total: 211500 [2023-01-27 18:23:36,653 INFO L136 LiptonReduction]: Total number of compositions: 551 [2023-01-27 18:23:36,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:23:36,655 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=false, 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;@47bd7229, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:23:36,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 18:23:36,657 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-01-27 18:23:36,657 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 18:23:36,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:23:36,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:23:36,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:23:36,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:23:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1655510194, now seen corresponding path program 1 times [2023-01-27 18:23:36,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:23:36,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280908475] [2023-01-27 18:23:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:23:36,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:23:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:23:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:23:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:23:36,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280908475] [2023-01-27 18:23:36,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280908475] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:23:36,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:23:36,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:23:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764744071] [2023-01-27 18:23:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:23:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 18:23:36,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:23:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 18:23:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 18:23:36,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 1129 [2023-01-27 18:23:36,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 534.0) internal successors, (1068), 2 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:23:36,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:23:36,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 1129 [2023-01-27 18:23:36,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:24:04,708 INFO L130 PetriNetUnfolder]: 332985/433382 cut-off events. [2023-01-27 18:24:04,708 INFO L131 PetriNetUnfolder]: For 9466/9466 co-relation queries the response was YES. [2023-01-27 18:24:05,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870688 conditions, 433382 events. 332985/433382 cut-off events. For 9466/9466 co-relation queries the response was YES. Maximal size of possible extension queue 7295. Compared 2708815 event pairs, 262039 based on Foata normal form. 0/318876 useless extension candidates. Maximal degree in co-relation 188798. Up to 432539 conditions per place. [2023-01-27 18:24:06,960 INFO L137 encePairwiseOnDemand]: 1120/1129 looper letters, 104 selfloop transitions, 0 changer transitions 0/107 dead transitions. [2023-01-27 18:24:06,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 107 transitions, 452 flow [2023-01-27 18:24:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 18:24:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 18:24:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1173 transitions. [2023-01-27 18:24:06,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194862710363153 [2023-01-27 18:24:06,964 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1173 transitions. [2023-01-27 18:24:06,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1173 transitions. [2023-01-27 18:24:06,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:24:06,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1173 transitions. [2023-01-27 18:24:06,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 586.5) internal successors, (1173), 2 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:06,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1129.0) internal successors, (3387), 3 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:06,971 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1129.0) internal successors, (3387), 3 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:06,971 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 262 flow. Second operand 2 states and 1173 transitions. [2023-01-27 18:24:06,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 107 transitions, 452 flow [2023-01-27 18:24:06,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 107 transitions, 452 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 18:24:06,975 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 244 flow [2023-01-27 18:24:06,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=244, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2023-01-27 18:24:06,976 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2023-01-27 18:24:06,976 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 244 flow [2023-01-27 18:24:06,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 534.0) internal successors, (1068), 2 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:06,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:24:06,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:24:06,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 18:24:06,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:24:06,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:24:06,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1803259507, now seen corresponding path program 1 times [2023-01-27 18:24:06,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:24:06,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276606612] [2023-01-27 18:24:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:24:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:24:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:24:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 18:24:07,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:24:07,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276606612] [2023-01-27 18:24:07,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276606612] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:24:07,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:24:07,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:24:07,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628126081] [2023-01-27 18:24:07,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:24:07,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:24:07,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:24:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:24:07,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:24:07,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 523 out of 1129 [2023-01-27 18:24:07,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 526.3333333333334) internal successors, (1579), 3 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:07,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:24:07,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 523 of 1129 [2023-01-27 18:24:07,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:24:47,318 INFO L130 PetriNetUnfolder]: 492231/638934 cut-off events. [2023-01-27 18:24:47,318 INFO L131 PetriNetUnfolder]: For 13219/13219 co-relation queries the response was YES. [2023-01-27 18:24:48,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283796 conditions, 638934 events. 492231/638934 cut-off events. For 13219/13219 co-relation queries the response was YES. Maximal size of possible extension queue 9103. Compared 4143139 event pairs, 262039 based on Foata normal form. 0/471862 useless extension candidates. Maximal degree in co-relation 1283790. Up to 428661 conditions per place. [2023-01-27 18:24:50,194 INFO L137 encePairwiseOnDemand]: 1125/1129 looper letters, 185 selfloop transitions, 3 changer transitions 0/191 dead transitions. [2023-01-27 18:24:50,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 191 transitions, 806 flow [2023-01-27 18:24:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:24:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:24:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1758 transitions. [2023-01-27 18:24:50,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190434012400355 [2023-01-27 18:24:50,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1758 transitions. [2023-01-27 18:24:50,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1758 transitions. [2023-01-27 18:24:50,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:24:50,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1758 transitions. [2023-01-27 18:24:50,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 586.0) internal successors, (1758), 3 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:50,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:50,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:50,209 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 244 flow. Second operand 3 states and 1758 transitions. [2023-01-27 18:24:50,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 191 transitions, 806 flow [2023-01-27 18:24:50,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 191 transitions, 806 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 18:24:50,214 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 270 flow [2023-01-27 18:24:50,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2023-01-27 18:24:50,215 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-01-27 18:24:50,215 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 270 flow [2023-01-27 18:24:50,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 526.3333333333334) internal successors, (1579), 3 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:50,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:24:50,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:24:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 18:24:50,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:24:50,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:24:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash 962460702, now seen corresponding path program 1 times [2023-01-27 18:24:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:24:50,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925973716] [2023-01-27 18:24:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:24:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:24:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:24:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:24:50,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:24:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925973716] [2023-01-27 18:24:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925973716] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:24:50,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:24:50,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:24:50,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20082749] [2023-01-27 18:24:50,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:24:50,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:24:50,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:24:50,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:24:50,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:24:50,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1129 [2023-01-27 18:24:50,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 445.0) internal successors, (1335), 3 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:24:50,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:24:50,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1129 [2023-01-27 18:24:50,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:25:43,629 INFO L130 PetriNetUnfolder]: 601322/782909 cut-off events. [2023-01-27 18:25:43,630 INFO L131 PetriNetUnfolder]: For 73644/73644 co-relation queries the response was YES. [2023-01-27 18:25:45,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620835 conditions, 782909 events. 601322/782909 cut-off events. For 73644/73644 co-relation queries the response was YES. Maximal size of possible extension queue 11507. Compared 5199234 event pairs, 352753 based on Foata normal form. 0/600394 useless extension candidates. Maximal degree in co-relation 1620827. Up to 654441 conditions per place. [2023-01-27 18:25:47,636 INFO L137 encePairwiseOnDemand]: 1111/1129 looper letters, 167 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2023-01-27 18:25:47,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 187 transitions, 825 flow [2023-01-27 18:25:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:25:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:25:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1502 transitions. [2023-01-27 18:25:47,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44346028934160026 [2023-01-27 18:25:47,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1502 transitions. [2023-01-27 18:25:47,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1502 transitions. [2023-01-27 18:25:47,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:25:47,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1502 transitions. [2023-01-27 18:25:47,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:25:47,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:25:47,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:25:47,650 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 270 flow. Second operand 3 states and 1502 transitions. [2023-01-27 18:25:47,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 187 transitions, 825 flow [2023-01-27 18:25:50,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 187 transitions, 813 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:25:50,410 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 400 flow [2023-01-27 18:25:50,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2023-01-27 18:25:50,410 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 7 predicate places. [2023-01-27 18:25:50,411 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 400 flow [2023-01-27 18:25:50,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 445.0) internal successors, (1335), 3 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:25:50,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:25:50,412 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-27 18:25:50,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 18:25:50,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:25:50,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:25:50,412 INFO L85 PathProgramCache]: Analyzing trace with hash 698955491, now seen corresponding path program 1 times [2023-01-27 18:25:50,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:25:50,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982078230] [2023-01-27 18:25:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:25:50,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:25:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:25:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:25:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:25:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982078230] [2023-01-27 18:25:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982078230] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:25:50,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:25:50,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:25:50,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076793504] [2023-01-27 18:25:50,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:25:50,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:25:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:25:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:25:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:25:50,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1129 [2023-01-27 18:25:50,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 521.3333333333334) internal successors, (1564), 3 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:25:50,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:25:50,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1129 [2023-01-27 18:25:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:26:47,828 INFO L130 PetriNetUnfolder]: 601322/783079 cut-off events. [2023-01-27 18:26:47,828 INFO L131 PetriNetUnfolder]: For 163175/163175 co-relation queries the response was YES. [2023-01-27 18:26:49,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794870 conditions, 783079 events. 601322/783079 cut-off events. For 163175/163175 co-relation queries the response was YES. Maximal size of possible extension queue 11514. Compared 5162160 event pairs, 448329 based on Foata normal form. 0/647802 useless extension candidates. Maximal degree in co-relation 1794861. Up to 781524 conditions per place. [2023-01-27 18:26:51,893 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 122 selfloop transitions, 2 changer transitions 0/127 dead transitions. [2023-01-27 18:26:51,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 127 transitions, 650 flow [2023-01-27 18:26:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:26:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:26:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1663 transitions. [2023-01-27 18:26:51,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49099498080897547 [2023-01-27 18:26:51,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1663 transitions. [2023-01-27 18:26:51,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1663 transitions. [2023-01-27 18:26:51,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:26:51,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1663 transitions. [2023-01-27 18:26:51,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 554.3333333333334) internal successors, (1663), 3 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:26:51,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:26:51,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:26:51,905 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 400 flow. Second operand 3 states and 1663 transitions. [2023-01-27 18:26:51,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 127 transitions, 650 flow [2023-01-27 18:27:13,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 616 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:27:13,122 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 378 flow [2023-01-27 18:27:13,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=378, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2023-01-27 18:27:13,123 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2023-01-27 18:27:13,123 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 378 flow [2023-01-27 18:27:13,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 521.3333333333334) internal successors, (1564), 3 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:27:13,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:27:13,124 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:27:13,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 18:27:13,124 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:27:13,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:27:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1296553055, now seen corresponding path program 1 times [2023-01-27 18:27:13,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:27:13,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473560876] [2023-01-27 18:27:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:27:13,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:27:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:27:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:27:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:27:13,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473560876] [2023-01-27 18:27:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473560876] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 18:27:13,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539200809] [2023-01-27 18:27:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:27:13,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 18:27:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 18:27:13,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 18:27:13,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 18:27:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:27:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-27 18:27:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 18:27:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:27:13,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 18:27:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 18:27:13,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539200809] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 18:27:13,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 18:27:13,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 18:27:13,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529861311] [2023-01-27 18:27:13,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 18:27:13,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 18:27:13,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:27:13,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 18:27:13,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-01-27 18:27:13,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1129 [2023-01-27 18:27:13,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 520.8571428571429) internal successors, (3646), 7 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:27:13,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:27:13,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1129 [2023-01-27 18:27:13,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:28:10,047 INFO L130 PetriNetUnfolder]: 601322/783080 cut-off events. [2023-01-27 18:28:10,047 INFO L131 PetriNetUnfolder]: For 105476/105476 co-relation queries the response was YES. [2023-01-27 18:28:11,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755980 conditions, 783080 events. 601322/783080 cut-off events. For 105476/105476 co-relation queries the response was YES. Maximal size of possible extension queue 11514. Compared 5162715 event pairs, 448329 based on Foata normal form. 0/642118 useless extension candidates. Maximal degree in co-relation 1755970. Up to 781524 conditions per place. [2023-01-27 18:28:14,306 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 122 selfloop transitions, 3 changer transitions 0/128 dead transitions. [2023-01-27 18:28:14,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 632 flow [2023-01-27 18:28:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 18:28:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 18:28:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2183 transitions. [2023-01-27 18:28:14,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48339238263950396 [2023-01-27 18:28:14,311 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2183 transitions. [2023-01-27 18:28:14,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2183 transitions. [2023-01-27 18:28:14,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:28:14,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2183 transitions. [2023-01-27 18:28:14,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 545.75) internal successors, (2183), 4 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:28:14,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1129.0) internal successors, (5645), 5 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:28:14,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1129.0) internal successors, (5645), 5 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:28:14,320 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 378 flow. Second operand 4 states and 2183 transitions. [2023-01-27 18:28:14,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 632 flow [2023-01-27 18:28:14,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 128 transitions, 628 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 18:28:14,365 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 390 flow [2023-01-27 18:28:14,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2023-01-27 18:28:14,365 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2023-01-27 18:28:14,366 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 390 flow [2023-01-27 18:28:14,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 520.8571428571429) internal successors, (3646), 7 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:28:14,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:28:14,367 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 18:28:14,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 18:28:14,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 18:28:14,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:28:14,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:28:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1652758941, now seen corresponding path program 2 times [2023-01-27 18:28:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:28:14,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072902737] [2023-01-27 18:28:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:28:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:28:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:28:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 18:28:14,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:28:14,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072902737] [2023-01-27 18:28:14,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072902737] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 18:28:14,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565214943] [2023-01-27 18:28:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 18:28:14,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 18:28:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 18:28:14,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 18:28:14,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 18:28:14,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 18:28:14,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 18:28:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-27 18:28:14,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 18:28:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 18:28:14,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 18:28:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565214943] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:28:14,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 18:28:14,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-01-27 18:28:14,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504591128] [2023-01-27 18:28:14,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:28:14,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 18:28:14,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:28:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 18:28:14,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-01-27 18:28:14,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 516 out of 1129 [2023-01-27 18:28:14,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 390 flow. Second operand has 6 states, 6 states have (on average 518.1666666666666) internal successors, (3109), 6 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:28:14,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:28:14,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 516 of 1129 [2023-01-27 18:28:14,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:29:08,105 INFO L130 PetriNetUnfolder]: 508449/667139 cut-off events. [2023-01-27 18:29:08,106 INFO L131 PetriNetUnfolder]: For 91132/91132 co-relation queries the response was YES. [2023-01-27 18:29:09,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1470797 conditions, 667139 events. 508449/667139 cut-off events. For 91132/91132 co-relation queries the response was YES. Maximal size of possible extension queue 10078. Compared 4624293 event pairs, 60837 based on Foata normal form. 27528/568949 useless extension candidates. Maximal degree in co-relation 1470786. Up to 269982 conditions per place. [2023-01-27 18:29:11,644 INFO L137 encePairwiseOnDemand]: 1122/1129 looper letters, 448 selfloop transitions, 12 changer transitions 6/468 dead transitions. [2023-01-27 18:29:11,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 468 transitions, 2258 flow [2023-01-27 18:29:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 18:29:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 18:29:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3489 transitions. [2023-01-27 18:29:11,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150575730735164 [2023-01-27 18:29:11,649 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3489 transitions. [2023-01-27 18:29:11,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3489 transitions. [2023-01-27 18:29:11,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:29:11,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3489 transitions. [2023-01-27 18:29:11,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 581.5) internal successors, (3489), 6 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:29:11,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:29:11,662 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:29:11,662 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 390 flow. Second operand 6 states and 3489 transitions. [2023-01-27 18:29:11,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 468 transitions, 2258 flow [2023-01-27 18:29:12,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 468 transitions, 2242 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-01-27 18:29:12,042 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 419 flow [2023-01-27 18:29:12,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=419, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2023-01-27 18:29:12,043 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 12 predicate places. [2023-01-27 18:29:12,043 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 419 flow [2023-01-27 18:29:12,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 518.1666666666666) internal successors, (3109), 6 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:29:12,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:29:12,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:29:12,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 18:29:12,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 18:29:12,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:29:12,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:29:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash 253686905, now seen corresponding path program 1 times [2023-01-27 18:29:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:29:12,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232372961] [2023-01-27 18:29:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:29:12,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:29:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:29:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 18:29:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:29:12,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232372961] [2023-01-27 18:29:12,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232372961] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:29:12,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:29:12,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:29:12,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524852419] [2023-01-27 18:29:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:29:12,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:29:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:29:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:29:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:29:12,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1129 [2023-01-27 18:29:12,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 419 flow. Second operand has 3 states, 3 states have (on average 447.0) internal successors, (1341), 3 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:29:12,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:29:12,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1129 [2023-01-27 18:29:12,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:30:11,212 INFO L130 PetriNetUnfolder]: 583729/764821 cut-off events. [2023-01-27 18:30:11,213 INFO L131 PetriNetUnfolder]: For 350886/350886 co-relation queries the response was YES. [2023-01-27 18:30:13,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857336 conditions, 764821 events. 583729/764821 cut-off events. For 350886/350886 co-relation queries the response was YES. Maximal size of possible extension queue 11586. Compared 5173129 event pairs, 358586 based on Foata normal form. 0/660457 useless extension candidates. Maximal degree in co-relation 1857325. Up to 672087 conditions per place. [2023-01-27 18:30:15,784 INFO L137 encePairwiseOnDemand]: 1110/1129 looper letters, 192 selfloop transitions, 28 changer transitions 4/226 dead transitions. [2023-01-27 18:30:15,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 226 transitions, 1142 flow [2023-01-27 18:30:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:30:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:30:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1503 transitions. [2023-01-27 18:30:15,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437555358724535 [2023-01-27 18:30:15,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1503 transitions. [2023-01-27 18:30:15,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1503 transitions. [2023-01-27 18:30:15,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:30:15,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1503 transitions. [2023-01-27 18:30:15,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:30:15,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:30:15,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:30:15,792 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 419 flow. Second operand 3 states and 1503 transitions. [2023-01-27 18:30:15,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 226 transitions, 1142 flow [2023-01-27 18:30:16,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 226 transitions, 1137 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 18:30:16,939 INFO L231 Difference]: Finished difference. Result has 107 places, 159 transitions, 672 flow [2023-01-27 18:30:16,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=672, PETRI_PLACES=107, PETRI_TRANSITIONS=159} [2023-01-27 18:30:16,939 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 15 predicate places. [2023-01-27 18:30:16,939 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 159 transitions, 672 flow [2023-01-27 18:30:16,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 447.0) internal successors, (1341), 3 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:30:16,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:30:16,940 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:30:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-27 18:30:16,940 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:30:16,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:30:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2071016609, now seen corresponding path program 1 times [2023-01-27 18:30:16,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:30:16,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625877780] [2023-01-27 18:30:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:30:16,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:30:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:30:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 18:30:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:30:17,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625877780] [2023-01-27 18:30:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625877780] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:30:17,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:30:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:30:17,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835829754] [2023-01-27 18:30:17,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:30:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:30:17,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:30:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:30:17,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:30:17,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 1129 [2023-01-27 18:30:17,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 159 transitions, 672 flow. Second operand has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:30:17,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:30:17,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 1129 [2023-01-27 18:30:17,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:31:21,009 INFO L130 PetriNetUnfolder]: 601191/787414 cut-off events. [2023-01-27 18:31:21,009 INFO L131 PetriNetUnfolder]: For 472891/472891 co-relation queries the response was YES. [2023-01-27 18:31:22,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020659 conditions, 787414 events. 601191/787414 cut-off events. For 472891/472891 co-relation queries the response was YES. Maximal size of possible extension queue 10048. Compared 5235219 event pairs, 425486 based on Foata normal form. 5650/690614 useless extension candidates. Maximal degree in co-relation 2020647. Up to 763154 conditions per place. [2023-01-27 18:31:25,601 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 239 selfloop transitions, 2 changer transitions 2/245 dead transitions. [2023-01-27 18:31:25,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 245 transitions, 1484 flow [2023-01-27 18:31:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:31:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:31:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1752 transitions. [2023-01-27 18:31:25,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172719220549159 [2023-01-27 18:31:25,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1752 transitions. [2023-01-27 18:31:25,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1752 transitions. [2023-01-27 18:31:25,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:31:25,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1752 transitions. [2023-01-27 18:31:25,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 584.0) internal successors, (1752), 3 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:31:25,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:31:25,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:31:25,610 INFO L175 Difference]: Start difference. First operand has 107 places, 159 transitions, 672 flow. Second operand 3 states and 1752 transitions. [2023-01-27 18:31:25,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 245 transitions, 1484 flow [2023-01-27 18:31:48,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 245 transitions, 1408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:31:48,260 INFO L231 Difference]: Finished difference. Result has 108 places, 160 transitions, 630 flow [2023-01-27 18:31:48,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=108, PETRI_TRANSITIONS=160} [2023-01-27 18:31:48,261 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 16 predicate places. [2023-01-27 18:31:48,261 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 160 transitions, 630 flow [2023-01-27 18:31:48,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:31:48,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:31:48,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:31:48,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-27 18:31:48,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 18:31:48,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:31:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash -505569051, now seen corresponding path program 1 times [2023-01-27 18:31:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:31:48,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108875211] [2023-01-27 18:31:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:31:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:31:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:31:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-01-27 18:31:48,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:31:48,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108875211] [2023-01-27 18:31:48,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108875211] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:31:48,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:31:48,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 18:31:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194203460] [2023-01-27 18:31:48,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:31:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:31:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:31:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:31:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:31:48,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 523 out of 1129 [2023-01-27 18:31:48,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 160 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 527.6666666666666) internal successors, (1583), 3 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:31:48,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:31:48,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 523 of 1129 [2023-01-27 18:31:48,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand