/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-ext/26_stack_cas_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:55:33,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:55:33,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:55:34,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-27 17:55:34,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:55:34,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:55:34,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:55:34,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:55:34,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:55:34,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:55:34,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:55:34,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:55:34,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:55:34,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:55:34,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:55:34,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:55:34,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:55:34,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:55:34,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:55:34,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:55:34,098 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 17:55:34,123 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:55:34,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:55:34,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:55:34,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:55:34,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:55:34,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:55:34,125 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:55:34,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:55:34,126 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:55:34,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:55:34,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:55:34,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:55:34,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:55:34,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:55:34,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:55:34,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:55:34,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:55:34,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:55:34,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:55:34,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:55:34,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:55:34,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:55:34,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:55:34,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:55:34,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:55:34,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:55:34,463 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:55:34,464 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:55:34,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-01-27 17:55:36,151 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:55:36,405 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:55:36,406 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-01-27 17:55:36,430 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92027083a/7ef1e45e2df54219936cdb39dfefb3b3/FLAG4c3fb57b6 [2023-01-27 17:55:36,452 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92027083a/7ef1e45e2df54219936cdb39dfefb3b3 [2023-01-27 17:55:36,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:55:36,454 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:55:36,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:55:36,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:55:36,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:55:36,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:36,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108165ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36, skipping insertion in model container [2023-01-27 17:55:36,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:36,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:55:36,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:55:36,821 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-ext/26_stack_cas_longest-2.i[31164,31177] [2023-01-27 17:55:36,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:55:36,851 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:55:36,945 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-ext/26_stack_cas_longest-2.i[31164,31177] [2023-01-27 17:55:36,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:55:36,988 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:55:36,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36 WrapperNode [2023-01-27 17:55:36,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:55:36,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:55:36,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:55:36,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:55:36,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,062 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-01-27 17:55:37,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:55:37,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:55:37,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:55:37,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:55:37,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,101 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:55:37,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:55:37,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:55:37,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:55:37,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (1/1) ... [2023-01-27 17:55:37,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:55:37,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:55:37,155 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 17:55:37,188 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 17:55:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:55:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:55:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:55:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:55:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:55:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:55:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:55:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:55:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:55:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:55:37,224 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 17:55:37,453 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:55:37,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:55:37,933 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:55:38,070 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:55:38,070 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 17:55:38,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:55:38 BoogieIcfgContainer [2023-01-27 17:55:38,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:55:38,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:55:38,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:55:38,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:55:38,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:55:36" (1/3) ... [2023-01-27 17:55:38,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79391909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:55:38, skipping insertion in model container [2023-01-27 17:55:38,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:55:36" (2/3) ... [2023-01-27 17:55:38,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79391909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:55:38, skipping insertion in model container [2023-01-27 17:55:38,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:55:38" (3/3) ... [2023-01-27 17:55:38,081 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-01-27 17:55:38,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:55:38,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:55:38,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:55:38,207 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:55:38,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-27 17:55:38,424 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-27 17:55:38,424 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:55:38,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-01-27 17:55:38,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-01-27 17:55:38,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-01-27 17:55:38,435 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:55:38,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-27 17:55:38,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-27 17:55:38,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-27 17:55:38,507 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-27 17:55:38,507 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:55:38,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-01-27 17:55:38,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-01-27 17:55:44,912 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-01-27 17:55:44,912 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-01-27 17:55:44,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:55:44,939 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;@3a43186b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:55:44,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:55:44,948 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 17:55:44,949 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:55:44,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:55:44,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:55:44,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:55:44,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:55:44,954 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-01-27 17:55:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:55:44,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340697816] [2023-01-27 17:55:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:55:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:55:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:55:45,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:55:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:55:45,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:55:45,181 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:55:45,181 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:55:45,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:55:45,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:55:45,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:55:45,183 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-27 17:55:45,185 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:55:45,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:55:45,300 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:55:45,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-01-27 17:55:45,337 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-01-27 17:55:45,337 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:55:45,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-01-27 17:55:45,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-01-27 17:55:45,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-01-27 17:55:45,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:55:45,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-01-27 17:55:45,341 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-01-27 17:55:45,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-01-27 17:55:45,374 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-01-27 17:55:45,375 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:55:45,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-01-27 17:55:45,384 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-01-27 17:55:53,266 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-01-27 17:55:53,266 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-01-27 17:55:53,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:55:53,268 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;@3a43186b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:55:53,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:55:53,271 INFO L130 PetriNetUnfolder]: 4/34 cut-off events. [2023-01-27 17:55:53,271 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:55:53,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:55:53,271 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:55:53,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:55:53,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:55:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-01-27 17:55:53,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:55:53,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256142333] [2023-01-27 17:55:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:55:53,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:55:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:55:53,325 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:55:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:55:53,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:55:53,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:55:53,346 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:55:53,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:55:53,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:55:53,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:55:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:55:53,346 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-27 17:55:53,347 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:55:53,347 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:55:53,420 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:55:53,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-01-27 17:55:53,474 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-01-27 17:55:53,475 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:55:53,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-01-27 17:55:53,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-01-27 17:55:53,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-01-27 17:55:53,481 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:55:53,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-01-27 17:55:53,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-01-27 17:55:53,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-01-27 17:55:53,537 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-01-27 17:55:53,537 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:55:53,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-01-27 17:55:53,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-01-27 17:56:04,801 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-01-27 17:56:04,809 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-01-27 17:56:04,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:04,811 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;@3a43186b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:04,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:56:04,815 INFO L130 PetriNetUnfolder]: 7/57 cut-off events. [2023-01-27 17:56:04,815 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:56:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:04,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:04,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:56:04,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1544388608, now seen corresponding path program 1 times [2023-01-27 17:56:04,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:04,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659604502] [2023-01-27 17:56:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:04,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:05,052 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 17:56:05,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659604502] [2023-01-27 17:56:05,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659604502] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:05,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:05,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:56:05,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684135251] [2023-01-27 17:56:05,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:56:05,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:56:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:56:05,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 490 [2023-01-27 17:56:05,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 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 17:56:05,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:05,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 490 [2023-01-27 17:56:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:14,217 INFO L130 PetriNetUnfolder]: 53543/75895 cut-off events. [2023-01-27 17:56:14,218 INFO L131 PetriNetUnfolder]: For 2734/2734 co-relation queries the response was YES. [2023-01-27 17:56:14,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148813 conditions, 75895 events. 53543/75895 cut-off events. For 2734/2734 co-relation queries the response was YES. Maximal size of possible extension queue 2088. Compared 540833 event pairs, 4345 based on Foata normal form. 0/61788 useless extension candidates. Maximal degree in co-relation 92118. Up to 49070 conditions per place. [2023-01-27 17:56:15,205 INFO L137 encePairwiseOnDemand]: 474/490 looper letters, 209 selfloop transitions, 9 changer transitions 0/234 dead transitions. [2023-01-27 17:56:15,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 234 transitions, 956 flow [2023-01-27 17:56:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 17:56:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 17:56:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1323 transitions. [2023-01-27 17:56:15,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2023-01-27 17:56:15,240 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1323 transitions. [2023-01-27 17:56:15,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1323 transitions. [2023-01-27 17:56:15,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:15,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1323 transitions. [2023-01-27 17:56:15,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.6) internal successors, (1323), 5 states have internal predecessors, (1323), 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 17:56:15,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 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 17:56:15,262 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 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 17:56:15,263 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 213 flow. Second operand 5 states and 1323 transitions. [2023-01-27 17:56:15,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 234 transitions, 956 flow [2023-01-27 17:56:15,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 234 transitions, 944 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:15,275 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 267 flow [2023-01-27 17:56:15,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2023-01-27 17:56:15,281 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2023-01-27 17:56:15,281 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 267 flow [2023-01-27 17:56:15,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 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 17:56:15,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:15,283 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 17:56:15,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:56:15,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:56:15,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-01-27 17:56:15,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:15,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727743080] [2023-01-27 17:56:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:15,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:15,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:15,343 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:15,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:56:15,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:56:15,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 17:56:15,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:56:15,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:56:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:56:15,344 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:15,344 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:15,344 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:56:15,440 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:15,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-01-27 17:56:15,539 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-01-27 17:56:15,540 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:56:15,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-01-27 17:56:15,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-01-27 17:56:15,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-01-27 17:56:15,551 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:15,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-01-27 17:56:15,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-01-27 17:56:15,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-01-27 17:56:15,598 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-01-27 17:56:15,599 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:56:15,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-01-27 17:56:15,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-01-27 17:56:32,243 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-01-27 17:56:32,243 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-01-27 17:56:32,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:32,246 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;@3a43186b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:32,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:56:32,249 INFO L130 PetriNetUnfolder]: 8/56 cut-off events. [2023-01-27 17:56:32,249 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 17:56:32,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:32,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:32,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:56:32,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1068344059, now seen corresponding path program 1 times [2023-01-27 17:56:32,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:32,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428903222] [2023-01-27 17:56:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:32,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:32,355 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 17:56:32,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:32,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428903222] [2023-01-27 17:56:32,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428903222] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:32,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:32,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:56:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940773174] [2023-01-27 17:56:32,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:56:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:56:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:56:32,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-01-27 17:56:32,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 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 17:56:32,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:32,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-01-27 17:56:32,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:00:47,671 INFO L130 PetriNetUnfolder]: 1403237/1846935 cut-off events. [2023-01-27 18:00:47,716 INFO L131 PetriNetUnfolder]: For 82382/82382 co-relation queries the response was YES. [2023-01-27 18:00:56,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624844 conditions, 1846935 events. 1403237/1846935 cut-off events. For 82382/82382 co-relation queries the response was YES. Maximal size of possible extension queue 34452. Compared 14644321 event pairs, 194809 based on Foata normal form. 16330/1510322 useless extension candidates. Maximal degree in co-relation 893474. Up to 1175610 conditions per place. [2023-01-27 18:01:19,298 INFO L137 encePairwiseOnDemand]: 611/633 looper letters, 318 selfloop transitions, 17 changer transitions 0/357 dead transitions. [2023-01-27 18:01:19,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 357 transitions, 1474 flow [2023-01-27 18:01:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 18:01:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 18:01:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1768 transitions. [2023-01-27 18:01:19,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5586097946287519 [2023-01-27 18:01:19,340 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1768 transitions. [2023-01-27 18:01:19,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1768 transitions. [2023-01-27 18:01:19,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:01:19,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1768 transitions. [2023-01-27 18:01:19,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 353.6) internal successors, (1768), 5 states have internal predecessors, (1768), 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 18:01:19,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 633.0) internal successors, (3798), 6 states have internal predecessors, (3798), 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 18:01:19,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 633.0) internal successors, (3798), 6 states have internal predecessors, (3798), 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 18:01:19,374 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 288 flow. Second operand 5 states and 1768 transitions. [2023-01-27 18:01:19,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 357 transitions, 1474 flow [2023-01-27 18:01:19,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 357 transitions, 1444 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-01-27 18:01:19,859 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 396 flow [2023-01-27 18:01:19,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2023-01-27 18:01:19,860 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 7 predicate places. [2023-01-27 18:01:19,861 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 396 flow [2023-01-27 18:01:19,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 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 18:01:19,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:01:19,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:01:19,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 18:01:19,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 18:01:19,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:01:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1687160668, now seen corresponding path program 1 times [2023-01-27 18:01:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:01:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276188322] [2023-01-27 18:01:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:01:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:01:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:01:20,183 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 18:01:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:01:20,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276188322] [2023-01-27 18:01:20,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276188322] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:01:20,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:01:20,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:01:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80066049] [2023-01-27 18:01:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:01:20,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:01:20,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:01:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:01:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:01:20,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 633 [2023-01-27 18:01:20,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 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 18:01:20,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:01:20,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 633 [2023-01-27 18:01:20,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand