/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:53:12,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:53:12,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:53:12,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-27 17:53:12,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:53:12,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:53:12,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:53:12,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:53:12,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:53:12,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:53:12,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:53:12,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:53:12,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:53:12,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:53:12,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:53:12,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:53:12,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:53:12,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:53:12,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:53:12,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:53:12,950 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 17:53:12,981 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:53:12,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:53:12,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:53:12,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:53:12,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:53:12,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:53:12,983 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:53:12,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:53:12,984 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:53:12,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:53:12,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:53:12,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:53:12,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:53:12,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:53:12,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:53:12,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:53:13,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:53:13,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:53:13,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:53:13,345 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:53:13,346 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:53:13,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-01-27 17:53:14,955 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:53:15,342 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:53:15,342 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-01-27 17:53:15,353 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/027695134/ab68ca2cac2a4432b159471cdbdff5aa/FLAG2ff51dd84 [2023-01-27 17:53:15,559 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/027695134/ab68ca2cac2a4432b159471cdbdff5aa [2023-01-27 17:53:15,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:53:15,561 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:53:15,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:53:15,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:53:15,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:53:15,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:53:15" (1/1) ... [2023-01-27 17:53:15,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f52cb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:15, skipping insertion in model container [2023-01-27 17:53:15,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:53:15" (1/1) ... [2023-01-27 17:53:15,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:53:15,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:53:16,107 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_longer-2.i[31163,31176] [2023-01-27 17:53:16,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:53:16,143 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:53:16,230 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_longer-2.i[31163,31176] [2023-01-27 17:53:16,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:53:16,273 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:53:16,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16 WrapperNode [2023-01-27 17:53:16,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:53:16,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:53:16,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:53:16,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:53:16,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,349 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-01-27 17:53:16,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:53:16,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:53:16,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:53:16,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:53:16,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,394 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:53:16,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:53:16,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:53:16,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:53:16,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (1/1) ... [2023-01-27 17:53:16,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:53:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:53:16,481 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 17:53:16,485 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 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:53:16,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:53:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:53:16,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:53:16,526 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 17:53:16,745 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:53:16,750 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:53:17,275 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:53:17,554 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:53:17,554 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 17:53:17,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:53:17 BoogieIcfgContainer [2023-01-27 17:53:17,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:53:17,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:53:17,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:53:17,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:53:17,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:53:15" (1/3) ... [2023-01-27 17:53:17,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619c8fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:53:17, skipping insertion in model container [2023-01-27 17:53:17,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:53:16" (2/3) ... [2023-01-27 17:53:17,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619c8fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:53:17, skipping insertion in model container [2023-01-27 17:53:17,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:53:17" (3/3) ... [2023-01-27 17:53:17,575 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2023-01-27 17:53:17,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:53:17,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:53:17,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:53:17,696 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:53:17,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-27 17:53:17,797 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-27 17:53:17,797 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:53:17,802 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 17:53:17,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-01-27 17:53:17,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-01-27 17:53:17,828 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:53:17,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-27 17:53:17,835 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-27 17:53:17,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-27 17:53:17,877 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-27 17:53:17,877 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:53:17,878 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 17:53:17,879 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-01-27 17:53:21,730 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-01-27 17:53:21,731 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-01-27 17:53:21,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:53:21,748 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;@7a028187, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:53:21,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:53:21,755 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 17:53:21,756 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:53:21,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:53:21,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:53:21,757 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 17:53:21,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:53:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-01-27 17:53:21,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:53:21,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312005915] [2023-01-27 17:53:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:53:21,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:53:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:53:21,931 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:53:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:53:22,011 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:53:22,012 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:53:22,013 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:53:22,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:53:22,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:53:22,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:53:22,025 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-27 17:53:22,031 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:53:22,031 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:53:22,117 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:53:22,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-01-27 17:53:22,177 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-01-27 17:53:22,177 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:53:22,181 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 17:53:22,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-01-27 17:53:22,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-01-27 17:53:22,183 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:53:22,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-01-27 17:53:22,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-01-27 17:53:22,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-01-27 17:53:22,207 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-01-27 17:53:22,208 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:53:22,209 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 17:53:22,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-01-27 17:53:26,753 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-01-27 17:53:26,753 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-01-27 17:53:26,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:53:26,755 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;@7a028187, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:53:26,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:53:26,758 INFO L130 PetriNetUnfolder]: 4/34 cut-off events. [2023-01-27 17:53:26,758 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:53:26,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:53:26,758 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:53:26,759 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 17:53:26,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:53:26,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-01-27 17:53:26,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:53:26,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058852981] [2023-01-27 17:53:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:53:26,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:53:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:53:26,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:53:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:53:26,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:53:26,851 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:53:26,852 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:53:26,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:53:26,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:53:26,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:53:26,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:53:26,852 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-27 17:53:26,853 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:53:26,853 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:53:26,976 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:53:26,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-01-27 17:53:27,046 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-01-27 17:53:27,046 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:53:27,050 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 17:53:27,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-01-27 17:53:27,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-01-27 17:53:27,066 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:53:27,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-01-27 17:53:27,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-01-27 17:53:27,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-01-27 17:53:27,118 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-01-27 17:53:27,118 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:53:27,136 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 17:53:27,166 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-01-27 17:53:33,859 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-01-27 17:53:33,859 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-01-27 17:53:33,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:53:33,862 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;@7a028187, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:53:33,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:53:33,866 INFO L130 PetriNetUnfolder]: 7/57 cut-off events. [2023-01-27 17:53:33,866 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:53:33,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:53:33,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:53:33,866 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 17:53:33,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:53:33,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1544388608, now seen corresponding path program 1 times [2023-01-27 17:53:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:53:33,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690438835] [2023-01-27 17:53:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:53:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:53:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:53:34,040 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 17:53:34,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:53:34,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690438835] [2023-01-27 17:53:34,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690438835] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:53:34,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:53:34,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:53:34,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417337550] [2023-01-27 17:53:34,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:53:34,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:53:34,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:53:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:53:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:53:34,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 490 [2023-01-27 17:53:34,080 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 17:53:34,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:53:34,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 490 [2023-01-27 17:53:34,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:53:42,862 INFO L130 PetriNetUnfolder]: 53543/75895 cut-off events. [2023-01-27 17:53:42,862 INFO L131 PetriNetUnfolder]: For 2734/2734 co-relation queries the response was YES. [2023-01-27 17:53:43,084 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 17:53:43,971 INFO L137 encePairwiseOnDemand]: 474/490 looper letters, 209 selfloop transitions, 9 changer transitions 0/234 dead transitions. [2023-01-27 17:53:43,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 234 transitions, 956 flow [2023-01-27 17:53:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 17:53:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 17:53:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1323 transitions. [2023-01-27 17:53:44,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2023-01-27 17:53:44,006 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1323 transitions. [2023-01-27 17:53:44,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1323 transitions. [2023-01-27 17:53:44,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:53:44,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1323 transitions. [2023-01-27 17:53:44,017 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 17:53:44,048 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 17:53:44,073 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 17:53:44,075 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 213 flow. Second operand 5 states and 1323 transitions. [2023-01-27 17:53:44,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 234 transitions, 956 flow [2023-01-27 17:53:44,119 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 17:53:44,133 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 267 flow [2023-01-27 17:53:44,134 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 17:53:44,137 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2023-01-27 17:53:44,137 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 267 flow [2023-01-27 17:53:44,137 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 17:53:44,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:53:44,139 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 17:53:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:53:44,139 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 17:53:44,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:53:44,139 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-01-27 17:53:44,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:53:44,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571751882] [2023-01-27 17:53:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:53:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:53:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:53:44,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:53:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:53:44,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:53:44,223 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:53:44,223 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:53:44,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:53:44,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 17:53:44,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:53:44,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:53:44,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:53:44,224 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:53:44,225 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:53:44,225 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:53:44,309 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:53:44,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-01-27 17:53:44,437 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-01-27 17:53:44,438 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:53:44,454 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 17:53:44,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-01-27 17:53:44,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-01-27 17:53:44,473 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:53:44,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-01-27 17:53:44,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-01-27 17:53:44,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-01-27 17:53:44,583 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-01-27 17:53:44,583 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:53:44,589 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 17:53:44,621 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-01-27 17:53:52,000 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-01-27 17:53:52,000 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-01-27 17:53:52,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:53:52,002 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;@7a028187, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:53:52,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:53:52,006 INFO L130 PetriNetUnfolder]: 8/56 cut-off events. [2023-01-27 17:53:52,006 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 17:53:52,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:53:52,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:53:52,007 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 17:53:52,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:53:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1068344059, now seen corresponding path program 1 times [2023-01-27 17:53:52,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:53:52,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573838903] [2023-01-27 17:53:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:53:52,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:53:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:53:52,175 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 17:53:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:53:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573838903] [2023-01-27 17:53:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573838903] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:53:52,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:53:52,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:53:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666796610] [2023-01-27 17:53:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:53:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:53:52,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:53:52,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:53:52,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:53:52,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-01-27 17:53:52,181 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 17:53:52,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:53:52,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-01-27 17:53:52,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:30,160 INFO L130 PetriNetUnfolder]: 1403237/1846935 cut-off events. [2023-01-27 17:57:30,168 INFO L131 PetriNetUnfolder]: For 82382/82382 co-relation queries the response was YES. [2023-01-27 17:57:36,320 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 17:57:56,025 INFO L137 encePairwiseOnDemand]: 611/633 looper letters, 318 selfloop transitions, 17 changer transitions 0/357 dead transitions. [2023-01-27 17:57:56,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 357 transitions, 1474 flow [2023-01-27 17:57:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 17:57:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 17:57:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1768 transitions. [2023-01-27 17:57:56,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5586097946287519 [2023-01-27 17:57:56,036 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1768 transitions. [2023-01-27 17:57:56,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1768 transitions. [2023-01-27 17:57:56,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:56,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1768 transitions. [2023-01-27 17:57:56,053 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 17:57:56,058 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 17:57:56,059 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 17:57:56,059 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 288 flow. Second operand 5 states and 1768 transitions. [2023-01-27 17:57:56,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 357 transitions, 1474 flow [2023-01-27 17:57:56,491 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 17:57:56,509 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 396 flow [2023-01-27 17:57:56,509 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 17:57:56,510 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 7 predicate places. [2023-01-27 17:57:56,511 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 396 flow [2023-01-27 17:57:56,511 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 17:57:56,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:56,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:56,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:57:56,512 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 17:57:56,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1687160668, now seen corresponding path program 1 times [2023-01-27 17:57:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:56,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822614083] [2023-01-27 17:57:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:56,632 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 17:57:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:56,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822614083] [2023-01-27 17:57:56,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822614083] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:56,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:56,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:57:56,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820370230] [2023-01-27 17:57:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:57:56,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:56,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:57:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:57:56,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 633 [2023-01-27 17:57:56,646 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 17:57:56,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:56,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 633 [2023-01-27 17:57:56,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand