/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -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 [2023-01-28 06:33:38,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:33:38,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:33:38,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:33:38,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:33:38,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:33:38,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:33:38,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:33:38,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:33:38,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:33:38,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:33:38,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:33:38,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:33:38,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:33:38,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:33:38,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:33:38,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:33:38,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:33:38,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:33:38,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:33:38,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:33:38,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:33:38,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:33:38,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:33:38,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 06:33:38,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 06:33:38,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 06:33:38,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 06:33:38,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 06:33:38,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 06:33:38,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 06:33:38,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 06:33:38,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 06:33:38,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:33:38,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:33:38,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:33:38,570 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 [2023-01-28 06:33:38,591 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:33:38,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:33:38,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:33:38,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:33:38,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:33:38,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:33:38,594 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:33:38,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:33:38,594 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:33:38,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:33:38,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:33:38,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:33:38,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:33:38,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:33:38,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:33:38,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:33:38,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:33:38,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:33:38,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:33:38,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:33:38,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:33:38,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:33:38,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:33:38,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:33:38,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:33:38,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:33:38,802 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:33:38,802 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:33:38,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-01-28 06:33:39,829 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:33:40,029 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:33:40,029 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-01-28 06:33:40,046 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858b88421/6ffc73026efb411395837ade2f70afd2/FLAGc2d6ff824 [2023-01-28 06:33:40,056 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858b88421/6ffc73026efb411395837ade2f70afd2 [2023-01-28 06:33:40,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:33:40,059 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:33:40,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:33:40,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:33:40,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:33:40,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374f8dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40, skipping insertion in model container [2023-01-28 06:33:40,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:33:40,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:33:40,357 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] [2023-01-28 06:33:40,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:33:40,374 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:33:40,420 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] [2023-01-28 06:33:40,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:33:40,453 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:33:40,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40 WrapperNode [2023-01-28 06:33:40,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:33:40,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:33:40,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:33:40,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:33:40,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,481 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-01-28 06:33:40,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:33:40,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:33:40,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:33:40,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:33:40,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,497 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:33:40,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:33:40,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:33:40,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:33:40,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (1/1) ... [2023-01-28 06:33:40,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:33:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:33:40,521 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) [2023-01-28 06:33:40,526 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 [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-28 06:33:40,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:33:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:33:40,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:33:40,552 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 06:33:40,698 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:33:40,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:33:40,960 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:33:41,072 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:33:41,073 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 06:33:41,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:33:41 BoogieIcfgContainer [2023-01-28 06:33:41,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:33:41,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:33:41,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:33:41,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:33:41,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:33:40" (1/3) ... [2023-01-28 06:33:41,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1383d0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:33:41, skipping insertion in model container [2023-01-28 06:33:41,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:33:40" (2/3) ... [2023-01-28 06:33:41,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1383d0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:33:41, skipping insertion in model container [2023-01-28 06:33:41,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:33:41" (3/3) ... [2023-01-28 06:33:41,080 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-01-28 06:33:41,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:33:41,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 06:33:41,093 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:33:41,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:33:41,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-28 06:33:41,214 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-28 06:33:41,214 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:33:41,218 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. [2023-01-28 06:33:41,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-01-28 06:33:41,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-01-28 06:33:41,223 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:33:41,228 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-28 06:33:41,230 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-28 06:33:41,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-28 06:33:41,248 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-28 06:33:41,249 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:33:41,249 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. [2023-01-28 06:33:41,251 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-01-28 06:33:44,271 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-01-28 06:33:44,272 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-01-28 06:33:44,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:33:44,293 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;@a72ce9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:33:44,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 06:33:44,304 INFO L130 PetriNetUnfolder]: 5/24 cut-off events. [2023-01-28 06:33:44,304 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:33:44,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:44,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:44,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:44,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1286972708, now seen corresponding path program 1 times [2023-01-28 06:33:44,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:44,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990227409] [2023-01-28 06:33:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:44,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990227409] [2023-01-28 06:33:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990227409] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:33:44,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:33:44,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:33:44,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585229230] [2023-01-28 06:33:44,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:33:44,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:33:44,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:33:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:33:44,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 218 [2023-01-28 06:33:44,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2023-01-28 06:33:44,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:44,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 218 [2023-01-28 06:33:44,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:33:44,606 INFO L130 PetriNetUnfolder]: 42/93 cut-off events. [2023-01-28 06:33:44,606 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:33:44,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 93 events. 42/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 2 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 178. Up to 83 conditions per place. [2023-01-28 06:33:44,609 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 22 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-01-28 06:33:44,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 26 transitions, 107 flow [2023-01-28 06:33:44,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:33:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:33:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-01-28 06:33:44,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481651376146789 [2023-01-28 06:33:44,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-01-28 06:33:44,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-01-28 06:33:44,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:33:44,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-01-28 06:33:44,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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) [2023-01-28 06:33:44,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-01-28 06:33:44,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-01-28 06:33:44,636 INFO L175 Difference]: Start difference. First operand has 24 places, 28 transitions, 61 flow. Second operand 3 states and 315 transitions. [2023-01-28 06:33:44,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 26 transitions, 107 flow [2023-01-28 06:33:44,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:33:44,640 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 55 flow [2023-01-28 06:33:44,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-01-28 06:33:44,643 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-01-28 06:33:44,644 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 55 flow [2023-01-28 06:33:44,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2023-01-28 06:33:44,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:44,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:44,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:33:44,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:44,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -342307077, now seen corresponding path program 1 times [2023-01-28 06:33:44,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:44,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385777525] [2023-01-28 06:33:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:44,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:44,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:44,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385777525] [2023-01-28 06:33:44,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385777525] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:33:44,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:33:44,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:33:44,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729638763] [2023-01-28 06:33:44,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:33:44,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:33:44,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:44,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:33:44,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:33:44,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 218 [2023-01-28 06:33:44,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2023-01-28 06:33:44,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:44,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 218 [2023-01-28 06:33:44,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:33:44,838 INFO L130 PetriNetUnfolder]: 50/113 cut-off events. [2023-01-28 06:33:44,839 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:33:44,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 113 events. 50/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 14 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 221. Up to 73 conditions per place. [2023-01-28 06:33:44,842 INFO L137 encePairwiseOnDemand]: 215/218 looper letters, 26 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-01-28 06:33:44,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 127 flow [2023-01-28 06:33:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:33:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:33:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-01-28 06:33:44,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47706422018348627 [2023-01-28 06:33:44,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-01-28 06:33:44,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-01-28 06:33:44,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:33:44,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-01-28 06:33:44,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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) [2023-01-28 06:33:44,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-01-28 06:33:44,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-01-28 06:33:44,848 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 55 flow. Second operand 3 states and 312 transitions. [2023-01-28 06:33:44,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 127 flow [2023-01-28 06:33:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:33:44,849 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 63 flow [2023-01-28 06:33:44,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-01-28 06:33:44,850 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-01-28 06:33:44,850 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 63 flow [2023-01-28 06:33:44,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2023-01-28 06:33:44,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:44,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:44,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:33:44,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:44,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash -339227072, now seen corresponding path program 1 times [2023-01-28 06:33:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:44,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612023993] [2023-01-28 06:33:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:44,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612023993] [2023-01-28 06:33:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612023993] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:33:44,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:33:44,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:33:44,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081966194] [2023-01-28 06:33:44,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:33:44,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:33:44,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:33:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:33:44,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 218 [2023-01-28 06:33:44,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 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) [2023-01-28 06:33:44,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:44,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 218 [2023-01-28 06:33:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:33:45,084 INFO L130 PetriNetUnfolder]: 71/161 cut-off events. [2023-01-28 06:33:45,085 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:33:45,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 161 events. 71/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 12 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 326. Up to 73 conditions per place. [2023-01-28 06:33:45,087 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 39 selfloop transitions, 5 changer transitions 1/46 dead transitions. [2023-01-28 06:33:45,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 46 transitions, 197 flow [2023-01-28 06:33:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:33:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:33:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 556 transitions. [2023-01-28 06:33:45,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42507645259938837 [2023-01-28 06:33:45,088 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 556 transitions. [2023-01-28 06:33:45,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 556 transitions. [2023-01-28 06:33:45,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:33:45,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 556 transitions. [2023-01-28 06:33:45,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.66666666666667) internal successors, (556), 6 states have internal predecessors, (556), 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) [2023-01-28 06:33:45,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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) [2023-01-28 06:33:45,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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) [2023-01-28 06:33:45,092 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 63 flow. Second operand 6 states and 556 transitions. [2023-01-28 06:33:45,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 46 transitions, 197 flow [2023-01-28 06:33:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:33:45,093 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 91 flow [2023-01-28 06:33:45,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-01-28 06:33:45,094 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2023-01-28 06:33:45,094 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 91 flow [2023-01-28 06:33:45,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 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) [2023-01-28 06:33:45,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:45,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:45,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:33:45,095 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:45,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash 85896053, now seen corresponding path program 1 times [2023-01-28 06:33:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:45,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085317720] [2023-01-28 06:33:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:45,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:45,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085317720] [2023-01-28 06:33:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085317720] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:33:45,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:33:45,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 06:33:45,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676436657] [2023-01-28 06:33:45,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:33:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:33:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:33:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:33:45,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 218 [2023-01-28 06:33:45,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 53.6) internal successors, (536), 10 states have internal predecessors, (536), 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) [2023-01-28 06:33:45,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:45,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 218 [2023-01-28 06:33:45,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:33:45,806 INFO L130 PetriNetUnfolder]: 110/258 cut-off events. [2023-01-28 06:33:45,807 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 06:33:45,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 258 events. 110/258 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 760 event pairs, 6 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 561. Up to 88 conditions per place. [2023-01-28 06:33:45,808 INFO L137 encePairwiseOnDemand]: 206/218 looper letters, 47 selfloop transitions, 20 changer transitions 1/69 dead transitions. [2023-01-28 06:33:45,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 328 flow [2023-01-28 06:33:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 06:33:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 06:33:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2023-01-28 06:33:45,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26605504587155965 [2023-01-28 06:33:45,810 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2023-01-28 06:33:45,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2023-01-28 06:33:45,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:33:45,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2023-01-28 06:33:45,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 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) [2023-01-28 06:33:45,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 218.0) internal successors, (2616), 12 states have internal predecessors, (2616), 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) [2023-01-28 06:33:45,815 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 218.0) internal successors, (2616), 12 states have internal predecessors, (2616), 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) [2023-01-28 06:33:45,816 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 91 flow. Second operand 11 states and 638 transitions. [2023-01-28 06:33:45,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 328 flow [2023-01-28 06:33:45,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:33:45,820 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 214 flow [2023-01-28 06:33:45,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=214, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-01-28 06:33:45,824 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2023-01-28 06:33:45,825 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 214 flow [2023-01-28 06:33:45,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.6) internal successors, (536), 10 states have internal predecessors, (536), 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) [2023-01-28 06:33:45,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:45,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:45,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:33:45,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:45,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash -740293209, now seen corresponding path program 1 times [2023-01-28 06:33:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:45,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083792015] [2023-01-28 06:33:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:46,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:46,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083792015] [2023-01-28 06:33:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083792015] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:33:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022973365] [2023-01-28 06:33:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:46,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:33:46,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:33:46,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:33:46,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 06:33:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 06:33:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:33:46,479 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 06:33:46,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 06:33:46,717 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-01-28 06:33:46,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-01-28 06:33:46,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 06:33:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:46,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:33:46,980 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-01-28 06:33:46,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 38 [2023-01-28 06:33:46,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:33:46,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-01-28 06:33:46,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-01-28 06:33:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:47,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022973365] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:33:47,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:33:47,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-01-28 06:33:47,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158908062] [2023-01-28 06:33:47,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:33:47,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 06:33:47,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:47,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 06:33:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=468, Unknown=11, NotChecked=0, Total=552 [2023-01-28 06:33:47,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 218 [2023-01-28 06:33:47,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 214 flow. Second operand has 24 states, 24 states have (on average 52.166666666666664) internal successors, (1252), 24 states have internal predecessors, (1252), 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) [2023-01-28 06:33:47,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:47,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 218 [2023-01-28 06:33:47,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:33:50,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:33:52,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:33:54,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:33:56,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 06:33:56,707 INFO L130 PetriNetUnfolder]: 249/606 cut-off events. [2023-01-28 06:33:56,708 INFO L131 PetriNetUnfolder]: For 693/693 co-relation queries the response was YES. [2023-01-28 06:33:56,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 606 events. 249/606 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2132 event pairs, 14 based on Foata normal form. 10/578 useless extension candidates. Maximal degree in co-relation 1936. Up to 116 conditions per place. [2023-01-28 06:33:56,710 INFO L137 encePairwiseOnDemand]: 205/218 looper letters, 145 selfloop transitions, 80 changer transitions 1/227 dead transitions. [2023-01-28 06:33:56,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 227 transitions, 1530 flow [2023-01-28 06:33:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 06:33:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 06:33:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2159 transitions. [2023-01-28 06:33:56,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2539402493530934 [2023-01-28 06:33:56,716 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2159 transitions. [2023-01-28 06:33:56,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2159 transitions. [2023-01-28 06:33:56,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:33:56,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2159 transitions. [2023-01-28 06:33:56,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.35897435897436) internal successors, (2159), 39 states have internal predecessors, (2159), 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) [2023-01-28 06:33:56,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 218.0) internal successors, (8720), 40 states have internal predecessors, (8720), 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) [2023-01-28 06:33:56,730 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 218.0) internal successors, (8720), 40 states have internal predecessors, (8720), 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) [2023-01-28 06:33:56,730 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 214 flow. Second operand 39 states and 2159 transitions. [2023-01-28 06:33:56,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 227 transitions, 1530 flow [2023-01-28 06:33:56,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 227 transitions, 1504 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-28 06:33:56,739 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 881 flow [2023-01-28 06:33:56,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=881, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2023-01-28 06:33:56,741 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 71 predicate places. [2023-01-28 06:33:56,741 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 881 flow [2023-01-28 06:33:56,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.166666666666664) internal successors, (1252), 24 states have internal predecessors, (1252), 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) [2023-01-28 06:33:56,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:56,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:56,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 06:33:56,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:33:56,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:56,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash 891701287, now seen corresponding path program 1 times [2023-01-28 06:33:56,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:56,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877375414] [2023-01-28 06:33:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:56,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:57,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877375414] [2023-01-28 06:33:57,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877375414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:33:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761066166] [2023-01-28 06:33:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:57,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:33:57,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:33:57,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:33:57,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 06:33:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:57,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 06:33:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:33:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:57,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:33:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761066166] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:33:57,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:33:57,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 06:33:57,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41919541] [2023-01-28 06:33:57,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:33:57,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:33:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:57,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:33:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:33:57,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 218 [2023-01-28 06:33:57,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 881 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 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) [2023-01-28 06:33:57,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:57,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 218 [2023-01-28 06:33:57,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:33:57,393 INFO L130 PetriNetUnfolder]: 317/776 cut-off events. [2023-01-28 06:33:57,393 INFO L131 PetriNetUnfolder]: For 2732/2732 co-relation queries the response was YES. [2023-01-28 06:33:57,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 776 events. 317/776 cut-off events. For 2732/2732 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2683 event pairs, 20 based on Foata normal form. 14/754 useless extension candidates. Maximal degree in co-relation 3195. Up to 396 conditions per place. [2023-01-28 06:33:57,398 INFO L137 encePairwiseOnDemand]: 214/218 looper letters, 147 selfloop transitions, 17 changer transitions 4/169 dead transitions. [2023-01-28 06:33:57,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 169 transitions, 1578 flow [2023-01-28 06:33:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:33:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:33:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2023-01-28 06:33:57,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48853211009174313 [2023-01-28 06:33:57,400 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2023-01-28 06:33:57,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2023-01-28 06:33:57,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:33:57,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2023-01-28 06:33:57,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 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) [2023-01-28 06:33:57,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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) [2023-01-28 06:33:57,403 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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) [2023-01-28 06:33:57,403 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 881 flow. Second operand 6 states and 639 transitions. [2023-01-28 06:33:57,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 169 transitions, 1578 flow [2023-01-28 06:33:57,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 169 transitions, 1412 flow, removed 69 selfloop flow, removed 8 redundant places. [2023-01-28 06:33:57,412 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 847 flow [2023-01-28 06:33:57,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=847, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2023-01-28 06:33:57,414 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 71 predicate places. [2023-01-28 06:33:57,415 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 847 flow [2023-01-28 06:33:57,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 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) [2023-01-28 06:33:57,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:57,415 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:57,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 06:33:57,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 06:33:57,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:57,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1651390872, now seen corresponding path program 1 times [2023-01-28 06:33:57,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008178300] [2023-01-28 06:33:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-01-28 06:33:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:57,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008178300] [2023-01-28 06:33:57,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008178300] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:33:57,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:33:57,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:33:57,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493804003] [2023-01-28 06:33:57,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:33:57,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:33:57,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:57,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:33:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:33:57,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 218 [2023-01-28 06:33:57,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 847 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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) [2023-01-28 06:33:57,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:57,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 218 [2023-01-28 06:33:57,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:33:57,860 INFO L130 PetriNetUnfolder]: 403/970 cut-off events. [2023-01-28 06:33:57,861 INFO L131 PetriNetUnfolder]: For 3351/3351 co-relation queries the response was YES. [2023-01-28 06:33:57,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 970 events. 403/970 cut-off events. For 3351/3351 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3688 event pairs, 191 based on Foata normal form. 9/926 useless extension candidates. Maximal degree in co-relation 3854. Up to 688 conditions per place. [2023-01-28 06:33:57,866 INFO L137 encePairwiseOnDemand]: 215/218 looper letters, 155 selfloop transitions, 9 changer transitions 0/165 dead transitions. [2023-01-28 06:33:57,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 165 transitions, 1515 flow [2023-01-28 06:33:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:33:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:33:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-01-28 06:33:57,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-28 06:33:57,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-01-28 06:33:57,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-01-28 06:33:57,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:33:57,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-01-28 06:33:57,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2023-01-28 06:33:57,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-01-28 06:33:57,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-01-28 06:33:57,870 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 847 flow. Second operand 3 states and 327 transitions. [2023-01-28 06:33:57,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 165 transitions, 1515 flow [2023-01-28 06:33:57,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 165 transitions, 1502 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 06:33:57,884 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 949 flow [2023-01-28 06:33:57,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=949, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2023-01-28 06:33:57,884 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 73 predicate places. [2023-01-28 06:33:57,885 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 949 flow [2023-01-28 06:33:57,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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) [2023-01-28 06:33:57,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:33:57,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:33:57,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:33:57,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:33:57,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:33:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash -475112989, now seen corresponding path program 1 times [2023-01-28 06:33:57,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:33:57,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473154694] [2023-01-28 06:33:57,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:57,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:33:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 06:33:58,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:33:58,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473154694] [2023-01-28 06:33:58,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473154694] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:33:58,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672959663] [2023-01-28 06:33:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:33:58,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:33:58,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:33:58,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:33:58,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 06:33:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:33:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-28 06:33:58,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:33:58,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 06:33:58,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-01-28 06:33:58,897 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-28 06:33:58,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-01-28 06:33:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:58,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:33:59,007 INFO L321 Elim1Store]: treesize reduction 25, result has 50.0 percent of original size [2023-01-28 06:33:59,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 60 [2023-01-28 06:33:59,013 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:33:59,015 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2023-01-28 06:33:59,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2023-01-28 06:33:59,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:33:59,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-01-28 06:33:59,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-01-28 06:33:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:33:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672959663] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:33:59,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:33:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-01-28 06:33:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574612934] [2023-01-28 06:33:59,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:33:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 06:33:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:33:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 06:33:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-01-28 06:33:59,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 218 [2023-01-28 06:33:59,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 949 flow. Second operand has 24 states, 24 states have (on average 66.25) internal successors, (1590), 24 states have internal predecessors, (1590), 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) [2023-01-28 06:33:59,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:33:59,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 218 [2023-01-28 06:33:59,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:01,826 INFO L130 PetriNetUnfolder]: 638/1753 cut-off events. [2023-01-28 06:34:01,827 INFO L131 PetriNetUnfolder]: For 5495/5495 co-relation queries the response was YES. [2023-01-28 06:34:01,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 1753 events. 638/1753 cut-off events. For 5495/5495 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 8289 event pairs, 6 based on Foata normal form. 19/1679 useless extension candidates. Maximal degree in co-relation 6682. Up to 310 conditions per place. [2023-01-28 06:34:01,837 INFO L137 encePairwiseOnDemand]: 203/218 looper letters, 151 selfloop transitions, 98 changer transitions 266/516 dead transitions. [2023-01-28 06:34:01,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 516 transitions, 4612 flow [2023-01-28 06:34:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-28 06:34:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-28 06:34:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4413 transitions. [2023-01-28 06:34:01,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3067139282735613 [2023-01-28 06:34:01,847 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4413 transitions. [2023-01-28 06:34:01,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4413 transitions. [2023-01-28 06:34:01,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:01,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4413 transitions. [2023-01-28 06:34:01,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 66.86363636363636) internal successors, (4413), 66 states have internal predecessors, (4413), 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) [2023-01-28 06:34:01,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 218.0) internal successors, (14606), 67 states have internal predecessors, (14606), 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) [2023-01-28 06:34:01,872 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 218.0) internal successors, (14606), 67 states have internal predecessors, (14606), 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) [2023-01-28 06:34:01,872 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 949 flow. Second operand 66 states and 4413 transitions. [2023-01-28 06:34:01,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 516 transitions, 4612 flow [2023-01-28 06:34:01,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 516 transitions, 4574 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 06:34:01,894 INFO L231 Difference]: Finished difference. Result has 184 places, 154 transitions, 1546 flow [2023-01-28 06:34:01,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1546, PETRI_PLACES=184, PETRI_TRANSITIONS=154} [2023-01-28 06:34:01,895 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 160 predicate places. [2023-01-28 06:34:01,895 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 154 transitions, 1546 flow [2023-01-28 06:34:01,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.25) internal successors, (1590), 24 states have internal predecessors, (1590), 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) [2023-01-28 06:34:01,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:01,896 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:01,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 06:34:02,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:34:02,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:02,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:02,104 INFO L85 PathProgramCache]: Analyzing trace with hash 758691200, now seen corresponding path program 1 times [2023-01-28 06:34:02,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:02,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858731028] [2023-01-28 06:34:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:02,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:34:02,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:02,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858731028] [2023-01-28 06:34:02,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858731028] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:34:02,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502961844] [2023-01-28 06:34:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:02,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:34:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:34:02,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:34:02,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 06:34:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 06:34:02,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:34:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 240 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:34:02,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:34:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 240 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:34:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502961844] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:34:02,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:34:02,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-01-28 06:34:02,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736810711] [2023-01-28 06:34:02,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:34:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 06:34:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 06:34:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2023-01-28 06:34:02,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 218 [2023-01-28 06:34:02,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 154 transitions, 1546 flow. Second operand has 22 states, 22 states have (on average 92.63636363636364) internal successors, (2038), 22 states have internal predecessors, (2038), 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) [2023-01-28 06:34:02,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:02,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 218 [2023-01-28 06:34:02,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:03,594 INFO L130 PetriNetUnfolder]: 322/998 cut-off events. [2023-01-28 06:34:03,595 INFO L131 PetriNetUnfolder]: For 5306/5306 co-relation queries the response was YES. [2023-01-28 06:34:03,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5263 conditions, 998 events. 322/998 cut-off events. For 5306/5306 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4102 event pairs, 14 based on Foata normal form. 3/1001 useless extension candidates. Maximal degree in co-relation 5209. Up to 305 conditions per place. [2023-01-28 06:34:03,600 INFO L137 encePairwiseOnDemand]: 211/218 looper letters, 0 selfloop transitions, 0 changer transitions 210/210 dead transitions. [2023-01-28 06:34:03,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 210 transitions, 2384 flow [2023-01-28 06:34:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 06:34:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 06:34:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2342 transitions. [2023-01-28 06:34:03,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413196894848271 [2023-01-28 06:34:03,605 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2342 transitions. [2023-01-28 06:34:03,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2342 transitions. [2023-01-28 06:34:03,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:03,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2342 transitions. [2023-01-28 06:34:03,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 90.07692307692308) internal successors, (2342), 26 states have internal predecessors, (2342), 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) [2023-01-28 06:34:03,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 218.0) internal successors, (5886), 27 states have internal predecessors, (5886), 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) [2023-01-28 06:34:03,613 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 218.0) internal successors, (5886), 27 states have internal predecessors, (5886), 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) [2023-01-28 06:34:03,613 INFO L175 Difference]: Start difference. First operand has 184 places, 154 transitions, 1546 flow. Second operand 26 states and 2342 transitions. [2023-01-28 06:34:03,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 210 transitions, 2384 flow [2023-01-28 06:34:03,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 210 transitions, 1691 flow, removed 234 selfloop flow, removed 40 redundant places. [2023-01-28 06:34:03,633 INFO L231 Difference]: Finished difference. Result has 148 places, 0 transitions, 0 flow [2023-01-28 06:34:03,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=0, PETRI_PLACES=148, PETRI_TRANSITIONS=0} [2023-01-28 06:34:03,634 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 124 predicate places. [2023-01-28 06:34:03,634 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 0 transitions, 0 flow [2023-01-28 06:34:03,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 92.63636363636364) internal successors, (2038), 22 states have internal predecessors, (2038), 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) [2023-01-28 06:34:03,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 06:34:03,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 06:34:03,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 06:34:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:34:03,845 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:03,847 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 06:34:03,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-28 06:34:03,856 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-28 06:34:03,856 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:34:03,856 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. [2023-01-28 06:34:03,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-01-28 06:34:03,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-01-28 06:34:03,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:34:03,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-28 06:34:03,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-01-28 06:34:03,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-01-28 06:34:03,862 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-01-28 06:34:03,862 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:34:03,863 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. [2023-01-28 06:34:03,863 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-01-28 06:34:06,794 INFO L134 LiptonReduction]: Checked pairs total: 2420 [2023-01-28 06:34:06,795 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-01-28 06:34:06,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:34:06,796 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;@a72ce9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:34:06,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:34:06,798 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-28 06:34:06,798 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:34:06,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:06,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 06:34:06,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:34:06,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1033171735, now seen corresponding path program 1 times [2023-01-28 06:34:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:06,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075145477] [2023-01-28 06:34:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:34:06,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:34:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:34:06,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:34:06,823 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:34:06,823 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:34:06,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:34:06,823 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:34:06,823 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:34:06,824 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:34:06,824 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 06:34:06,866 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:34:06,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-01-28 06:34:06,882 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-01-28 06:34:06,882 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:34:06,883 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. [2023-01-28 06:34:06,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-01-28 06:34:06,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-01-28 06:34:06,884 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:34:06,884 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-01-28 06:34:06,884 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-01-28 06:34:06,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-01-28 06:34:06,938 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-01-28 06:34:06,939 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:34:06,940 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. [2023-01-28 06:34:06,945 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-01-28 06:34:11,170 INFO L134 LiptonReduction]: Checked pairs total: 30194 [2023-01-28 06:34:11,170 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-01-28 06:34:11,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:34:11,173 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;@a72ce9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:34:11,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 06:34:11,176 INFO L130 PetriNetUnfolder]: 7/49 cut-off events. [2023-01-28 06:34:11,176 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:34:11,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:11,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:11,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:11,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1222593382, now seen corresponding path program 1 times [2023-01-28 06:34:11,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:11,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515588912] [2023-01-28 06:34:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:11,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:11,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515588912] [2023-01-28 06:34:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515588912] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:34:11,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:34:11,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:34:11,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079318266] [2023-01-28 06:34:11,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:34:11,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 06:34:11,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:11,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 06:34:11,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 06:34:11,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-01-28 06:34:11,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 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) [2023-01-28 06:34:11,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:11,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-01-28 06:34:11,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:11,502 INFO L130 PetriNetUnfolder]: 1490/2518 cut-off events. [2023-01-28 06:34:11,502 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-01-28 06:34:11,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4876 conditions, 2518 events. 1490/2518 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14200 event pairs, 485 based on Foata normal form. 0/2079 useless extension candidates. Maximal degree in co-relation 4434. Up to 1776 conditions per place. [2023-01-28 06:34:11,510 INFO L137 encePairwiseOnDemand]: 333/348 looper letters, 93 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2023-01-28 06:34:11,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 113 transitions, 450 flow [2023-01-28 06:34:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 06:34:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 06:34:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 884 transitions. [2023-01-28 06:34:11,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080459770114942 [2023-01-28 06:34:11,512 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 884 transitions. [2023-01-28 06:34:11,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 884 transitions. [2023-01-28 06:34:11,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:11,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 884 transitions. [2023-01-28 06:34:11,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 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) [2023-01-28 06:34:11,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 348.0) internal successors, (2088), 6 states have internal predecessors, (2088), 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) [2023-01-28 06:34:11,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 348.0) internal successors, (2088), 6 states have internal predecessors, (2088), 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) [2023-01-28 06:34:11,515 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 144 flow. Second operand 5 states and 884 transitions. [2023-01-28 06:34:11,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 113 transitions, 450 flow [2023-01-28 06:34:11,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 113 transitions, 448 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 06:34:11,516 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 202 flow [2023-01-28 06:34:11,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2023-01-28 06:34:11,517 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-01-28 06:34:11,517 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 202 flow [2023-01-28 06:34:11,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 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) [2023-01-28 06:34:11,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:11,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 06:34:11,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:11,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1262345611, now seen corresponding path program 1 times [2023-01-28 06:34:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074933017] [2023-01-28 06:34:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074933017] [2023-01-28 06:34:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074933017] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:34:11,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:34:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:34:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056067488] [2023-01-28 06:34:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:34:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:34:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:34:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:34:11,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 348 [2023-01-28 06:34:11,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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) [2023-01-28 06:34:11,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:11,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 348 [2023-01-28 06:34:11,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:11,793 INFO L130 PetriNetUnfolder]: 2097/3409 cut-off events. [2023-01-28 06:34:11,793 INFO L131 PetriNetUnfolder]: For 1007/1017 co-relation queries the response was YES. [2023-01-28 06:34:11,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7569 conditions, 3409 events. 2097/3409 cut-off events. For 1007/1017 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20416 event pairs, 507 based on Foata normal form. 10/2985 useless extension candidates. Maximal degree in co-relation 4834. Up to 2681 conditions per place. [2023-01-28 06:34:11,810 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 78 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2023-01-28 06:34:11,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 449 flow [2023-01-28 06:34:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:34:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:34:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-01-28 06:34:11,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2023-01-28 06:34:11,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-01-28 06:34:11,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-01-28 06:34:11,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:11,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-01-28 06:34:11,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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) [2023-01-28 06:34:11,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 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) [2023-01-28 06:34:11,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 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) [2023-01-28 06:34:11,824 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 202 flow. Second operand 3 states and 546 transitions. [2023-01-28 06:34:11,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 449 flow [2023-01-28 06:34:11,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:34:11,826 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 223 flow [2023-01-28 06:34:11,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2023-01-28 06:34:11,827 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-01-28 06:34:11,827 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 223 flow [2023-01-28 06:34:11,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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) [2023-01-28 06:34:11,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:11,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:11,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 06:34:11,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:11,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2082166543, now seen corresponding path program 1 times [2023-01-28 06:34:11,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:11,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82557201] [2023-01-28 06:34:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:11,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:11,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:11,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82557201] [2023-01-28 06:34:11,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82557201] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:34:11,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:34:11,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:34:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751138994] [2023-01-28 06:34:11,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:34:11,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:34:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:34:11,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:34:11,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 348 [2023-01-28 06:34:11,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 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) [2023-01-28 06:34:11,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:11,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 348 [2023-01-28 06:34:11,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:12,460 INFO L130 PetriNetUnfolder]: 2989/4839 cut-off events. [2023-01-28 06:34:12,461 INFO L131 PetriNetUnfolder]: For 1306/1316 co-relation queries the response was YES. [2023-01-28 06:34:12,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10921 conditions, 4839 events. 2989/4839 cut-off events. For 1306/1316 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30167 event pairs, 809 based on Foata normal form. 10/4321 useless extension candidates. Maximal degree in co-relation 7999. Up to 2699 conditions per place. [2023-01-28 06:34:12,496 INFO L137 encePairwiseOnDemand]: 340/348 looper letters, 151 selfloop transitions, 8 changer transitions 0/172 dead transitions. [2023-01-28 06:34:12,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 172 transitions, 830 flow [2023-01-28 06:34:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:34:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:34:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1037 transitions. [2023-01-28 06:34:12,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966475095785441 [2023-01-28 06:34:12,498 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1037 transitions. [2023-01-28 06:34:12,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1037 transitions. [2023-01-28 06:34:12,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:12,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1037 transitions. [2023-01-28 06:34:12,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.83333333333334) internal successors, (1037), 6 states have internal predecessors, (1037), 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) [2023-01-28 06:34:12,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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) [2023-01-28 06:34:12,501 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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) [2023-01-28 06:34:12,501 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 223 flow. Second operand 6 states and 1037 transitions. [2023-01-28 06:34:12,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 172 transitions, 830 flow [2023-01-28 06:34:12,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 172 transitions, 826 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:34:12,504 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 268 flow [2023-01-28 06:34:12,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-01-28 06:34:12,504 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2023-01-28 06:34:12,505 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 268 flow [2023-01-28 06:34:12,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 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) [2023-01-28 06:34:12,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:12,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:12,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 06:34:12,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:12,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash -904241901, now seen corresponding path program 1 times [2023-01-28 06:34:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:12,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264781657] [2023-01-28 06:34:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:12,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:34:12,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264781657] [2023-01-28 06:34:12,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264781657] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:34:12,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:34:12,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:34:12,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466852767] [2023-01-28 06:34:12,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:34:12,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:34:12,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:12,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:34:12,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:34:12,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 348 [2023-01-28 06:34:12,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 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) [2023-01-28 06:34:12,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:12,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 348 [2023-01-28 06:34:12,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:13,278 INFO L130 PetriNetUnfolder]: 4391/7065 cut-off events. [2023-01-28 06:34:13,278 INFO L131 PetriNetUnfolder]: For 2228/2238 co-relation queries the response was YES. [2023-01-28 06:34:13,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16593 conditions, 7065 events. 4391/7065 cut-off events. For 2228/2238 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 45539 event pairs, 1226 based on Foata normal form. 10/6287 useless extension candidates. Maximal degree in co-relation 12593. Up to 4153 conditions per place. [2023-01-28 06:34:13,307 INFO L137 encePairwiseOnDemand]: 340/348 looper letters, 163 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2023-01-28 06:34:13,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 185 transitions, 989 flow [2023-01-28 06:34:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:34:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:34:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1034 transitions. [2023-01-28 06:34:13,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4952107279693487 [2023-01-28 06:34:13,309 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1034 transitions. [2023-01-28 06:34:13,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1034 transitions. [2023-01-28 06:34:13,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:13,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1034 transitions. [2023-01-28 06:34:13,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.33333333333334) internal successors, (1034), 6 states have internal predecessors, (1034), 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) [2023-01-28 06:34:13,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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) [2023-01-28 06:34:13,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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) [2023-01-28 06:34:13,312 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 268 flow. Second operand 6 states and 1034 transitions. [2023-01-28 06:34:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 185 transitions, 989 flow [2023-01-28 06:34:13,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 185 transitions, 979 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:34:13,317 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 314 flow [2023-01-28 06:34:13,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-01-28 06:34:13,318 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-01-28 06:34:13,318 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 314 flow [2023-01-28 06:34:13,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 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) [2023-01-28 06:34:13,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:13,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:13,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 06:34:13,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:13,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1333451796, now seen corresponding path program 1 times [2023-01-28 06:34:13,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:13,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206155029] [2023-01-28 06:34:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:13,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:13,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:13,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206155029] [2023-01-28 06:34:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206155029] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:34:13,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:34:13,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-28 06:34:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570261607] [2023-01-28 06:34:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:34:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 06:34:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 06:34:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-01-28 06:34:13,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 348 [2023-01-28 06:34:13,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 314 flow. Second operand has 11 states, 11 states have (on average 118.81818181818181) internal successors, (1307), 11 states have internal predecessors, (1307), 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) [2023-01-28 06:34:13,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:13,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 348 [2023-01-28 06:34:13,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:15,859 INFO L130 PetriNetUnfolder]: 8749/13945 cut-off events. [2023-01-28 06:34:15,859 INFO L131 PetriNetUnfolder]: For 3750/3762 co-relation queries the response was YES. [2023-01-28 06:34:15,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33276 conditions, 13945 events. 8749/13945 cut-off events. For 3750/3762 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 94759 event pairs, 1202 based on Foata normal form. 12/12586 useless extension candidates. Maximal degree in co-relation 28141. Up to 5909 conditions per place. [2023-01-28 06:34:15,919 INFO L137 encePairwiseOnDemand]: 325/348 looper letters, 437 selfloop transitions, 102 changer transitions 0/551 dead transitions. [2023-01-28 06:34:15,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 551 transitions, 2895 flow [2023-01-28 06:34:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 06:34:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 06:34:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2717 transitions. [2023-01-28 06:34:15,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109195402298851 [2023-01-28 06:34:15,922 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2717 transitions. [2023-01-28 06:34:15,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2717 transitions. [2023-01-28 06:34:15,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:15,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2717 transitions. [2023-01-28 06:34:15,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 143.0) internal successors, (2717), 19 states have internal predecessors, (2717), 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) [2023-01-28 06:34:15,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 348.0) internal successors, (6960), 20 states have internal predecessors, (6960), 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) [2023-01-28 06:34:15,931 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 348.0) internal successors, (6960), 20 states have internal predecessors, (6960), 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) [2023-01-28 06:34:15,931 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 314 flow. Second operand 19 states and 2717 transitions. [2023-01-28 06:34:15,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 551 transitions, 2895 flow [2023-01-28 06:34:15,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 551 transitions, 2878 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:34:15,941 INFO L231 Difference]: Finished difference. Result has 110 places, 196 transitions, 1098 flow [2023-01-28 06:34:15,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1098, PETRI_PLACES=110, PETRI_TRANSITIONS=196} [2023-01-28 06:34:15,941 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2023-01-28 06:34:15,941 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 196 transitions, 1098 flow [2023-01-28 06:34:15,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.81818181818181) internal successors, (1307), 11 states have internal predecessors, (1307), 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) [2023-01-28 06:34:15,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:15,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:15,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 06:34:15,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:15,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash -473546947, now seen corresponding path program 1 times [2023-01-28 06:34:15,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:15,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827555310] [2023-01-28 06:34:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:15,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:16,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:16,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827555310] [2023-01-28 06:34:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827555310] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:34:16,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825078371] [2023-01-28 06:34:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:16,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:34:16,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:34:16,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:34:16,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 06:34:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:16,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 06:34:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:34:16,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 06:34:16,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 06:34:16,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 06:34:16,639 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 06:34:16,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2023-01-28 06:34:16,749 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 06:34:16,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-01-28 06:34:16,821 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 06:34:16,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-01-28 06:34:16,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 06:34:16,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 06:34:16,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-01-28 06:34:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:16,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:34:16,990 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-01-28 06:34:16,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 66 [2023-01-28 06:34:16,994 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:16,994 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2023-01-28 06:34:17,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2023-01-28 06:34:17,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2023-01-28 06:34:17,078 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 06:34:17,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-01-28 06:34:17,081 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 06:34:17,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-01-28 06:34:17,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-01-28 06:34:17,222 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_832 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_832) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (not (= |c_thr1Thread1of2ForFork0_index_malloc_~curr_alloc_idx~0#1| 0))) is different from false [2023-01-28 06:34:17,494 WARN L839 $PredicateComparison]: unable to prove that (and (or (not (= c_~next_alloc_idx~0 0)) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int) (|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (or (not (= (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_830) |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|)))) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (forall ((v_ArrVal_830 (Array Int Int))) (not (= 0 (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_830) |c_~#top~0.base|) 0) 1)))) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|))) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (forall ((v_ArrVal_830 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_830))) (or (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select .cse0 |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0))) (forall ((v_ArrVal_832 (Array Int Int))) (= 0 (select (select (store .cse0 |c_~#m~0.base| v_ArrVal_832) |c_~#top~0.base|) |c_~#top~0.offset|))))))))) is different from false [2023-01-28 06:34:17,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:17,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-01-28 06:34:17,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:17,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2023-01-28 06:34:17,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-01-28 06:34:17,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:17,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 35 [2023-01-28 06:34:17,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:17,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 145 [2023-01-28 06:34:17,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:17,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2023-01-28 06:34:17,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-01-28 06:34:17,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:17,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-01-28 06:34:17,694 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 06:34:17,700 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 06:34:17,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 14 [2023-01-28 06:34:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825078371] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:34:17,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:34:17,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 32 [2023-01-28 06:34:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755125623] [2023-01-28 06:34:17,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:34:17,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 06:34:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 06:34:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=897, Unknown=13, NotChecked=122, Total=1122 [2023-01-28 06:34:17,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 348 [2023-01-28 06:34:17,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 196 transitions, 1098 flow. Second operand has 34 states, 34 states have (on average 112.79411764705883) internal successors, (3835), 34 states have internal predecessors, (3835), 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) [2023-01-28 06:34:17,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:17,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 348 [2023-01-28 06:34:17,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:34:20,641 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= c_~next_alloc_idx~0 0))) (.cse1 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0))))) (and (not (= |c_~#m~0.base| |c_~#top~0.base|)) (= |c_~#top~0.offset| 0) (or .cse0 (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int) (|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (or (not (= (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_830) |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|)))) .cse0 (not (= (+ (select (select |c_#memory_int| |c_~#top~0.base|) 0) 1) 0)) (or .cse0 .cse1) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (forall ((v_ArrVal_830 (Array Int Int))) (not (= 0 (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_830) |c_~#top~0.base|) 0) 1)))) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|))) (or (forall ((v_ArrVal_832 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_832) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) .cse1) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (forall ((v_ArrVal_830 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_830))) (or (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select .cse2 |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0))) (forall ((v_ArrVal_832 (Array Int Int))) (= 0 (select (select (store .cse2 |c_~#m~0.base| v_ArrVal_832) |c_~#top~0.base|) |c_~#top~0.offset|)))))))) (< |c_~#top~0.base| |c_~#m2~0.base|))) is different from false [2023-01-28 06:34:24,298 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (not (= c_~next_alloc_idx~0 0))) (.cse3 (select |c_#memory_int| |c_~#top~0.base|)) (.cse2 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0)))) (.cse0 (forall ((v_ArrVal_832 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_832) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) (.cse4 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0))))) (and .cse0 (or .cse1 .cse2) .cse1 (not (= (+ (select .cse3 0) 1) 0)) (or .cse1 .cse4) (not (= (+ (select .cse3 |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (or .cse0 .cse2) (or .cse0 .cse4))) is different from false [2023-01-28 06:34:27,485 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_832 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_832) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (not (= c_~next_alloc_idx~0 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (not (= |c_thr1Thread1of2ForFork0_index_malloc_~curr_alloc_idx~0#1| 0))) is different from false [2023-01-28 06:34:52,077 INFO L130 PetriNetUnfolder]: 61845/100981 cut-off events. [2023-01-28 06:34:52,077 INFO L131 PetriNetUnfolder]: For 125970/126013 co-relation queries the response was YES. [2023-01-28 06:34:52,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314765 conditions, 100981 events. 61845/100981 cut-off events. For 125970/126013 co-relation queries the response was YES. Maximal size of possible extension queue 3614. Compared 911259 event pairs, 2136 based on Foata normal form. 1077/94977 useless extension candidates. Maximal degree in co-relation 279369. Up to 16396 conditions per place. [2023-01-28 06:34:53,047 INFO L137 encePairwiseOnDemand]: 300/348 looper letters, 4027 selfloop transitions, 2064 changer transitions 0/6103 dead transitions. [2023-01-28 06:34:53,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 6103 transitions, 41263 flow [2023-01-28 06:34:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2023-01-28 06:34:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2023-01-28 06:34:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 27789 transitions. [2023-01-28 06:34:53,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802545155993432 [2023-01-28 06:34:53,082 INFO L72 ComplementDD]: Start complementDD. Operand 210 states and 27789 transitions. [2023-01-28 06:34:53,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 210 states and 27789 transitions. [2023-01-28 06:34:53,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:34:53,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 210 states and 27789 transitions. [2023-01-28 06:34:53,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 211 states, 210 states have (on average 132.32857142857142) internal successors, (27789), 210 states have internal predecessors, (27789), 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) [2023-01-28 06:34:53,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 211 states, 211 states have (on average 348.0) internal successors, (73428), 211 states have internal predecessors, (73428), 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) [2023-01-28 06:34:53,208 INFO L81 ComplementDD]: Finished complementDD. Result has 211 states, 211 states have (on average 348.0) internal successors, (73428), 211 states have internal predecessors, (73428), 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) [2023-01-28 06:34:53,208 INFO L175 Difference]: Start difference. First operand has 110 places, 196 transitions, 1098 flow. Second operand 210 states and 27789 transitions. [2023-01-28 06:34:53,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 6103 transitions, 41263 flow [2023-01-28 06:34:53,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 6103 transitions, 41213 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 06:34:53,832 INFO L231 Difference]: Finished difference. Result has 496 places, 2462 transitions, 23229 flow [2023-01-28 06:34:53,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=210, PETRI_FLOW=23229, PETRI_PLACES=496, PETRI_TRANSITIONS=2462} [2023-01-28 06:34:53,833 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 439 predicate places. [2023-01-28 06:34:53,833 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 2462 transitions, 23229 flow [2023-01-28 06:34:53,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 112.79411764705883) internal successors, (3835), 34 states have internal predecessors, (3835), 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) [2023-01-28 06:34:53,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:34:53,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:34:53,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 06:34:54,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 06:34:54,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:34:54,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:34:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash -718235579, now seen corresponding path program 2 times [2023-01-28 06:34:54,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:34:54,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929405069] [2023-01-28 06:34:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:34:54,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:34:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:34:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:54,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:34:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929405069] [2023-01-28 06:34:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929405069] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:34:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166408496] [2023-01-28 06:34:54,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 06:34:54,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:34:54,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:34:54,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:34:54,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 06:34:54,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 06:34:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:34:54,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 06:34:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:34:54,557 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 06:34:54,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 06:34:55,037 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-01-28 06:34:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-01-28 06:34:55,064 INFO L321 Elim1Store]: treesize reduction 30, result has 43.4 percent of original size [2023-01-28 06:34:55,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 81 [2023-01-28 06:34:55,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-01-28 06:34:55,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-01-28 06:34:55,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-01-28 06:34:55,120 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:55,120 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2023-01-28 06:34:55,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 06:34:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:34:55,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:34:55,211 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_901) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) is different from false [2023-01-28 06:34:55,381 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2023-01-28 06:34:55,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 73 [2023-01-28 06:34:55,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:55,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-01-28 06:34:55,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:55,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 213 [2023-01-28 06:34:55,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 06:34:55,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2023-01-28 06:34:55,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-01-28 06:34:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-28 06:34:57,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166408496] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:34:57,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:34:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-28 06:34:57,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902340869] [2023-01-28 06:34:57,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:34:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 06:34:57,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:34:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 06:34:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=602, Unknown=22, NotChecked=50, Total=756 [2023-01-28 06:34:57,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 348 [2023-01-28 06:34:57,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2462 transitions, 23229 flow. Second operand has 28 states, 28 states have (on average 105.21428571428571) internal successors, (2946), 28 states have internal predecessors, (2946), 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) [2023-01-28 06:34:57,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:34:57,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 348 [2023-01-28 06:34:57,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:36:57,351 INFO L130 PetriNetUnfolder]: 128189/208946 cut-off events. [2023-01-28 06:36:57,352 INFO L131 PetriNetUnfolder]: For 19116300/19116401 co-relation queries the response was YES. [2023-01-28 06:37:07,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1985221 conditions, 208946 events. 128189/208946 cut-off events. For 19116300/19116401 co-relation queries the response was YES. Maximal size of possible extension queue 6886. Compared 2046449 event pairs, 6435 based on Foata normal form. 1174/194263 useless extension candidates. Maximal degree in co-relation 1883167. Up to 67067 conditions per place. [2023-01-28 06:37:09,181 INFO L137 encePairwiseOnDemand]: 323/348 looper letters, 4296 selfloop transitions, 4550 changer transitions 0/8858 dead transitions. [2023-01-28 06:37:09,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 8858 transitions, 146206 flow [2023-01-28 06:37:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-01-28 06:37:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-01-28 06:37:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 13885 transitions. [2023-01-28 06:37:09,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36943912303107707 [2023-01-28 06:37:09,194 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 13885 transitions. [2023-01-28 06:37:09,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 13885 transitions. [2023-01-28 06:37:09,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:37:09,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 13885 transitions. [2023-01-28 06:37:09,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 128.5648148148148) internal successors, (13885), 108 states have internal predecessors, (13885), 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) [2023-01-28 06:37:09,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 348.0) internal successors, (37932), 109 states have internal predecessors, (37932), 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) [2023-01-28 06:37:09,241 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 348.0) internal successors, (37932), 109 states have internal predecessors, (37932), 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) [2023-01-28 06:37:09,241 INFO L175 Difference]: Start difference. First operand has 496 places, 2462 transitions, 23229 flow. Second operand 108 states and 13885 transitions. [2023-01-28 06:37:09,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 8858 transitions, 146206 flow