/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 02:31:24,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 02:31:24,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 02:31:24,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 02:31:24,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 02:31:24,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 02:31:24,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 02:31:24,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 02:31:24,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 02:31:24,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 02:31:24,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 02:31:24,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 02:31:24,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 02:31:24,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 02:31:24,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 02:31:24,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 02:31:24,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 02:31:24,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 02:31:24,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 02:31:24,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 02:31:24,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 02:31:24,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 02:31:24,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 02:31:24,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 02:31:24,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 02:31:24,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 02:31:24,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 02:31:24,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 02:31:24,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 02:31:24,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 02:31:24,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 02:31:24,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 02:31:24,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 02:31:24,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 02:31:24,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 02:31:24,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 02:31:24,554 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-SemanticLbe.epf [2020-10-16 02:31:24,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 02:31:24,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 02:31:24,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 02:31:24,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 02:31:24,595 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 02:31:24,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 02:31:24,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 02:31:24,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 02:31:24,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 02:31:24,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 02:31:24,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 02:31:24,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 02:31:24,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 02:31:24,599 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 02:31:24,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 02:31:24,600 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 02:31:24,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 02:31:24,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 02:31:24,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 02:31:24,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 02:31:24,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 02:31:24,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 02:31:24,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 02:31:24,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 02:31:24,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 02:31:24,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 02:31:24,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 02:31:24,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 02:31:24,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 02:31:24,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 02:31:24,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 02:31:24,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 02:31:24,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 02:31:24,966 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 02:31:24,967 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-16 02:31:25,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aba61a794/0788f16b8bb94cf6bfae4f831dfbff1d/FLAG5d50ec4b0 [2020-10-16 02:31:25,546 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 02:31:25,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-16 02:31:25,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aba61a794/0788f16b8bb94cf6bfae4f831dfbff1d/FLAG5d50ec4b0 [2020-10-16 02:31:25,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aba61a794/0788f16b8bb94cf6bfae4f831dfbff1d [2020-10-16 02:31:25,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 02:31:25,862 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 02:31:25,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 02:31:25,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 02:31:25,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 02:31:25,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:31:25" (1/1) ... [2020-10-16 02:31:25,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a0ff15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:25, skipping insertion in model container [2020-10-16 02:31:25,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:31:25" (1/1) ... [2020-10-16 02:31:25,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 02:31:25,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 02:31:26,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:31:26,509 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 02:31:26,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:31:26,702 INFO L208 MainTranslator]: Completed translation [2020-10-16 02:31:26,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26 WrapperNode [2020-10-16 02:31:26,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 02:31:26,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 02:31:26,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 02:31:26,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 02:31:26,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 02:31:26,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 02:31:26,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 02:31:26,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 02:31:26,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... [2020-10-16 02:31:26,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 02:31:26,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 02:31:26,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 02:31:26,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 02:31:26,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 02:31:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-16 02:31:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 02:31:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 02:31:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-10-16 02:31:26,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-10-16 02:31:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 02:31:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 02:31:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 02:31:26,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 02:31:26,887 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 02:31:27,333 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 02:31:27,334 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-16 02:31:27,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:31:27 BoogieIcfgContainer [2020-10-16 02:31:27,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 02:31:27,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 02:31:27,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 02:31:27,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 02:31:27,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:31:25" (1/3) ... [2020-10-16 02:31:27,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c13cc1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:31:27, skipping insertion in model container [2020-10-16 02:31:27,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:26" (2/3) ... [2020-10-16 02:31:27,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c13cc1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:31:27, skipping insertion in model container [2020-10-16 02:31:27,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:31:27" (3/3) ... [2020-10-16 02:31:27,347 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-1.i [2020-10-16 02:31:27,360 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 02:31:27,368 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 02:31:27,369 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 02:31:27,392 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,392 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,394 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,398 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,398 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,399 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,399 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,399 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:27,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:27,444 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:27,445 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:27,445 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:27,445 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:27,445 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:27,445 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:27,445 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:27,445 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:27,458 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 02:31:27,512 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-10-16 02:31:27,512 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:31:27,517 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-10-16 02:31:27,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 02:31:27,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:27,526 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:27,530 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:27,533 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:27,534 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:27,559 INFO L129 PetriNetUnfolder]: 10/89 cut-off events. [2020-10-16 02:31:27,559 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:31:27,560 INFO L80 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 89 events. 10/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-10-16 02:31:27,562 INFO L117 LiptonReduction]: Number of co-enabled transitions 300 [2020-10-16 02:31:29,140 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:29,232 INFO L132 LiptonReduction]: Checked pairs total: 320 [2020-10-16 02:31:29,232 INFO L134 LiptonReduction]: Total number of compositions: 56 [2020-10-16 02:31:29,236 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1712 [2020-10-16 02:31:29,245 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:29,245 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:29,245 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:29,246 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:29,247 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash 8319830, now seen corresponding path program 1 times [2020-10-16 02:31:29,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:29,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084627715] [2020-10-16 02:31:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:29,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084627715] [2020-10-16 02:31:29,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:29,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:29,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034107856] [2020-10-16 02:31:29,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:29,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:29,512 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 127 [2020-10-16 02:31:29,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states. [2020-10-16 02:31:29,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:29,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 127 [2020-10-16 02:31:29,517 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:29,554 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2020-10-16 02:31:29,554 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:31:29,555 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 18 events. 2/18 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 16. Up to 13 conditions per place. [2020-10-16 02:31:29,556 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 8 selfloop transitions, 2 changer transitions 0/14 dead transitions. [2020-10-16 02:31:29,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 14 transitions, 56 flow [2020-10-16 02:31:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2020-10-16 02:31:29,575 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5013123359580053 [2020-10-16 02:31:29,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2020-10-16 02:31:29,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2020-10-16 02:31:29,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:29,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2020-10-16 02:31:29,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:29,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:29,594 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:29,597 INFO L185 Difference]: Start difference. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states and 191 transitions. [2020-10-16 02:31:29,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 14 transitions, 56 flow [2020-10-16 02:31:29,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:29,604 INFO L241 Difference]: Finished difference. Result has 17 places, 13 transitions, 42 flow [2020-10-16 02:31:29,608 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2020-10-16 02:31:29,609 INFO L342 CegarLoopForPetriNet]: 14 programPoint places, 3 predicate places. [2020-10-16 02:31:29,610 INFO L481 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 42 flow [2020-10-16 02:31:29,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:29,610 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:29,610 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2020-10-16 02:31:29,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 02:31:29,611 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:29,612 INFO L82 PathProgramCache]: Analyzing trace with hash -603160687, now seen corresponding path program 1 times [2020-10-16 02:31:29,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:29,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7338367] [2020-10-16 02:31:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:29,647 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:29,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:29,717 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:29,717 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:29,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 02:31:29,719 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:29,721 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:29,722 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 02:31:29,734 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,737 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,737 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,737 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,738 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,738 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,738 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,738 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,739 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,739 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,740 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,741 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,741 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,741 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,742 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,742 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,743 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,743 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,743 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,747 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,747 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,747 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,747 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,748 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:29,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:29,758 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:29,758 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:29,758 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:29,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:29,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:29,759 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:29,759 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:29,759 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:29,761 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 02:31:29,793 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-10-16 02:31:29,794 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 02:31:29,796 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 183 events. 23/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 462 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-10-16 02:31:29,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 02:31:29,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:29,798 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:29,798 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:29,798 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:29,798 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:29,825 INFO L129 PetriNetUnfolder]: 19/155 cut-off events. [2020-10-16 02:31:29,828 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 02:31:29,829 INFO L80 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 155 events. 19/155 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 91. Up to 8 conditions per place. [2020-10-16 02:31:29,833 INFO L117 LiptonReduction]: Number of co-enabled transitions 760 [2020-10-16 02:31:30,966 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-16 02:31:31,288 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:31:31,295 INFO L132 LiptonReduction]: Checked pairs total: 1958 [2020-10-16 02:31:31,296 INFO L134 LiptonReduction]: Total number of compositions: 54 [2020-10-16 02:31:31,296 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1498 [2020-10-16 02:31:31,298 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:31,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:31,299 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:31,299 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:31,299 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 12600976, now seen corresponding path program 1 times [2020-10-16 02:31:31,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:31,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450511852] [2020-10-16 02:31:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:31,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450511852] [2020-10-16 02:31:31,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:31,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527814926] [2020-10-16 02:31:31,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:31,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:31,339 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 02:31:31,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states. [2020-10-16 02:31:31,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:31,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 02:31:31,340 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:31,378 INFO L129 PetriNetUnfolder]: 6/45 cut-off events. [2020-10-16 02:31:31,378 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 02:31:31,379 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 45 events. 6/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 26 conditions per place. [2020-10-16 02:31:31,379 INFO L132 encePairwiseOnDemand]: 129/132 looper letters, 9 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2020-10-16 02:31:31,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 88 flow [2020-10-16 02:31:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2020-10-16 02:31:31,383 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 02:31:31,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2020-10-16 02:31:31,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2020-10-16 02:31:31,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:31,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2020-10-16 02:31:31,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:31,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:31,386 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:31,387 INFO L185 Difference]: Start difference. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states and 213 transitions. [2020-10-16 02:31:31,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 88 flow [2020-10-16 02:31:31,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:31,389 INFO L241 Difference]: Finished difference. Result has 27 places, 23 transitions, 74 flow [2020-10-16 02:31:31,389 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2020-10-16 02:31:31,389 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2020-10-16 02:31:31,390 INFO L481 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 74 flow [2020-10-16 02:31:31,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:31,390 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:31,390 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:31,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 02:31:31,390 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1920961359, now seen corresponding path program 1 times [2020-10-16 02:31:31,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:31,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544863633] [2020-10-16 02:31:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:31,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544863633] [2020-10-16 02:31:31,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:31,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:31,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944517898] [2020-10-16 02:31:31,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:31,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:31,454 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 02:31:31,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states. [2020-10-16 02:31:31,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:31,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 02:31:31,455 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:31,493 INFO L129 PetriNetUnfolder]: 5/49 cut-off events. [2020-10-16 02:31:31,494 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-16 02:31:31,494 INFO L80 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 49 events. 5/49 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 83. Up to 20 conditions per place. [2020-10-16 02:31:31,495 INFO L132 encePairwiseOnDemand]: 125/132 looper letters, 8 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2020-10-16 02:31:31,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 110 flow [2020-10-16 02:31:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2020-10-16 02:31:31,499 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 02:31:31,499 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2020-10-16 02:31:31,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2020-10-16 02:31:31,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:31,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2020-10-16 02:31:31,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:31,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:31,503 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:31,503 INFO L185 Difference]: Start difference. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states and 284 transitions. [2020-10-16 02:31:31,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 110 flow [2020-10-16 02:31:31,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:31,505 INFO L241 Difference]: Finished difference. Result has 30 places, 25 transitions, 100 flow [2020-10-16 02:31:31,506 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2020-10-16 02:31:31,506 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2020-10-16 02:31:31,507 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 100 flow [2020-10-16 02:31:31,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:31,507 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:31,507 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-16 02:31:31,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 02:31:31,507 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1347590472, now seen corresponding path program 1 times [2020-10-16 02:31:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:31,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752689991] [2020-10-16 02:31:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:31,528 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:31,551 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:31,568 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:31,569 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:31,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 02:31:31,569 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:31,570 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:31,573 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 02:31:31,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,587 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,587 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,588 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,588 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,588 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,589 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,589 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,591 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,591 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,592 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,592 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,592 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,592 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,592 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,593 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,593 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,594 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,596 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,596 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,596 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,596 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,596 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,600 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,600 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,600 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,600 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,601 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,603 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,604 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,604 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,604 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,604 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:31,609 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:31,609 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:31,609 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:31,609 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:31,609 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:31,609 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:31,609 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:31,610 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:31,611 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 02:31:31,653 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-10-16 02:31:31,653 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 02:31:31,654 INFO L80 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 330 events. 45/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1084 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-10-16 02:31:31,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 02:31:31,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:31,657 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:31,657 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:31,657 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:31,657 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:31,683 INFO L129 PetriNetUnfolder]: 37/274 cut-off events. [2020-10-16 02:31:31,684 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 02:31:31,685 INFO L80 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 274 events. 37/274 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 784 event pairs, 1 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 163. Up to 16 conditions per place. [2020-10-16 02:31:31,689 INFO L117 LiptonReduction]: Number of co-enabled transitions 1260 [2020-10-16 02:31:32,928 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-16 02:31:33,245 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-16 02:31:33,377 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-16 02:31:33,535 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-16 02:31:33,617 INFO L132 LiptonReduction]: Checked pairs total: 3644 [2020-10-16 02:31:33,617 INFO L134 LiptonReduction]: Total number of compositions: 57 [2020-10-16 02:31:33,617 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1960 [2020-10-16 02:31:33,620 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:33,620 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:33,620 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:33,620 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:33,620 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash 17184692, now seen corresponding path program 1 times [2020-10-16 02:31:33,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:33,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109371988] [2020-10-16 02:31:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:33,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109371988] [2020-10-16 02:31:33,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:33,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:33,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129362220] [2020-10-16 02:31:33,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:33,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:33,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:33,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:33,664 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 02:31:33,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states. [2020-10-16 02:31:33,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:33,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 02:31:33,665 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:33,698 INFO L129 PetriNetUnfolder]: 15/85 cut-off events. [2020-10-16 02:31:33,698 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 02:31:33,699 INFO L80 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 85 events. 15/85 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 1 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 89. Up to 49 conditions per place. [2020-10-16 02:31:33,699 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 9 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2020-10-16 02:31:33,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 110 flow [2020-10-16 02:31:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2020-10-16 02:31:33,702 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 02:31:33,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2020-10-16 02:31:33,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2020-10-16 02:31:33,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:33,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2020-10-16 02:31:33,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:33,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:33,706 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:33,706 INFO L185 Difference]: Start difference. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states and 240 transitions. [2020-10-16 02:31:33,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 110 flow [2020-10-16 02:31:33,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:33,708 INFO L241 Difference]: Finished difference. Result has 33 places, 28 transitions, 96 flow [2020-10-16 02:31:33,709 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2020-10-16 02:31:33,709 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2020-10-16 02:31:33,709 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 96 flow [2020-10-16 02:31:33,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:33,710 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:33,710 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:33,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 02:31:33,710 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1206663488, now seen corresponding path program 1 times [2020-10-16 02:31:33,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:33,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585168960] [2020-10-16 02:31:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585168960] [2020-10-16 02:31:33,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:33,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:33,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268552362] [2020-10-16 02:31:33,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:33,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:33,774 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 02:31:33,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states. [2020-10-16 02:31:33,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:33,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 02:31:33,775 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:33,823 INFO L129 PetriNetUnfolder]: 15/100 cut-off events. [2020-10-16 02:31:33,824 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 02:31:33,824 INFO L80 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 100 events. 15/100 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 280 event pairs, 4 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 181. Up to 44 conditions per place. [2020-10-16 02:31:33,825 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 8 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2020-10-16 02:31:33,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 132 flow [2020-10-16 02:31:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2020-10-16 02:31:33,828 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 02:31:33,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2020-10-16 02:31:33,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2020-10-16 02:31:33,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:33,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2020-10-16 02:31:33,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:33,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:33,832 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:33,833 INFO L185 Difference]: Start difference. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states and 320 transitions. [2020-10-16 02:31:33,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 132 flow [2020-10-16 02:31:33,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:33,835 INFO L241 Difference]: Finished difference. Result has 36 places, 30 transitions, 122 flow [2020-10-16 02:31:33,836 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2020-10-16 02:31:33,836 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2020-10-16 02:31:33,836 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 122 flow [2020-10-16 02:31:33,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:33,836 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:33,836 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-10-16 02:31:33,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 02:31:33,837 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 703601145, now seen corresponding path program 1 times [2020-10-16 02:31:33,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:33,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879001483] [2020-10-16 02:31:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:33,856 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:33,869 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:33,877 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:33,877 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:33,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 02:31:33,878 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:33,879 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:33,879 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 02:31:33,888 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,889 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,889 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,889 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,889 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,889 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,889 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,890 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,890 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,890 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,890 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,890 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,891 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,891 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,892 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,892 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,893 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,893 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,893 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,893 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,894 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,894 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,894 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,895 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,895 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,895 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,895 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,895 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,896 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,896 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,896 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,896 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,896 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,902 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,903 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,903 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,903 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,903 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,909 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,910 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,910 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,910 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,910 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,919 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,920 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,920 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,920 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,920 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:33,930 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:33,931 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:33,931 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:33,931 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:33,931 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:33,931 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:33,932 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:33,932 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:33,932 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:33,934 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 02:31:34,012 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-10-16 02:31:34,012 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 02:31:34,017 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 613 events. 91/613 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2762 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-10-16 02:31:34,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 02:31:34,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:34,020 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:34,020 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:34,020 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:34,020 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:34,068 INFO L129 PetriNetUnfolder]: 75/501 cut-off events. [2020-10-16 02:31:34,068 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 02:31:34,069 INFO L80 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 501 events. 75/501 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2027 event pairs, 6 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 294. Up to 32 conditions per place. [2020-10-16 02:31:34,078 INFO L117 LiptonReduction]: Number of co-enabled transitions 1840 [2020-10-16 02:31:35,220 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-16 02:31:35,474 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:35,561 INFO L132 LiptonReduction]: Checked pairs total: 6546 [2020-10-16 02:31:35,562 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 02:31:35,562 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1542 [2020-10-16 02:31:35,564 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:35,564 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:35,564 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:35,564 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:35,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash 22048377, now seen corresponding path program 1 times [2020-10-16 02:31:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:35,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320252582] [2020-10-16 02:31:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:35,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320252582] [2020-10-16 02:31:35,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:35,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:35,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680358080] [2020-10-16 02:31:35,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:35,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:35,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:35,610 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 02:31:35,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states. [2020-10-16 02:31:35,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:35,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 02:31:35,610 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:35,651 INFO L129 PetriNetUnfolder]: 36/161 cut-off events. [2020-10-16 02:31:35,651 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 02:31:35,652 INFO L80 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 161 events. 36/161 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 514 event pairs, 6 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 166. Up to 92 conditions per place. [2020-10-16 02:31:35,653 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 9 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2020-10-16 02:31:35,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 134 flow [2020-10-16 02:31:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2020-10-16 02:31:35,655 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 02:31:35,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2020-10-16 02:31:35,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2020-10-16 02:31:35,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:35,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2020-10-16 02:31:35,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:35,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:35,658 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:35,659 INFO L185 Difference]: Start difference. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states and 261 transitions. [2020-10-16 02:31:35,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 134 flow [2020-10-16 02:31:35,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:35,662 INFO L241 Difference]: Finished difference. Result has 39 places, 33 transitions, 120 flow [2020-10-16 02:31:35,662 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2020-10-16 02:31:35,662 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2020-10-16 02:31:35,662 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 120 flow [2020-10-16 02:31:35,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:35,662 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:35,663 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:35,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 02:31:35,663 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash -161501305, now seen corresponding path program 1 times [2020-10-16 02:31:35,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:35,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539214426] [2020-10-16 02:31:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:35,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539214426] [2020-10-16 02:31:35,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:35,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:35,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394987282] [2020-10-16 02:31:35,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:35,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:35,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:35,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:35,702 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 02:31:35,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states. [2020-10-16 02:31:35,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:35,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 02:31:35,703 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:35,767 INFO L129 PetriNetUnfolder]: 38/194 cut-off events. [2020-10-16 02:31:35,767 INFO L130 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2020-10-16 02:31:35,768 INFO L80 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 194 events. 38/194 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 756 event pairs, 12 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 361. Up to 89 conditions per place. [2020-10-16 02:31:35,770 INFO L132 encePairwiseOnDemand]: 144/151 looper letters, 8 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2020-10-16 02:31:35,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 156 flow [2020-10-16 02:31:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2020-10-16 02:31:35,773 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 02:31:35,773 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2020-10-16 02:31:35,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2020-10-16 02:31:35,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:35,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2020-10-16 02:31:35,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:35,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:35,777 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:35,778 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states and 348 transitions. [2020-10-16 02:31:35,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 156 flow [2020-10-16 02:31:35,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:35,781 INFO L241 Difference]: Finished difference. Result has 42 places, 35 transitions, 146 flow [2020-10-16 02:31:35,781 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2020-10-16 02:31:35,781 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2020-10-16 02:31:35,781 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 146 flow [2020-10-16 02:31:35,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:35,782 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:35,782 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:35,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 02:31:35,782 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash -582908876, now seen corresponding path program 1 times [2020-10-16 02:31:35,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:35,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289252959] [2020-10-16 02:31:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:35,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289252959] [2020-10-16 02:31:35,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312039804] [2020-10-16 02:31:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:35,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:35,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:35,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014356926] [2020-10-16 02:31:35,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:35,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:35,954 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 02:31:35,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 146 flow. Second operand 6 states. [2020-10-16 02:31:35,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:35,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 02:31:35,956 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:36,049 INFO L129 PetriNetUnfolder]: 37/189 cut-off events. [2020-10-16 02:31:36,050 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2020-10-16 02:31:36,050 INFO L80 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 189 events. 37/189 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 743 event pairs, 12 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 254. Up to 108 conditions per place. [2020-10-16 02:31:36,052 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 12 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2020-10-16 02:31:36,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 184 flow [2020-10-16 02:31:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2020-10-16 02:31:36,056 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5728476821192053 [2020-10-16 02:31:36,056 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2020-10-16 02:31:36,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2020-10-16 02:31:36,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:36,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2020-10-16 02:31:36,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:36,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:36,059 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:36,059 INFO L185 Difference]: Start difference. First operand has 42 places, 35 transitions, 146 flow. Second operand 4 states and 346 transitions. [2020-10-16 02:31:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 184 flow [2020-10-16 02:31:36,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:36,067 INFO L241 Difference]: Finished difference. Result has 45 places, 36 transitions, 161 flow [2020-10-16 02:31:36,067 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2020-10-16 02:31:36,067 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2020-10-16 02:31:36,067 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 161 flow [2020-10-16 02:31:36,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:36,068 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:36,068 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:36,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 02:31:36,282 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash -653450535, now seen corresponding path program 1 times [2020-10-16 02:31:36,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:36,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780876693] [2020-10-16 02:31:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:36,302 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:36,314 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:36,322 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:36,322 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:36,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 02:31:36,323 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:36,323 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:36,324 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-16 02:31:36,334 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,334 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,334 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,334 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,334 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,335 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,335 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,335 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,335 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,335 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,336 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,336 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,336 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,336 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,336 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,336 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,337 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,337 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,337 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,337 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,337 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,337 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,338 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,338 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,338 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,338 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,338 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,338 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,339 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,339 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,339 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,339 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,339 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,340 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,340 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,340 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,340 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,341 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,341 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,341 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,342 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,343 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,343 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,343 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,343 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,345 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,345 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,345 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,346 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,346 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,347 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,348 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,348 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,348 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,348 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,350 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,350 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,351 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,351 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,351 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:36,358 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:36,358 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:36,358 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:36,358 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:36,359 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:36,359 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:36,359 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:36,359 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:36,360 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 02:31:36,511 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-10-16 02:31:36,512 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 02:31:36,516 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1172 events. 189/1172 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6756 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-10-16 02:31:36,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 02:31:36,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:36,523 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:36,523 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:36,524 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:36,524 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:36,667 INFO L129 PetriNetUnfolder]: 157/948 cut-off events. [2020-10-16 02:31:36,667 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 02:31:36,671 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 948 events. 157/948 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4980 event pairs, 23 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 546. Up to 80 conditions per place. [2020-10-16 02:31:36,700 INFO L117 LiptonReduction]: Number of co-enabled transitions 2500 [2020-10-16 02:31:38,390 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 02:31:38,548 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:31:38,561 INFO L132 LiptonReduction]: Checked pairs total: 8810 [2020-10-16 02:31:38,562 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 02:31:38,562 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2039 [2020-10-16 02:31:38,564 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:38,564 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:38,564 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:38,564 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:38,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 27129011, now seen corresponding path program 1 times [2020-10-16 02:31:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:38,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987157125] [2020-10-16 02:31:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:38,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987157125] [2020-10-16 02:31:38,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:38,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:38,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057831750] [2020-10-16 02:31:38,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:38,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:38,594 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:38,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states. [2020-10-16 02:31:38,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:38,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:38,595 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:38,655 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2020-10-16 02:31:38,655 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 02:31:38,657 INFO L80 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 313 events. 85/313 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1219 event pairs, 23 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 312. Up to 175 conditions per place. [2020-10-16 02:31:38,659 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 9 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2020-10-16 02:31:38,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 160 flow [2020-10-16 02:31:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2020-10-16 02:31:38,661 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 02:31:38,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2020-10-16 02:31:38,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2020-10-16 02:31:38,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:38,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2020-10-16 02:31:38,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:38,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:38,664 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:38,665 INFO L185 Difference]: Start difference. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states and 294 transitions. [2020-10-16 02:31:38,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 160 flow [2020-10-16 02:31:38,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:38,668 INFO L241 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2020-10-16 02:31:38,668 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2020-10-16 02:31:38,668 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2020-10-16 02:31:38,668 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2020-10-16 02:31:38,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:38,669 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:38,669 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:38,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-16 02:31:38,669 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:38,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash -173965401, now seen corresponding path program 1 times [2020-10-16 02:31:38,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:38,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505934054] [2020-10-16 02:31:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:38,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505934054] [2020-10-16 02:31:38,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:38,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:38,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800303724] [2020-10-16 02:31:38,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:38,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:38,707 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:38,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states. [2020-10-16 02:31:38,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:38,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:38,708 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:38,786 INFO L129 PetriNetUnfolder]: 90/375 cut-off events. [2020-10-16 02:31:38,786 INFO L130 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2020-10-16 02:31:38,787 INFO L80 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 375 events. 90/375 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1698 event pairs, 33 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 707. Up to 175 conditions per place. [2020-10-16 02:31:38,790 INFO L132 encePairwiseOnDemand]: 151/158 looper letters, 8 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2020-10-16 02:31:38,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 182 flow [2020-10-16 02:31:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2020-10-16 02:31:38,793 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 02:31:38,794 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2020-10-16 02:31:38,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2020-10-16 02:31:38,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:38,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2020-10-16 02:31:38,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:38,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:38,797 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:38,797 INFO L185 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states and 392 transitions. [2020-10-16 02:31:38,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 182 flow [2020-10-16 02:31:38,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:38,800 INFO L241 Difference]: Finished difference. Result has 48 places, 40 transitions, 172 flow [2020-10-16 02:31:38,800 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2020-10-16 02:31:38,800 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2020-10-16 02:31:38,801 INFO L481 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 172 flow [2020-10-16 02:31:38,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:38,801 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:38,801 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:38,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-16 02:31:38,801 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1927840068, now seen corresponding path program 1 times [2020-10-16 02:31:38,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:38,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039859677] [2020-10-16 02:31:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039859677] [2020-10-16 02:31:38,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529408564] [2020-10-16 02:31:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:38,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:38,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:38,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74337916] [2020-10-16 02:31:38,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:38,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:38,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:38,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:38,946 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:38,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 172 flow. Second operand 6 states. [2020-10-16 02:31:38,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:38,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:38,947 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:39,025 INFO L129 PetriNetUnfolder]: 89/370 cut-off events. [2020-10-16 02:31:39,025 INFO L130 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2020-10-16 02:31:39,027 INFO L80 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 370 events. 89/370 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1693 event pairs, 33 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 491. Up to 212 conditions per place. [2020-10-16 02:31:39,029 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 12 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2020-10-16 02:31:39,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 210 flow [2020-10-16 02:31:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2020-10-16 02:31:39,032 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6170886075949367 [2020-10-16 02:31:39,032 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2020-10-16 02:31:39,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2020-10-16 02:31:39,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:39,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2020-10-16 02:31:39,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:39,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:39,036 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:39,036 INFO L185 Difference]: Start difference. First operand has 48 places, 40 transitions, 172 flow. Second operand 4 states and 390 transitions. [2020-10-16 02:31:39,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 210 flow [2020-10-16 02:31:39,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:39,039 INFO L241 Difference]: Finished difference. Result has 51 places, 41 transitions, 187 flow [2020-10-16 02:31:39,039 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2020-10-16 02:31:39,040 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2020-10-16 02:31:39,040 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 187 flow [2020-10-16 02:31:39,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:39,040 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:39,040 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:39,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 02:31:39,256 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash -890711517, now seen corresponding path program 1 times [2020-10-16 02:31:39,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:39,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741975410] [2020-10-16 02:31:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:39,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741975410] [2020-10-16 02:31:39,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347714720] [2020-10-16 02:31:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:39,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:31:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:39,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:39,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:31:39,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511066385] [2020-10-16 02:31:39,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:31:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:39,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:31:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:31:39,446 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:39,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 187 flow. Second operand 8 states. [2020-10-16 02:31:39,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:39,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:39,447 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:39,543 INFO L129 PetriNetUnfolder]: 87/362 cut-off events. [2020-10-16 02:31:39,543 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2020-10-16 02:31:39,545 INFO L80 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 362 events. 87/362 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1701 event pairs, 34 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 886. Up to 206 conditions per place. [2020-10-16 02:31:39,548 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 13 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2020-10-16 02:31:39,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 233 flow [2020-10-16 02:31:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2020-10-16 02:31:39,552 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6151898734177215 [2020-10-16 02:31:39,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2020-10-16 02:31:39,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2020-10-16 02:31:39,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:39,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2020-10-16 02:31:39,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:39,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:39,556 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:39,556 INFO L185 Difference]: Start difference. First operand has 51 places, 41 transitions, 187 flow. Second operand 5 states and 486 transitions. [2020-10-16 02:31:39,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 233 flow [2020-10-16 02:31:39,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 227 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:31:39,560 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 201 flow [2020-10-16 02:31:39,561 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 02:31:39,562 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2020-10-16 02:31:39,562 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 201 flow [2020-10-16 02:31:39,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:31:39,562 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:39,563 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:39,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 02:31:39,779 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:39,780 INFO L82 PathProgramCache]: Analyzing trace with hash 99472464, now seen corresponding path program 1 times [2020-10-16 02:31:39,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:39,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679391425] [2020-10-16 02:31:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:39,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:39,807 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:39,816 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:39,816 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:39,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-16 02:31:39,817 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:39,818 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:39,818 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-16 02:31:39,829 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,829 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,829 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,829 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,830 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,830 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,830 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,830 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,830 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,831 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,831 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,831 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,831 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,831 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,832 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,832 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,832 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,832 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,832 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,832 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,833 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,833 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,833 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,833 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,833 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,833 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,834 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,834 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,834 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,834 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,834 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,836 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,836 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,836 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,836 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,836 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,836 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,837 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,837 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,837 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,837 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,838 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,838 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,839 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,840 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,840 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,840 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,840 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,841 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,842 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,842 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,842 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,842 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,844 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,844 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,845 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,845 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,845 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,846 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,847 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,847 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,847 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,847 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,849 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,849 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,850 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,850 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,850 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:39,856 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:39,857 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:39,857 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:39,857 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:39,857 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:39,857 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:39,857 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:39,857 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:39,858 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:39,859 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 02:31:40,104 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-10-16 02:31:40,105 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 02:31:40,115 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2291 events. 399/2291 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 16193 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-10-16 02:31:40,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 02:31:40,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:40,125 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:40,125 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:40,125 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:40,125 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:40,308 INFO L129 PetriNetUnfolder]: 335/1843 cut-off events. [2020-10-16 02:31:40,308 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 02:31:40,317 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1843 events. 335/1843 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 12005 event pairs, 72 based on Foata normal form. 0/1572 useless extension candidates. Maximal degree in co-relation 1047. Up to 192 conditions per place. [2020-10-16 02:31:40,360 INFO L117 LiptonReduction]: Number of co-enabled transitions 3240 [2020-10-16 02:31:41,959 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-16 02:31:42,225 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 02:31:42,378 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:31:42,394 INFO L132 LiptonReduction]: Checked pairs total: 11418 [2020-10-16 02:31:42,394 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-16 02:31:42,394 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2269 [2020-10-16 02:31:42,396 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:42,396 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:42,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:42,396 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:42,397 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash 32517232, now seen corresponding path program 1 times [2020-10-16 02:31:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:42,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210480952] [2020-10-16 02:31:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:42,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210480952] [2020-10-16 02:31:42,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:42,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:42,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121980450] [2020-10-16 02:31:42,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:42,418 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:42,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states. [2020-10-16 02:31:42,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:42,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:42,418 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:42,514 INFO L129 PetriNetUnfolder]: 198/625 cut-off events. [2020-10-16 02:31:42,514 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 02:31:42,516 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 625 events. 198/625 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2984 event pairs, 72 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 603. Up to 338 conditions per place. [2020-10-16 02:31:42,520 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 9 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2020-10-16 02:31:42,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 188 flow [2020-10-16 02:31:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2020-10-16 02:31:42,523 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 02:31:42,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2020-10-16 02:31:42,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2020-10-16 02:31:42,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:42,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2020-10-16 02:31:42,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:42,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:42,525 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:42,525 INFO L185 Difference]: Start difference. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states and 321 transitions. [2020-10-16 02:31:42,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 188 flow [2020-10-16 02:31:42,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:42,528 INFO L241 Difference]: Finished difference. Result has 51 places, 43 transitions, 174 flow [2020-10-16 02:31:42,529 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2020-10-16 02:31:42,529 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2020-10-16 02:31:42,529 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 174 flow [2020-10-16 02:31:42,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:42,529 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:42,529 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:42,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 02:31:42,530 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1901913869, now seen corresponding path program 1 times [2020-10-16 02:31:42,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:42,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664831044] [2020-10-16 02:31:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:42,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664831044] [2020-10-16 02:31:42,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:42,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:42,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871152639] [2020-10-16 02:31:42,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:42,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:42,567 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:42,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states. [2020-10-16 02:31:42,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:42,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:42,568 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:42,685 INFO L129 PetriNetUnfolder]: 207/735 cut-off events. [2020-10-16 02:31:42,685 INFO L130 PetriNetUnfolder]: For 263/263 co-relation queries the response was YES. [2020-10-16 02:31:42,688 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 735 events. 207/735 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3946 event pairs, 87 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 1395. Up to 342 conditions per place. [2020-10-16 02:31:42,693 INFO L132 encePairwiseOnDemand]: 161/168 looper letters, 8 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2020-10-16 02:31:42,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 210 flow [2020-10-16 02:31:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2020-10-16 02:31:42,696 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 02:31:42,696 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2020-10-16 02:31:42,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2020-10-16 02:31:42,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:42,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2020-10-16 02:31:42,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:42,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:42,699 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:42,700 INFO L185 Difference]: Start difference. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states and 428 transitions. [2020-10-16 02:31:42,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 210 flow [2020-10-16 02:31:42,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:42,705 INFO L241 Difference]: Finished difference. Result has 54 places, 45 transitions, 200 flow [2020-10-16 02:31:42,705 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2020-10-16 02:31:42,706 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2020-10-16 02:31:42,706 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 200 flow [2020-10-16 02:31:42,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:42,706 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:42,706 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:42,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 02:31:42,707 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:42,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1796489895, now seen corresponding path program 1 times [2020-10-16 02:31:42,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:42,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468736937] [2020-10-16 02:31:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:42,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468736937] [2020-10-16 02:31:42,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640688531] [2020-10-16 02:31:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:42,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:42,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:42,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845061266] [2020-10-16 02:31:42,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:42,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:42,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:42,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:42,876 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:42,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 200 flow. Second operand 6 states. [2020-10-16 02:31:42,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:42,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:42,878 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:43,005 INFO L129 PetriNetUnfolder]: 206/730 cut-off events. [2020-10-16 02:31:43,006 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2020-10-16 02:31:43,010 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 730 events. 206/730 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3954 event pairs, 87 based on Foata normal form. 1/668 useless extension candidates. Maximal degree in co-relation 944. Up to 413 conditions per place. [2020-10-16 02:31:43,015 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 12 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2020-10-16 02:31:43,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 238 flow [2020-10-16 02:31:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2020-10-16 02:31:43,018 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2020-10-16 02:31:43,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2020-10-16 02:31:43,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2020-10-16 02:31:43,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:43,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2020-10-16 02:31:43,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:43,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:43,021 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:43,021 INFO L185 Difference]: Start difference. First operand has 54 places, 45 transitions, 200 flow. Second operand 4 states and 426 transitions. [2020-10-16 02:31:43,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 238 flow [2020-10-16 02:31:43,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:43,024 INFO L241 Difference]: Finished difference. Result has 57 places, 46 transitions, 215 flow [2020-10-16 02:31:43,024 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2020-10-16 02:31:43,025 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2020-10-16 02:31:43,025 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 215 flow [2020-10-16 02:31:43,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:43,025 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:43,026 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:43,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:43,242 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1936900963, now seen corresponding path program 1 times [2020-10-16 02:31:43,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:43,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170480273] [2020-10-16 02:31:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:43,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170480273] [2020-10-16 02:31:43,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736505504] [2020-10-16 02:31:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:31:43,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:43,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:43,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:31:43,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379010744] [2020-10-16 02:31:43,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:31:43,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:31:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:31:43,471 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:43,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 215 flow. Second operand 8 states. [2020-10-16 02:31:43,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:43,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:43,472 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:43,624 INFO L129 PetriNetUnfolder]: 204/722 cut-off events. [2020-10-16 02:31:43,625 INFO L130 PetriNetUnfolder]: For 359/359 co-relation queries the response was YES. [2020-10-16 02:31:43,627 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 722 events. 204/722 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3975 event pairs, 88 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 1780. Up to 407 conditions per place. [2020-10-16 02:31:43,632 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 13 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2020-10-16 02:31:43,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 261 flow [2020-10-16 02:31:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2020-10-16 02:31:43,635 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2020-10-16 02:31:43,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2020-10-16 02:31:43,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2020-10-16 02:31:43,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:43,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2020-10-16 02:31:43,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:43,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:43,639 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:43,639 INFO L185 Difference]: Start difference. First operand has 57 places, 46 transitions, 215 flow. Second operand 5 states and 531 transitions. [2020-10-16 02:31:43,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 261 flow [2020-10-16 02:31:43,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 255 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:31:43,643 INFO L241 Difference]: Finished difference. Result has 60 places, 47 transitions, 229 flow [2020-10-16 02:31:43,643 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2020-10-16 02:31:43,644 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2020-10-16 02:31:43,644 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 229 flow [2020-10-16 02:31:43,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:31:43,644 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:43,644 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:43,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 02:31:43,858 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:43,859 INFO L82 PathProgramCache]: Analyzing trace with hash 348671934, now seen corresponding path program 1 times [2020-10-16 02:31:43,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:43,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692335615] [2020-10-16 02:31:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:43,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692335615] [2020-10-16 02:31:43,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303919001] [2020-10-16 02:31:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:31:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:44,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:44,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:31:44,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097337867] [2020-10-16 02:31:44,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:31:44,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:44,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:31:44,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:31:44,048 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:44,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 229 flow. Second operand 10 states. [2020-10-16 02:31:44,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:44,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:44,049 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:44,188 INFO L129 PetriNetUnfolder]: 201/711 cut-off events. [2020-10-16 02:31:44,189 INFO L130 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2020-10-16 02:31:44,192 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 711 events. 201/711 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4003 event pairs, 92 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 1746. Up to 400 conditions per place. [2020-10-16 02:31:44,197 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 14 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2020-10-16 02:31:44,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 52 transitions, 283 flow [2020-10-16 02:31:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:31:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:31:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 636 transitions. [2020-10-16 02:31:44,200 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2020-10-16 02:31:44,201 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 636 transitions. [2020-10-16 02:31:44,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 636 transitions. [2020-10-16 02:31:44,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:44,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 636 transitions. [2020-10-16 02:31:44,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:31:44,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:31:44,205 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:31:44,205 INFO L185 Difference]: Start difference. First operand has 60 places, 47 transitions, 229 flow. Second operand 6 states and 636 transitions. [2020-10-16 02:31:44,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 52 transitions, 283 flow [2020-10-16 02:31:44,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 52 transitions, 273 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:31:44,209 INFO L241 Difference]: Finished difference. Result has 63 places, 48 transitions, 243 flow [2020-10-16 02:31:44,209 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2020-10-16 02:31:44,209 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2020-10-16 02:31:44,210 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 243 flow [2020-10-16 02:31:44,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:31:44,210 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:44,210 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:44,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:44,425 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:44,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1736436190, now seen corresponding path program 1 times [2020-10-16 02:31:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:44,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359182704] [2020-10-16 02:31:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:44,437 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:44,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:44,455 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:44,455 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:44,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-16 02:31:44,456 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:44,456 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:44,457 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-16 02:31:44,466 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,467 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,467 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,467 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,467 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,468 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,468 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,468 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,468 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,468 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,468 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,469 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,469 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,469 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,469 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,469 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,469 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,469 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,470 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,470 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,470 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,470 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,470 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,470 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,471 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,471 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,471 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,471 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,471 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,471 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,472 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,472 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,472 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,472 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,472 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,472 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,473 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,473 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,473 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,473 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,473 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,473 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,474 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,474 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,474 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,474 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,474 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,474 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,474 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,475 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,475 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,475 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,475 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,475 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,477 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,477 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,477 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,477 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,478 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,479 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,479 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,479 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,479 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,479 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,480 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,480 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,480 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,480 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,481 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,482 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,482 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,482 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,482 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,482 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,483 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,483 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,483 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,483 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,484 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,486 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,486 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,486 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,487 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,487 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:44,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:44,493 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:44,493 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:44,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:44,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:44,494 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:44,494 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:44,494 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:44,495 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 02:31:44,997 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-10-16 02:31:44,997 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 02:31:45,008 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4546 events. 849/4546 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 38654 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-10-16 02:31:45,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 02:31:45,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:45,025 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:45,026 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:45,026 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:45,026 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:45,380 INFO L129 PetriNetUnfolder]: 721/3650 cut-off events. [2020-10-16 02:31:45,380 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 02:31:45,403 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4148 conditions, 3650 events. 721/3650 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 29207 event pairs, 201 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 2061. Up to 448 conditions per place. [2020-10-16 02:31:45,503 INFO L117 LiptonReduction]: Number of co-enabled transitions 4060 [2020-10-16 02:31:46,752 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-16 02:31:47,079 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-16 02:31:47,341 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:47,420 INFO L132 LiptonReduction]: Checked pairs total: 18122 [2020-10-16 02:31:47,421 INFO L134 LiptonReduction]: Total number of compositions: 65 [2020-10-16 02:31:47,421 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2396 [2020-10-16 02:31:47,422 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:47,422 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:47,422 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:47,422 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:47,423 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:47,423 INFO L82 PathProgramCache]: Analyzing trace with hash 38211156, now seen corresponding path program 1 times [2020-10-16 02:31:47,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:47,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008473544] [2020-10-16 02:31:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:47,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008473544] [2020-10-16 02:31:47,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:47,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:47,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330851052] [2020-10-16 02:31:47,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:47,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:47,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:47,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:47,445 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:47,445 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states. [2020-10-16 02:31:47,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:47,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:47,445 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:47,603 INFO L129 PetriNetUnfolder]: 455/1273 cut-off events. [2020-10-16 02:31:47,604 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 02:31:47,610 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 1273 events. 455/1273 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7235 event pairs, 201 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 661 conditions per place. [2020-10-16 02:31:47,618 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 9 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2020-10-16 02:31:47,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 218 flow [2020-10-16 02:31:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2020-10-16 02:31:47,621 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 02:31:47,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2020-10-16 02:31:47,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2020-10-16 02:31:47,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:47,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2020-10-16 02:31:47,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:47,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:47,624 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:47,624 INFO L185 Difference]: Start difference. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states and 351 transitions. [2020-10-16 02:31:47,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 218 flow [2020-10-16 02:31:47,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:47,628 INFO L241 Difference]: Finished difference. Result has 57 places, 48 transitions, 204 flow [2020-10-16 02:31:47,628 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2020-10-16 02:31:47,628 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2020-10-16 02:31:47,628 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 204 flow [2020-10-16 02:31:47,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:47,628 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:47,629 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:47,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-16 02:31:47,629 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash 939052157, now seen corresponding path program 1 times [2020-10-16 02:31:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:47,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271700140] [2020-10-16 02:31:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271700140] [2020-10-16 02:31:47,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:47,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:47,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156839198] [2020-10-16 02:31:47,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:47,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:47,660 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:47,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states. [2020-10-16 02:31:47,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:47,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:47,661 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:47,813 INFO L129 PetriNetUnfolder]: 469/1466 cut-off events. [2020-10-16 02:31:47,813 INFO L130 PetriNetUnfolder]: For 553/553 co-relation queries the response was YES. [2020-10-16 02:31:47,817 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1466 events. 469/1466 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9098 event pairs, 222 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 2793. Up to 670 conditions per place. [2020-10-16 02:31:47,822 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 8 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2020-10-16 02:31:47,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 240 flow [2020-10-16 02:31:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:47,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2020-10-16 02:31:47,825 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 02:31:47,826 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2020-10-16 02:31:47,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2020-10-16 02:31:47,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:47,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2020-10-16 02:31:47,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:47,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:47,829 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:47,829 INFO L185 Difference]: Start difference. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states and 468 transitions. [2020-10-16 02:31:47,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 240 flow [2020-10-16 02:31:47,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:47,832 INFO L241 Difference]: Finished difference. Result has 60 places, 50 transitions, 230 flow [2020-10-16 02:31:47,833 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2020-10-16 02:31:47,833 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2020-10-16 02:31:47,833 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 230 flow [2020-10-16 02:31:47,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:47,833 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:47,833 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:47,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-16 02:31:47,834 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash 314298890, now seen corresponding path program 1 times [2020-10-16 02:31:47,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:47,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925223752] [2020-10-16 02:31:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:47,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925223752] [2020-10-16 02:31:47,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255195824] [2020-10-16 02:31:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:47,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:47,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:47,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876921441] [2020-10-16 02:31:47,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:47,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:47,976 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:47,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 230 flow. Second operand 6 states. [2020-10-16 02:31:47,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:47,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:47,978 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:48,263 INFO L129 PetriNetUnfolder]: 468/1461 cut-off events. [2020-10-16 02:31:48,263 INFO L130 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2020-10-16 02:31:48,269 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 1461 events. 468/1461 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9105 event pairs, 222 based on Foata normal form. 1/1335 useless extension candidates. Maximal degree in co-relation 1837. Up to 807 conditions per place. [2020-10-16 02:31:48,277 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 12 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2020-10-16 02:31:48,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 268 flow [2020-10-16 02:31:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2020-10-16 02:31:48,280 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6544943820224719 [2020-10-16 02:31:48,280 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2020-10-16 02:31:48,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2020-10-16 02:31:48,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:48,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2020-10-16 02:31:48,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:48,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:48,284 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:48,284 INFO L185 Difference]: Start difference. First operand has 60 places, 50 transitions, 230 flow. Second operand 4 states and 466 transitions. [2020-10-16 02:31:48,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 268 flow [2020-10-16 02:31:48,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:48,288 INFO L241 Difference]: Finished difference. Result has 63 places, 51 transitions, 245 flow [2020-10-16 02:31:48,288 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2020-10-16 02:31:48,288 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2020-10-16 02:31:48,289 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 245 flow [2020-10-16 02:31:48,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:48,289 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:48,289 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:48,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 02:31:48,503 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1701157806, now seen corresponding path program 1 times [2020-10-16 02:31:48,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:48,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647585250] [2020-10-16 02:31:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:48,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647585250] [2020-10-16 02:31:48,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433581870] [2020-10-16 02:31:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:48,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:31:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:48,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:48,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:31:48,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986672330] [2020-10-16 02:31:48,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:31:48,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:48,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:31:48,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:31:48,656 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:48,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 245 flow. Second operand 8 states. [2020-10-16 02:31:48,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:48,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:48,658 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:48,952 INFO L129 PetriNetUnfolder]: 466/1453 cut-off events. [2020-10-16 02:31:48,952 INFO L130 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2020-10-16 02:31:48,962 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1453 events. 466/1453 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9159 event pairs, 223 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 3578. Up to 801 conditions per place. [2020-10-16 02:31:48,978 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 13 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2020-10-16 02:31:48,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 291 flow [2020-10-16 02:31:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2020-10-16 02:31:48,983 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6528089887640449 [2020-10-16 02:31:48,983 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2020-10-16 02:31:48,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2020-10-16 02:31:48,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:48,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2020-10-16 02:31:48,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:48,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:48,989 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:48,989 INFO L185 Difference]: Start difference. First operand has 63 places, 51 transitions, 245 flow. Second operand 5 states and 581 transitions. [2020-10-16 02:31:48,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 291 flow [2020-10-16 02:31:48,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:31:48,996 INFO L241 Difference]: Finished difference. Result has 66 places, 52 transitions, 259 flow [2020-10-16 02:31:48,997 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2020-10-16 02:31:48,997 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2020-10-16 02:31:48,997 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 259 flow [2020-10-16 02:31:48,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:31:48,998 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:48,998 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:49,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 02:31:49,214 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash -223060935, now seen corresponding path program 1 times [2020-10-16 02:31:49,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:49,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338653033] [2020-10-16 02:31:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338653033] [2020-10-16 02:31:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614731993] [2020-10-16 02:31:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:49,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:31:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:49,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:49,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:31:49,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618549152] [2020-10-16 02:31:49,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:31:49,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:31:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:31:49,470 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:49,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 259 flow. Second operand 10 states. [2020-10-16 02:31:49,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:49,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:49,472 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:49,800 INFO L129 PetriNetUnfolder]: 463/1442 cut-off events. [2020-10-16 02:31:49,801 INFO L130 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2020-10-16 02:31:49,810 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 1442 events. 463/1442 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 9230 event pairs, 227 based on Foata normal form. 1/1316 useless extension candidates. Maximal degree in co-relation 3546. Up to 794 conditions per place. [2020-10-16 02:31:49,820 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 14 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2020-10-16 02:31:49,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 313 flow [2020-10-16 02:31:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:31:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:31:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 696 transitions. [2020-10-16 02:31:49,826 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2020-10-16 02:31:49,826 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 696 transitions. [2020-10-16 02:31:49,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 696 transitions. [2020-10-16 02:31:49,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:49,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 696 transitions. [2020-10-16 02:31:49,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:31:49,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:31:49,834 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:31:49,834 INFO L185 Difference]: Start difference. First operand has 66 places, 52 transitions, 259 flow. Second operand 6 states and 696 transitions. [2020-10-16 02:31:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 313 flow [2020-10-16 02:31:49,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 303 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:31:49,842 INFO L241 Difference]: Finished difference. Result has 69 places, 53 transitions, 273 flow [2020-10-16 02:31:49,843 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2020-10-16 02:31:49,843 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2020-10-16 02:31:49,843 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 273 flow [2020-10-16 02:31:49,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:31:49,843 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:49,844 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:50,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 02:31:50,057 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash 495964735, now seen corresponding path program 1 times [2020-10-16 02:31:50,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:50,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067182232] [2020-10-16 02:31:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:50,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067182232] [2020-10-16 02:31:50,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647427796] [2020-10-16 02:31:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:50,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:31:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:50,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:50,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:31:50,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32641107] [2020-10-16 02:31:50,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:31:50,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:50,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:31:50,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:31:50,375 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:50,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 273 flow. Second operand 12 states. [2020-10-16 02:31:50,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:50,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:50,378 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:50,739 INFO L129 PetriNetUnfolder]: 459/1428 cut-off events. [2020-10-16 02:31:50,740 INFO L130 PetriNetUnfolder]: For 740/740 co-relation queries the response was YES. [2020-10-16 02:31:50,748 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 1428 events. 459/1428 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9329 event pairs, 238 based on Foata normal form. 1/1302 useless extension candidates. Maximal degree in co-relation 3502. Up to 653 conditions per place. [2020-10-16 02:31:50,757 INFO L132 encePairwiseOnDemand]: 172/178 looper letters, 10 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2020-10-16 02:31:50,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 59 transitions, 335 flow [2020-10-16 02:31:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:31:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:31:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2020-10-16 02:31:50,845 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.648876404494382 [2020-10-16 02:31:50,845 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2020-10-16 02:31:50,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2020-10-16 02:31:50,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:50,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2020-10-16 02:31:50,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:31:50,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:31:50,853 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:31:50,853 INFO L185 Difference]: Start difference. First operand has 69 places, 53 transitions, 273 flow. Second operand 8 states and 924 transitions. [2020-10-16 02:31:50,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 59 transitions, 335 flow [2020-10-16 02:31:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 321 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:31:50,859 INFO L241 Difference]: Finished difference. Result has 74 places, 55 transitions, 306 flow [2020-10-16 02:31:50,859 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2020-10-16 02:31:50,859 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2020-10-16 02:31:50,860 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 306 flow [2020-10-16 02:31:50,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:31:50,860 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:50,860 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:51,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 02:31:51,075 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash 781378849, now seen corresponding path program 1 times [2020-10-16 02:31:51,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:51,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391313701] [2020-10-16 02:31:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:51,096 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:51,107 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:51,133 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:51,137 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:51,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-16 02:31:51,137 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:51,138 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:51,138 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-16 02:31:51,149 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,150 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,150 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,150 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,150 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,150 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,151 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,151 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,151 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,152 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,152 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,152 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,152 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,152 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,152 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,152 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,153 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,153 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,153 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,153 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,153 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,153 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,153 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,154 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,154 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,154 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,154 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,154 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,154 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,155 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,155 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,155 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,155 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,155 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,155 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,155 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,156 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,156 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,156 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,156 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,156 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,156 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,157 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,157 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,157 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,157 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,157 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,158 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,158 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,158 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,158 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,158 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,159 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,159 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,159 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,159 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,159 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,161 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,161 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,161 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,161 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,161 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,163 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,163 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,163 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,163 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,163 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,165 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,165 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,165 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,165 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,166 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,167 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,167 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,167 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,168 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,168 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,169 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,169 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,169 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,170 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,170 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,171 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,171 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,172 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,172 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,172 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,173 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,173 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,174 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,174 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,174 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:51,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:51,181 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:51,181 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:51,181 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:51,181 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:51,182 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:51,182 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:51,182 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:51,182 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:51,183 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 02:31:51,987 INFO L129 PetriNetUnfolder]: 1811/9105 cut-off events. [2020-10-16 02:31:51,987 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 02:31:52,047 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 9105 events. 1811/9105 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 89225 event pairs, 522 based on Foata normal form. 0/7550 useless extension candidates. Maximal degree in co-relation 5028. Up to 1024 conditions per place. [2020-10-16 02:31:52,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 02:31:52,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:52,078 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:52,078 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:52,079 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:52,079 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:52,741 INFO L129 PetriNetUnfolder]: 1555/7313 cut-off events. [2020-10-16 02:31:52,741 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 02:31:52,783 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8398 conditions, 7313 events. 1555/7313 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 67995 event pairs, 522 based on Foata normal form. 0/6270 useless extension candidates. Maximal degree in co-relation 4132. Up to 1024 conditions per place. [2020-10-16 02:31:52,920 INFO L117 LiptonReduction]: Number of co-enabled transitions 4960 [2020-10-16 02:31:54,792 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:54,872 INFO L132 LiptonReduction]: Checked pairs total: 20069 [2020-10-16 02:31:54,872 INFO L134 LiptonReduction]: Total number of compositions: 66 [2020-10-16 02:31:54,873 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2795 [2020-10-16 02:31:54,874 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:54,874 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:54,874 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:54,874 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:54,874 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:54,875 INFO L82 PathProgramCache]: Analyzing trace with hash 44152403, now seen corresponding path program 1 times [2020-10-16 02:31:54,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:54,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970371585] [2020-10-16 02:31:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:54,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970371585] [2020-10-16 02:31:54,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:54,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:54,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44621422] [2020-10-16 02:31:54,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:54,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:54,903 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:54,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states. [2020-10-16 02:31:54,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:54,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:54,904 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:55,300 INFO L129 PetriNetUnfolder]: 1032/2625 cut-off events. [2020-10-16 02:31:55,300 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 02:31:55,316 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 2625 events. 1032/2625 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17012 event pairs, 522 based on Foata normal form. 0/2105 useless extension candidates. Maximal degree in co-relation 2436. Up to 1304 conditions per place. [2020-10-16 02:31:55,334 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 9 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2020-10-16 02:31:55,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 250 flow [2020-10-16 02:31:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2020-10-16 02:31:55,337 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 02:31:55,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2020-10-16 02:31:55,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2020-10-16 02:31:55,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:55,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2020-10-16 02:31:55,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:55,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:55,341 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:55,341 INFO L185 Difference]: Start difference. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states and 372 transitions. [2020-10-16 02:31:55,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 250 flow [2020-10-16 02:31:55,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:55,346 INFO L241 Difference]: Finished difference. Result has 63 places, 53 transitions, 236 flow [2020-10-16 02:31:55,346 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2020-10-16 02:31:55,346 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2020-10-16 02:31:55,347 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 236 flow [2020-10-16 02:31:55,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:55,347 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:55,347 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:55,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-16 02:31:55,348 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1362338127, now seen corresponding path program 1 times [2020-10-16 02:31:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:55,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148219226] [2020-10-16 02:31:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:55,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148219226] [2020-10-16 02:31:55,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:55,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:55,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100444668] [2020-10-16 02:31:55,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:55,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:55,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:55,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:55,378 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:55,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states. [2020-10-16 02:31:55,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:55,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:55,379 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:55,781 INFO L129 PetriNetUnfolder]: 1052/2968 cut-off events. [2020-10-16 02:31:55,781 INFO L130 PetriNetUnfolder]: For 1172/1172 co-relation queries the response was YES. [2020-10-16 02:31:55,800 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5694 conditions, 2968 events. 1052/2968 cut-off events. For 1172/1172 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20909 event pairs, 550 based on Foata normal form. 0/2458 useless extension candidates. Maximal degree in co-relation 5669. Up to 1319 conditions per place. [2020-10-16 02:31:55,816 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 8 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2020-10-16 02:31:55,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 272 flow [2020-10-16 02:31:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 496 transitions. [2020-10-16 02:31:55,821 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 02:31:55,821 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 496 transitions. [2020-10-16 02:31:55,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 496 transitions. [2020-10-16 02:31:55,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:55,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 496 transitions. [2020-10-16 02:31:55,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:55,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:55,828 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:55,828 INFO L185 Difference]: Start difference. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states and 496 transitions. [2020-10-16 02:31:55,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 272 flow [2020-10-16 02:31:55,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:55,832 INFO L241 Difference]: Finished difference. Result has 66 places, 55 transitions, 262 flow [2020-10-16 02:31:55,832 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2020-10-16 02:31:55,832 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2020-10-16 02:31:55,833 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 262 flow [2020-10-16 02:31:55,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:55,833 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:55,833 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:55,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-16 02:31:55,833 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -355906383, now seen corresponding path program 1 times [2020-10-16 02:31:55,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:55,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676423802] [2020-10-16 02:31:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:55,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676423802] [2020-10-16 02:31:55,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112682146] [2020-10-16 02:31:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:55,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:55,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:55,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:55,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173285063] [2020-10-16 02:31:55,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:55,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:55,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:55,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:55,980 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:55,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 262 flow. Second operand 6 states. [2020-10-16 02:31:55,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:55,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:55,981 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:56,386 INFO L129 PetriNetUnfolder]: 1051/2963 cut-off events. [2020-10-16 02:31:56,387 INFO L130 PetriNetUnfolder]: For 1462/1462 co-relation queries the response was YES. [2020-10-16 02:31:56,397 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2963 events. 1051/2963 cut-off events. For 1462/1462 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20845 event pairs, 550 based on Foata normal form. 1/2709 useless extension candidates. Maximal degree in co-relation 3660. Up to 1586 conditions per place. [2020-10-16 02:31:56,413 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 12 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2020-10-16 02:31:56,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 300 flow [2020-10-16 02:31:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2020-10-16 02:31:56,415 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6639784946236559 [2020-10-16 02:31:56,415 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2020-10-16 02:31:56,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2020-10-16 02:31:56,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:56,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2020-10-16 02:31:56,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:56,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:56,419 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:56,419 INFO L185 Difference]: Start difference. First operand has 66 places, 55 transitions, 262 flow. Second operand 4 states and 494 transitions. [2020-10-16 02:31:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 300 flow [2020-10-16 02:31:56,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:56,423 INFO L241 Difference]: Finished difference. Result has 69 places, 56 transitions, 277 flow [2020-10-16 02:31:56,424 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2020-10-16 02:31:56,424 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2020-10-16 02:31:56,424 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 277 flow [2020-10-16 02:31:56,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:56,424 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:56,424 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:56,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 02:31:56,638 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1453614924, now seen corresponding path program 1 times [2020-10-16 02:31:56,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:56,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862621347] [2020-10-16 02:31:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:56,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862621347] [2020-10-16 02:31:56,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556788827] [2020-10-16 02:31:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:56,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:31:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:56,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:56,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:31:56,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35665350] [2020-10-16 02:31:56,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:31:56,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:31:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:31:56,837 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:56,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 277 flow. Second operand 8 states. [2020-10-16 02:31:56,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:56,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:56,838 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:57,142 INFO L129 PetriNetUnfolder]: 1049/2955 cut-off events. [2020-10-16 02:31:57,142 INFO L130 PetriNetUnfolder]: For 1479/1479 co-relation queries the response was YES. [2020-10-16 02:31:57,161 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7283 conditions, 2955 events. 1049/2955 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20949 event pairs, 551 based on Foata normal form. 1/2701 useless extension candidates. Maximal degree in co-relation 7240. Up to 1580 conditions per place. [2020-10-16 02:31:57,174 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 13 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2020-10-16 02:31:57,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 323 flow [2020-10-16 02:31:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2020-10-16 02:31:57,178 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6623655913978495 [2020-10-16 02:31:57,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2020-10-16 02:31:57,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2020-10-16 02:31:57,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:57,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2020-10-16 02:31:57,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:57,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:57,182 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:57,182 INFO L185 Difference]: Start difference. First operand has 69 places, 56 transitions, 277 flow. Second operand 5 states and 616 transitions. [2020-10-16 02:31:57,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 323 flow [2020-10-16 02:31:57,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 60 transitions, 317 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:31:57,189 INFO L241 Difference]: Finished difference. Result has 72 places, 57 transitions, 291 flow [2020-10-16 02:31:57,189 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2020-10-16 02:31:57,190 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2020-10-16 02:31:57,190 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 291 flow [2020-10-16 02:31:57,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:31:57,190 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:57,190 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:57,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:57,405 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1245149690, now seen corresponding path program 1 times [2020-10-16 02:31:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:57,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507513458] [2020-10-16 02:31:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:57,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507513458] [2020-10-16 02:31:57,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194195766] [2020-10-16 02:31:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:31:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:57,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:57,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:31:57,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654738170] [2020-10-16 02:31:57,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:31:57,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:57,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:31:57,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:31:57,608 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:57,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 291 flow. Second operand 10 states. [2020-10-16 02:31:57,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:57,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:57,609 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:57,941 INFO L129 PetriNetUnfolder]: 1046/2944 cut-off events. [2020-10-16 02:31:57,941 INFO L130 PetriNetUnfolder]: For 1493/1493 co-relation queries the response was YES. [2020-10-16 02:31:57,957 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 2944 events. 1046/2944 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 21011 event pairs, 555 based on Foata normal form. 1/2690 useless extension candidates. Maximal degree in co-relation 7210. Up to 1573 conditions per place. [2020-10-16 02:31:57,969 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 14 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2020-10-16 02:31:57,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 62 transitions, 345 flow [2020-10-16 02:31:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:31:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:31:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2020-10-16 02:31:57,971 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2020-10-16 02:31:57,971 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2020-10-16 02:31:57,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2020-10-16 02:31:57,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:57,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2020-10-16 02:31:57,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:31:57,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:31:57,976 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:31:57,976 INFO L185 Difference]: Start difference. First operand has 72 places, 57 transitions, 291 flow. Second operand 6 states and 738 transitions. [2020-10-16 02:31:57,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 62 transitions, 345 flow [2020-10-16 02:31:57,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 335 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:31:57,983 INFO L241 Difference]: Finished difference. Result has 75 places, 58 transitions, 305 flow [2020-10-16 02:31:57,983 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2020-10-16 02:31:57,984 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2020-10-16 02:31:57,984 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 305 flow [2020-10-16 02:31:57,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:31:57,984 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:57,984 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:58,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 02:31:58,198 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:58,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1295301725, now seen corresponding path program 1 times [2020-10-16 02:31:58,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:58,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648379952] [2020-10-16 02:31:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:58,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648379952] [2020-10-16 02:31:58,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056384461] [2020-10-16 02:31:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:31:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:58,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:58,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:31:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289614141] [2020-10-16 02:31:58,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:31:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:31:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:31:58,498 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:58,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 305 flow. Second operand 12 states. [2020-10-16 02:31:58,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:58,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:58,499 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:58,785 INFO L129 PetriNetUnfolder]: 1042/2930 cut-off events. [2020-10-16 02:31:58,785 INFO L130 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2020-10-16 02:31:58,796 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7242 conditions, 2930 events. 1042/2930 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21244 event pairs, 566 based on Foata normal form. 1/2676 useless extension candidates. Maximal degree in co-relation 7168. Up to 1302 conditions per place. [2020-10-16 02:31:58,804 INFO L132 encePairwiseOnDemand]: 180/186 looper letters, 10 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2020-10-16 02:31:58,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 64 transitions, 367 flow [2020-10-16 02:31:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:31:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:31:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 980 transitions. [2020-10-16 02:31:58,806 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6586021505376344 [2020-10-16 02:31:58,806 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 980 transitions. [2020-10-16 02:31:58,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 980 transitions. [2020-10-16 02:31:58,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:58,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 980 transitions. [2020-10-16 02:31:58,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:31:58,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:31:58,811 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:31:58,811 INFO L185 Difference]: Start difference. First operand has 75 places, 58 transitions, 305 flow. Second operand 8 states and 980 transitions. [2020-10-16 02:31:58,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 64 transitions, 367 flow [2020-10-16 02:31:58,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 353 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:31:58,816 INFO L241 Difference]: Finished difference. Result has 80 places, 60 transitions, 338 flow [2020-10-16 02:31:58,817 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2020-10-16 02:31:58,817 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2020-10-16 02:31:58,817 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 338 flow [2020-10-16 02:31:58,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:31:58,817 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:58,817 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:59,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:59,031 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:59,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:59,031 INFO L82 PathProgramCache]: Analyzing trace with hash -703139369, now seen corresponding path program 1 times [2020-10-16 02:31:59,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:59,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995570783] [2020-10-16 02:31:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:31:59,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995570783] [2020-10-16 02:31:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533050210] [2020-10-16 02:31:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:59,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:59,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:31:59,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:59,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 02:31:59,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749215632] [2020-10-16 02:31:59,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:31:59,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:59,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:31:59,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:31:59,194 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:59,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 338 flow. Second operand 7 states. [2020-10-16 02:31:59,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:59,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:59,195 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:59,530 INFO L129 PetriNetUnfolder]: 1108/3347 cut-off events. [2020-10-16 02:31:59,530 INFO L130 PetriNetUnfolder]: For 3282/3282 co-relation queries the response was YES. [2020-10-16 02:31:59,547 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9178 conditions, 3347 events. 1108/3347 cut-off events. For 3282/3282 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 26330 event pairs, 658 based on Foata normal form. 26/3126 useless extension candidates. Maximal degree in co-relation 4638. Up to 1309 conditions per place. [2020-10-16 02:31:59,557 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 14 selfloop transitions, 9 changer transitions 0/66 dead transitions. [2020-10-16 02:31:59,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 66 transitions, 413 flow [2020-10-16 02:31:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 621 transitions. [2020-10-16 02:31:59,558 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.667741935483871 [2020-10-16 02:31:59,558 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 621 transitions. [2020-10-16 02:31:59,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 621 transitions. [2020-10-16 02:31:59,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:59,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 621 transitions. [2020-10-16 02:31:59,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:59,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:59,562 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:59,562 INFO L185 Difference]: Start difference. First operand has 80 places, 60 transitions, 338 flow. Second operand 5 states and 621 transitions. [2020-10-16 02:31:59,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 66 transitions, 413 flow [2020-10-16 02:31:59,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 66 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 02:31:59,573 INFO L241 Difference]: Finished difference. Result has 81 places, 62 transitions, 355 flow [2020-10-16 02:31:59,573 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2020-10-16 02:31:59,574 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2020-10-16 02:31:59,574 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 355 flow [2020-10-16 02:31:59,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:31:59,574 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:59,574 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:59,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 02:31:59,788 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:59,788 INFO L82 PathProgramCache]: Analyzing trace with hash -436182876, now seen corresponding path program 1 times [2020-10-16 02:31:59,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:59,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442890261] [2020-10-16 02:31:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:59,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:59,809 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:59,818 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:59,818 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:59,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-16 02:31:59,818 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:59,819 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:59,819 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-16 02:31:59,830 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,830 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,830 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,830 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,831 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,831 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,831 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,831 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,831 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,831 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,831 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,832 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,832 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,832 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,832 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,832 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,832 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,833 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,833 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,833 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,833 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,833 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,833 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,833 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,834 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,834 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,834 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,834 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,834 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,834 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,834 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,835 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,835 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,835 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,836 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,837 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,837 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,837 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,837 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,837 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,837 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,838 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,839 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,839 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,839 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,839 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,839 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,840 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,840 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,840 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,840 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,841 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,841 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,842 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,842 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,842 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,843 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,844 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,844 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,844 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,844 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,845 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,845 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,845 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,845 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,846 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,847 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,847 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,847 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,847 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,847 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,848 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,848 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,848 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,849 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,849 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,850 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,850 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,850 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,850 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,850 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,851 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,851 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,851 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,851 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,851 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,852 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,852 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,853 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,853 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,853 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:59,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:59,859 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:59,859 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:59,859 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:59,859 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:59,859 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:59,859 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:59,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:59,859 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:59,861 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 02:32:02,860 INFO L129 PetriNetUnfolder]: 3861/18336 cut-off events. [2020-10-16 02:32:02,860 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 02:32:02,952 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20713 conditions, 18336 events. 3861/18336 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 205615 event pairs, 1291 based on Foata normal form. 0/15243 useless extension candidates. Maximal degree in co-relation 10172. Up to 2304 conditions per place. [2020-10-16 02:32:02,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 02:32:02,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:02,989 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:32:02,989 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:02,989 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:02,989 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:04,584 INFO L129 PetriNetUnfolder]: 3349/14752 cut-off events. [2020-10-16 02:32:04,585 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 02:32:04,641 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17129 conditions, 14752 events. 3349/14752 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 156456 event pairs, 1291 based on Foata normal form. 0/12683 useless extension candidates. Maximal degree in co-relation 8380. Up to 2304 conditions per place. [2020-10-16 02:32:04,883 INFO L117 LiptonReduction]: Number of co-enabled transitions 5940 [2020-10-16 02:32:06,601 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 02:32:06,753 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:32:06,793 INFO L132 LiptonReduction]: Checked pairs total: 28628 [2020-10-16 02:32:06,793 INFO L134 LiptonReduction]: Total number of compositions: 71 [2020-10-16 02:32:06,794 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3805 [2020-10-16 02:32:06,795 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:32:06,795 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:32:06,795 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:06,795 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:32:06,796 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash 50460177, now seen corresponding path program 1 times [2020-10-16 02:32:06,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:06,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590931640] [2020-10-16 02:32:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:06,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590931640] [2020-10-16 02:32:06,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:06,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:32:06,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674393015] [2020-10-16 02:32:06,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:32:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:32:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:32:06,815 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:06,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states. [2020-10-16 02:32:06,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:06,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:06,815 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:07,360 INFO L129 PetriNetUnfolder]: 2313/5449 cut-off events. [2020-10-16 02:32:07,360 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 02:32:07,387 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10415 conditions, 5449 events. 2313/5449 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 39806 event pairs, 1291 based on Foata normal form. 0/4416 useless extension candidates. Maximal degree in co-relation 5018. Up to 2587 conditions per place. [2020-10-16 02:32:07,406 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 9 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2020-10-16 02:32:07,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 284 flow [2020-10-16 02:32:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:32:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:32:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2020-10-16 02:32:07,408 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 02:32:07,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2020-10-16 02:32:07,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2020-10-16 02:32:07,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:07,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2020-10-16 02:32:07,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:32:07,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:32:07,411 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:32:07,411 INFO L185 Difference]: Start difference. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states and 402 transitions. [2020-10-16 02:32:07,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 284 flow [2020-10-16 02:32:07,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:32:07,417 INFO L241 Difference]: Finished difference. Result has 69 places, 58 transitions, 270 flow [2020-10-16 02:32:07,417 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2020-10-16 02:32:07,417 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2020-10-16 02:32:07,418 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 270 flow [2020-10-16 02:32:07,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:32:07,418 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:07,418 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:07,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-16 02:32:07,418 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:07,419 INFO L82 PathProgramCache]: Analyzing trace with hash -93476314, now seen corresponding path program 1 times [2020-10-16 02:32:07,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:07,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740031124] [2020-10-16 02:32:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:32:07,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740031124] [2020-10-16 02:32:07,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:07,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:32:07,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548603244] [2020-10-16 02:32:07,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:32:07,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:32:07,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:32:07,456 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:07,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states. [2020-10-16 02:32:07,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:07,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:07,457 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:08,160 INFO L129 PetriNetUnfolder]: 2340/6073 cut-off events. [2020-10-16 02:32:08,160 INFO L130 PetriNetUnfolder]: For 2505/2505 co-relation queries the response was YES. [2020-10-16 02:32:08,185 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11649 conditions, 6073 events. 2340/6073 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47741 event pairs, 1327 based on Foata normal form. 0/5051 useless extension candidates. Maximal degree in co-relation 11623. Up to 2609 conditions per place. [2020-10-16 02:32:08,203 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 8 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2020-10-16 02:32:08,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 306 flow [2020-10-16 02:32:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2020-10-16 02:32:08,205 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 02:32:08,205 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2020-10-16 02:32:08,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2020-10-16 02:32:08,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:08,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2020-10-16 02:32:08,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:08,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:08,208 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:08,208 INFO L185 Difference]: Start difference. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states and 536 transitions. [2020-10-16 02:32:08,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 306 flow [2020-10-16 02:32:08,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:08,212 INFO L241 Difference]: Finished difference. Result has 72 places, 60 transitions, 296 flow [2020-10-16 02:32:08,213 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2020-10-16 02:32:08,213 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2020-10-16 02:32:08,213 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 296 flow [2020-10-16 02:32:08,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:32:08,213 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:08,213 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:08,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-16 02:32:08,214 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash 637668557, now seen corresponding path program 1 times [2020-10-16 02:32:08,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:08,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517422491] [2020-10-16 02:32:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517422491] [2020-10-16 02:32:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177989273] [2020-10-16 02:32:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:08,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:08,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:08,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:32:08,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115693154] [2020-10-16 02:32:08,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:32:08,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:08,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:32:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:32:08,359 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:08,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 296 flow. Second operand 6 states. [2020-10-16 02:32:08,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:08,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:08,360 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:08,941 INFO L129 PetriNetUnfolder]: 2339/6068 cut-off events. [2020-10-16 02:32:08,941 INFO L130 PetriNetUnfolder]: For 3060/3060 co-relation queries the response was YES. [2020-10-16 02:32:08,981 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14795 conditions, 6068 events. 2339/6068 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47628 event pairs, 1327 based on Foata normal form. 1/5558 useless extension candidates. Maximal degree in co-relation 7510. Up to 3134 conditions per place. [2020-10-16 02:32:09,005 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 12 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2020-10-16 02:32:09,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 334 flow [2020-10-16 02:32:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2020-10-16 02:32:09,006 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2020-10-16 02:32:09,006 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2020-10-16 02:32:09,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2020-10-16 02:32:09,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:09,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2020-10-16 02:32:09,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:09,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:09,008 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:09,008 INFO L185 Difference]: Start difference. First operand has 72 places, 60 transitions, 296 flow. Second operand 4 states and 534 transitions. [2020-10-16 02:32:09,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 334 flow [2020-10-16 02:32:09,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:09,015 INFO L241 Difference]: Finished difference. Result has 75 places, 61 transitions, 311 flow [2020-10-16 02:32:09,015 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2020-10-16 02:32:09,015 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2020-10-16 02:32:09,015 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 311 flow [2020-10-16 02:32:09,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:32:09,016 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:09,016 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:09,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:09,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:09,230 INFO L82 PathProgramCache]: Analyzing trace with hash -400747775, now seen corresponding path program 1 times [2020-10-16 02:32:09,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:09,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711076808] [2020-10-16 02:32:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:09,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711076808] [2020-10-16 02:32:09,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554787001] [2020-10-16 02:32:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:09,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:32:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:09,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:09,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:32:09,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150424112] [2020-10-16 02:32:09,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:32:09,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:32:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:32:09,406 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:09,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 311 flow. Second operand 8 states. [2020-10-16 02:32:09,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:09,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:09,407 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:10,175 INFO L129 PetriNetUnfolder]: 2337/6060 cut-off events. [2020-10-16 02:32:10,175 INFO L130 PetriNetUnfolder]: For 3079/3079 co-relation queries the response was YES. [2020-10-16 02:32:10,200 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14794 conditions, 6060 events. 2337/6060 cut-off events. For 3079/3079 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47598 event pairs, 1328 based on Foata normal form. 1/5550 useless extension candidates. Maximal degree in co-relation 14750. Up to 3128 conditions per place. [2020-10-16 02:32:10,220 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 13 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2020-10-16 02:32:10,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 357 flow [2020-10-16 02:32:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2020-10-16 02:32:10,221 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2020-10-16 02:32:10,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 666 transitions. [2020-10-16 02:32:10,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 666 transitions. [2020-10-16 02:32:10,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:10,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 666 transitions. [2020-10-16 02:32:10,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:10,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:10,223 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:10,224 INFO L185 Difference]: Start difference. First operand has 75 places, 61 transitions, 311 flow. Second operand 5 states and 666 transitions. [2020-10-16 02:32:10,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 357 flow [2020-10-16 02:32:10,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 351 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:32:10,229 INFO L241 Difference]: Finished difference. Result has 78 places, 62 transitions, 325 flow [2020-10-16 02:32:10,229 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2020-10-16 02:32:10,229 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-16 02:32:10,229 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 325 flow [2020-10-16 02:32:10,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:32:10,229 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:10,229 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:10,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 02:32:10,436 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash 475549348, now seen corresponding path program 1 times [2020-10-16 02:32:10,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:10,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511462825] [2020-10-16 02:32:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:10,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511462825] [2020-10-16 02:32:10,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293691409] [2020-10-16 02:32:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:32:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:10,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:10,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:32:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90705236] [2020-10-16 02:32:10,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:32:10,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:32:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:32:10,624 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:10,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 325 flow. Second operand 10 states. [2020-10-16 02:32:10,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:10,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:10,628 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:11,265 INFO L129 PetriNetUnfolder]: 2334/6049 cut-off events. [2020-10-16 02:32:11,265 INFO L130 PetriNetUnfolder]: For 3096/3096 co-relation queries the response was YES. [2020-10-16 02:32:11,316 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14781 conditions, 6049 events. 2334/6049 cut-off events. For 3096/3096 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47816 event pairs, 1332 based on Foata normal form. 1/5539 useless extension candidates. Maximal degree in co-relation 14722. Up to 3121 conditions per place. [2020-10-16 02:32:11,338 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 14 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2020-10-16 02:32:11,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 379 flow [2020-10-16 02:32:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:32:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:32:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2020-10-16 02:32:11,340 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2020-10-16 02:32:11,340 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2020-10-16 02:32:11,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2020-10-16 02:32:11,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:11,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2020-10-16 02:32:11,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:32:11,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:32:11,342 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:32:11,342 INFO L185 Difference]: Start difference. First operand has 78 places, 62 transitions, 325 flow. Second operand 6 states and 798 transitions. [2020-10-16 02:32:11,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 379 flow [2020-10-16 02:32:11,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 369 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:32:11,348 INFO L241 Difference]: Finished difference. Result has 81 places, 63 transitions, 339 flow [2020-10-16 02:32:11,349 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2020-10-16 02:32:11,349 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2020-10-16 02:32:11,349 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 339 flow [2020-10-16 02:32:11,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:32:11,349 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:11,349 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:11,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-16 02:32:11,550 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash 873129670, now seen corresponding path program 1 times [2020-10-16 02:32:11,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:11,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074934727] [2020-10-16 02:32:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:11,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074934727] [2020-10-16 02:32:11,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904299331] [2020-10-16 02:32:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:11,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:32:11,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:11,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:11,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:32:11,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785969631] [2020-10-16 02:32:11,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:32:11,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:11,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:32:11,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:32:11,861 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:11,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 339 flow. Second operand 12 states. [2020-10-16 02:32:11,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:11,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:11,863 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:12,622 INFO L129 PetriNetUnfolder]: 2330/6035 cut-off events. [2020-10-16 02:32:12,622 INFO L130 PetriNetUnfolder]: For 3111/3111 co-relation queries the response was YES. [2020-10-16 02:32:12,669 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14757 conditions, 6035 events. 2330/6035 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 48189 event pairs, 1343 based on Foata normal form. 1/5525 useless extension candidates. Maximal degree in co-relation 14682. Up to 2592 conditions per place. [2020-10-16 02:32:12,691 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 10 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2020-10-16 02:32:12,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 401 flow [2020-10-16 02:32:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:32:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:32:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1060 transitions. [2020-10-16 02:32:12,875 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6691919191919192 [2020-10-16 02:32:12,875 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1060 transitions. [2020-10-16 02:32:12,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1060 transitions. [2020-10-16 02:32:12,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:12,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1060 transitions. [2020-10-16 02:32:12,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:32:12,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:32:12,878 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:32:12,878 INFO L185 Difference]: Start difference. First operand has 81 places, 63 transitions, 339 flow. Second operand 8 states and 1060 transitions. [2020-10-16 02:32:12,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 401 flow [2020-10-16 02:32:12,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 387 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:12,883 INFO L241 Difference]: Finished difference. Result has 86 places, 65 transitions, 372 flow [2020-10-16 02:32:12,883 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=372, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2020-10-16 02:32:12,884 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 20 predicate places. [2020-10-16 02:32:12,884 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 372 flow [2020-10-16 02:32:12,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:32:12,884 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:12,884 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:13,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:13,085 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash 921562965, now seen corresponding path program 1 times [2020-10-16 02:32:13,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:13,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825495814] [2020-10-16 02:32:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:13,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825495814] [2020-10-16 02:32:13,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47256908] [2020-10-16 02:32:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:13,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:13,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 02:32:13,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156562021] [2020-10-16 02:32:13,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:32:13,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:13,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:32:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:32:13,303 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:13,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 372 flow. Second operand 7 states. [2020-10-16 02:32:13,305 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:13,305 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:13,305 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:14,203 INFO L129 PetriNetUnfolder]: 2443/6823 cut-off events. [2020-10-16 02:32:14,204 INFO L130 PetriNetUnfolder]: For 6446/6446 co-relation queries the response was YES. [2020-10-16 02:32:14,252 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18511 conditions, 6823 events. 2443/6823 cut-off events. For 6446/6446 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 58647 event pairs, 1491 based on Foata normal form. 35/6356 useless extension candidates. Maximal degree in co-relation 9324. Up to 2621 conditions per place. [2020-10-16 02:32:14,278 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 14 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2020-10-16 02:32:14,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 71 transitions, 447 flow [2020-10-16 02:32:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2020-10-16 02:32:14,279 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2020-10-16 02:32:14,279 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2020-10-16 02:32:14,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2020-10-16 02:32:14,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:14,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2020-10-16 02:32:14,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:14,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:14,281 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:14,281 INFO L185 Difference]: Start difference. First operand has 86 places, 65 transitions, 372 flow. Second operand 5 states and 671 transitions. [2020-10-16 02:32:14,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 71 transitions, 447 flow [2020-10-16 02:32:14,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 71 transitions, 423 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:14,298 INFO L241 Difference]: Finished difference. Result has 87 places, 67 transitions, 389 flow [2020-10-16 02:32:14,299 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2020-10-16 02:32:14,299 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 21 predicate places. [2020-10-16 02:32:14,299 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 389 flow [2020-10-16 02:32:14,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:32:14,300 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:14,300 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:14,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 02:32:14,501 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2001719838, now seen corresponding path program 1 times [2020-10-16 02:32:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:14,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726987339] [2020-10-16 02:32:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:32:14,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:32:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:32:14,539 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:32:14,550 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:32:14,551 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:32:14,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-16 02:32:14,554 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:32:14,556 WARN L371 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:32:14,558 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2020-10-16 02:32:14,575 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,575 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,575 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,576 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,576 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,577 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,577 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,578 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,578 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,579 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,580 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,580 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,581 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,588 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,588 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,588 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,588 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,589 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,589 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,589 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,589 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,589 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,590 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,590 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,590 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,590 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,590 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,591 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,591 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,591 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,591 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,591 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,591 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,591 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,592 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,592 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,592 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,592 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,593 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,593 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,593 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,593 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,596 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,597 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,597 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,597 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,597 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,601 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,602 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,602 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,602 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,602 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,603 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,604 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,604 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,604 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,604 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,606 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,606 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,606 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,607 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,607 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,608 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,609 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,609 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,609 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,609 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,611 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,612 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,612 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,612 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,612 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,614 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,614 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,614 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,614 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,614 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,616 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,616 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,616 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,616 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,616 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,618 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,618 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,618 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,619 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,619 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:14,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:32:14,626 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:32:14,626 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:32:14,626 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:32:14,626 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:32:14,626 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:32:14,626 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:32:14,626 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:32:14,626 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:32:14,628 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 02:32:22,166 INFO L129 PetriNetUnfolder]: 8215/37039 cut-off events. [2020-10-16 02:32:22,166 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 02:32:22,485 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42245 conditions, 37039 events. 8215/37039 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 468035 event pairs, 3084 based on Foata normal form. 0/30872 useless extension candidates. Maximal degree in co-relation 20694. Up to 5120 conditions per place. [2020-10-16 02:32:22,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 02:32:22,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:22,579 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:32:22,579 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:22,579 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:22,579 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:26,274 INFO L129 PetriNetUnfolder]: 7191/29871 cut-off events. [2020-10-16 02:32:26,274 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 02:32:26,517 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35077 conditions, 29871 events. 7191/29871 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 356661 event pairs, 3084 based on Foata normal form. 0/25752 useless extension candidates. Maximal degree in co-relation 17110. Up to 5120 conditions per place. [2020-10-16 02:32:27,280 INFO L117 LiptonReduction]: Number of co-enabled transitions 7000 [2020-10-16 02:32:29,549 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-16 02:32:29,798 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-16 02:32:29,884 INFO L132 LiptonReduction]: Checked pairs total: 33303 [2020-10-16 02:32:29,885 INFO L134 LiptonReduction]: Total number of compositions: 69 [2020-10-16 02:32:29,885 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 7306 [2020-10-16 02:32:29,886 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:32:29,887 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:32:29,887 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:29,887 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:32:29,887 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:29,887 INFO L82 PathProgramCache]: Analyzing trace with hash 56928945, now seen corresponding path program 1 times [2020-10-16 02:32:29,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:29,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101983192] [2020-10-16 02:32:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:29,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101983192] [2020-10-16 02:32:29,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:29,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:32:29,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391809138] [2020-10-16 02:32:29,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:32:29,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:32:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:32:29,908 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:29,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states. [2020-10-16 02:32:29,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:29,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:29,909 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:31,262 INFO L129 PetriNetUnfolder]: 5130/11345 cut-off events. [2020-10-16 02:32:31,262 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 02:32:31,325 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21703 conditions, 11345 events. 5130/11345 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 91343 event pairs, 3084 based on Foata normal form. 0/9287 useless extension candidates. Maximal degree in co-relation 10417. Up to 5150 conditions per place. [2020-10-16 02:32:31,369 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 9 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2020-10-16 02:32:31,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 320 flow [2020-10-16 02:32:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:32:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:32:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2020-10-16 02:32:31,371 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 02:32:31,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2020-10-16 02:32:31,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2020-10-16 02:32:31,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:31,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2020-10-16 02:32:31,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:32:31,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:32:31,373 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:32:31,373 INFO L185 Difference]: Start difference. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states and 426 transitions. [2020-10-16 02:32:31,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 320 flow [2020-10-16 02:32:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:32:31,379 INFO L241 Difference]: Finished difference. Result has 75 places, 63 transitions, 306 flow [2020-10-16 02:32:31,380 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2020-10-16 02:32:31,380 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2020-10-16 02:32:31,380 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 306 flow [2020-10-16 02:32:31,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:32:31,380 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:31,380 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:31,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-16 02:32:31,380 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash 277330913, now seen corresponding path program 1 times [2020-10-16 02:32:31,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:31,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374631556] [2020-10-16 02:32:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:32:31,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374631556] [2020-10-16 02:32:31,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:31,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:32:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58582235] [2020-10-16 02:32:31,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:32:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:32:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:32:31,405 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:31,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states. [2020-10-16 02:32:31,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:31,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:31,406 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:32,618 INFO L129 PetriNetUnfolder]: 5165/12509 cut-off events. [2020-10-16 02:32:32,619 INFO L130 PetriNetUnfolder]: For 5385/5385 co-relation queries the response was YES. [2020-10-16 02:32:32,718 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24010 conditions, 12509 events. 5165/12509 cut-off events. For 5385/5385 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108501 event pairs, 3129 based on Foata normal form. 0/10463 useless extension candidates. Maximal degree in co-relation 23983. Up to 5180 conditions per place. [2020-10-16 02:32:32,771 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 8 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2020-10-16 02:32:32,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 342 flow [2020-10-16 02:32:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2020-10-16 02:32:32,773 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 02:32:32,773 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2020-10-16 02:32:32,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2020-10-16 02:32:32,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:32,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2020-10-16 02:32:32,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:32,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:32,775 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:32,775 INFO L185 Difference]: Start difference. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states and 568 transitions. [2020-10-16 02:32:32,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 342 flow [2020-10-16 02:32:32,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:32,786 INFO L241 Difference]: Finished difference. Result has 78 places, 65 transitions, 332 flow [2020-10-16 02:32:32,786 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2020-10-16 02:32:32,787 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2020-10-16 02:32:32,787 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 332 flow [2020-10-16 02:32:32,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:32:32,787 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:32,787 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:32,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-16 02:32:32,787 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:32,788 INFO L82 PathProgramCache]: Analyzing trace with hash -190386445, now seen corresponding path program 1 times [2020-10-16 02:32:32,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:32,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664640609] [2020-10-16 02:32:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:32,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664640609] [2020-10-16 02:32:32,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019156759] [2020-10-16 02:32:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:32,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:32,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:32:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132174207] [2020-10-16 02:32:32,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:32:32,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:32:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:32:32,962 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:32,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 332 flow. Second operand 6 states. [2020-10-16 02:32:32,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:32,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:32,964 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:34,598 INFO L129 PetriNetUnfolder]: 5164/12504 cut-off events. [2020-10-16 02:32:34,598 INFO L130 PetriNetUnfolder]: For 6462/6462 co-relation queries the response was YES. [2020-10-16 02:32:34,680 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 12504 events. 5164/12504 cut-off events. For 6462/6462 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108070 event pairs, 3129 based on Foata normal form. 1/11482 useless extension candidates. Maximal degree in co-relation 15456. Up to 6219 conditions per place. [2020-10-16 02:32:34,731 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 12 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2020-10-16 02:32:34,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 68 transitions, 370 flow [2020-10-16 02:32:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2020-10-16 02:32:34,732 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6970443349753694 [2020-10-16 02:32:34,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2020-10-16 02:32:34,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2020-10-16 02:32:34,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:34,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2020-10-16 02:32:34,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:34,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:34,734 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:34,734 INFO L185 Difference]: Start difference. First operand has 78 places, 65 transitions, 332 flow. Second operand 4 states and 566 transitions. [2020-10-16 02:32:34,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 68 transitions, 370 flow [2020-10-16 02:32:34,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:34,741 INFO L241 Difference]: Finished difference. Result has 81 places, 66 transitions, 347 flow [2020-10-16 02:32:34,741 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2020-10-16 02:32:34,741 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2020-10-16 02:32:34,741 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 347 flow [2020-10-16 02:32:34,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:32:34,741 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:34,741 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:34,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 02:32:34,942 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:34,943 INFO L82 PathProgramCache]: Analyzing trace with hash 495797898, now seen corresponding path program 1 times [2020-10-16 02:32:34,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:34,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218038744] [2020-10-16 02:32:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:34,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218038744] [2020-10-16 02:32:34,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100714339] [2020-10-16 02:32:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:32:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:35,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:35,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:32:35,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730641568] [2020-10-16 02:32:35,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:32:35,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:32:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:32:35,111 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:35,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 347 flow. Second operand 8 states. [2020-10-16 02:32:35,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:35,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:35,112 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:36,522 INFO L129 PetriNetUnfolder]: 5162/12496 cut-off events. [2020-10-16 02:32:36,522 INFO L130 PetriNetUnfolder]: For 6483/6483 co-relation queries the response was YES. [2020-10-16 02:32:36,662 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30249 conditions, 12496 events. 5162/12496 cut-off events. For 6483/6483 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108143 event pairs, 3130 based on Foata normal form. 1/11474 useless extension candidates. Maximal degree in co-relation 30204. Up to 6213 conditions per place. [2020-10-16 02:32:36,722 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 13 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2020-10-16 02:32:36,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 70 transitions, 393 flow [2020-10-16 02:32:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 706 transitions. [2020-10-16 02:32:36,724 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6955665024630542 [2020-10-16 02:32:36,724 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 706 transitions. [2020-10-16 02:32:36,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 706 transitions. [2020-10-16 02:32:36,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:36,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 706 transitions. [2020-10-16 02:32:36,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:36,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:36,726 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:36,726 INFO L185 Difference]: Start difference. First operand has 81 places, 66 transitions, 347 flow. Second operand 5 states and 706 transitions. [2020-10-16 02:32:36,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 70 transitions, 393 flow [2020-10-16 02:32:36,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 70 transitions, 387 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:32:36,736 INFO L241 Difference]: Finished difference. Result has 84 places, 67 transitions, 361 flow [2020-10-16 02:32:36,736 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2020-10-16 02:32:36,737 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2020-10-16 02:32:36,737 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 361 flow [2020-10-16 02:32:36,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:32:36,737 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:36,737 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:36,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:36,938 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1773387480, now seen corresponding path program 1 times [2020-10-16 02:32:36,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:36,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896950587] [2020-10-16 02:32:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:36,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896950587] [2020-10-16 02:32:36,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072969878] [2020-10-16 02:32:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:32:37,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:37,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:37,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:32:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230859777] [2020-10-16 02:32:37,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:32:37,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:32:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:32:37,154 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:37,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 361 flow. Second operand 10 states. [2020-10-16 02:32:37,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:37,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:37,155 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:38,731 INFO L129 PetriNetUnfolder]: 5159/12485 cut-off events. [2020-10-16 02:32:38,732 INFO L130 PetriNetUnfolder]: For 6503/6503 co-relation queries the response was YES. [2020-10-16 02:32:38,844 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30238 conditions, 12485 events. 5159/12485 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108249 event pairs, 3134 based on Foata normal form. 1/11463 useless extension candidates. Maximal degree in co-relation 30178. Up to 6206 conditions per place. [2020-10-16 02:32:38,898 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 14 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2020-10-16 02:32:38,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 415 flow [2020-10-16 02:32:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:32:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:32:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 846 transitions. [2020-10-16 02:32:38,900 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6945812807881774 [2020-10-16 02:32:38,900 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 846 transitions. [2020-10-16 02:32:38,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 846 transitions. [2020-10-16 02:32:38,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:38,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 846 transitions. [2020-10-16 02:32:38,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:32:38,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:32:38,909 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:32:38,909 INFO L185 Difference]: Start difference. First operand has 84 places, 67 transitions, 361 flow. Second operand 6 states and 846 transitions. [2020-10-16 02:32:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 415 flow [2020-10-16 02:32:38,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 405 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:32:38,929 INFO L241 Difference]: Finished difference. Result has 87 places, 68 transitions, 375 flow [2020-10-16 02:32:38,929 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2020-10-16 02:32:38,929 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2020-10-16 02:32:38,930 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 375 flow [2020-10-16 02:32:38,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:32:38,930 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:38,930 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:39,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:39,139 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:39,139 INFO L82 PathProgramCache]: Analyzing trace with hash 43326697, now seen corresponding path program 1 times [2020-10-16 02:32:39,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:39,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837434658] [2020-10-16 02:32:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:39,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837434658] [2020-10-16 02:32:39,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666312433] [2020-10-16 02:32:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:39,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:32:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:39,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:39,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:32:39,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232095356] [2020-10-16 02:32:39,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:32:39,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:32:39,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:32:39,379 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:39,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 375 flow. Second operand 12 states. [2020-10-16 02:32:39,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:39,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:39,381 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:40,776 INFO L129 PetriNetUnfolder]: 5155/12471 cut-off events. [2020-10-16 02:32:40,776 INFO L130 PetriNetUnfolder]: For 6522/6522 co-relation queries the response was YES. [2020-10-16 02:32:40,885 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30216 conditions, 12471 events. 5155/12471 cut-off events. For 6522/6522 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108601 event pairs, 3145 based on Foata normal form. 1/11449 useless extension candidates. Maximal degree in co-relation 30140. Up to 5163 conditions per place. [2020-10-16 02:32:40,941 INFO L132 encePairwiseOnDemand]: 197/203 looper letters, 10 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2020-10-16 02:32:40,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 74 transitions, 437 flow [2020-10-16 02:32:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:32:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:32:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1124 transitions. [2020-10-16 02:32:40,943 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6921182266009852 [2020-10-16 02:32:40,943 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1124 transitions. [2020-10-16 02:32:40,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1124 transitions. [2020-10-16 02:32:40,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:40,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1124 transitions. [2020-10-16 02:32:40,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:32:40,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:32:40,947 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:32:40,947 INFO L185 Difference]: Start difference. First operand has 87 places, 68 transitions, 375 flow. Second operand 8 states and 1124 transitions. [2020-10-16 02:32:40,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 74 transitions, 437 flow [2020-10-16 02:32:40,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 74 transitions, 423 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:40,962 INFO L241 Difference]: Finished difference. Result has 92 places, 70 transitions, 408 flow [2020-10-16 02:32:40,962 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2020-10-16 02:32:40,962 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2020-10-16 02:32:40,962 INFO L481 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 408 flow [2020-10-16 02:32:40,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:32:40,962 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:40,962 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:41,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:41,163 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:41,164 INFO L82 PathProgramCache]: Analyzing trace with hash 594075057, now seen corresponding path program 1 times [2020-10-16 02:32:41,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:41,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583215188] [2020-10-16 02:32:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:41,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583215188] [2020-10-16 02:32:41,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088554600] [2020-10-16 02:32:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:41,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:41,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 02:32:41,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566718886] [2020-10-16 02:32:41,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:32:41,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:41,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:32:41,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:32:41,335 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:41,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 408 flow. Second operand 7 states. [2020-10-16 02:32:41,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:41,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:41,336 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:43,001 INFO L129 PetriNetUnfolder]: 5330/13919 cut-off events. [2020-10-16 02:32:43,001 INFO L130 PetriNetUnfolder]: For 12763/12763 co-relation queries the response was YES. [2020-10-16 02:32:43,128 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37401 conditions, 13919 events. 5330/13919 cut-off events. For 12763/12763 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 130019 event pairs, 3365 based on Foata normal form. 45/12951 useless extension candidates. Maximal degree in co-relation 18883. Up to 5375 conditions per place. [2020-10-16 02:32:43,181 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 14 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2020-10-16 02:32:43,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 76 transitions, 483 flow [2020-10-16 02:32:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 711 transitions. [2020-10-16 02:32:43,183 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7004926108374384 [2020-10-16 02:32:43,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 711 transitions. [2020-10-16 02:32:43,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 711 transitions. [2020-10-16 02:32:43,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:43,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 711 transitions. [2020-10-16 02:32:43,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:43,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:43,184 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:43,185 INFO L185 Difference]: Start difference. First operand has 92 places, 70 transitions, 408 flow. Second operand 5 states and 711 transitions. [2020-10-16 02:32:43,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 76 transitions, 483 flow [2020-10-16 02:32:43,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 76 transitions, 459 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:43,217 INFO L241 Difference]: Finished difference. Result has 93 places, 72 transitions, 425 flow [2020-10-16 02:32:43,217 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2020-10-16 02:32:43,217 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 21 predicate places. [2020-10-16 02:32:43,217 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 425 flow [2020-10-16 02:32:43,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:32:43,218 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:43,218 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:43,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-16 02:32:43,425 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2031979255, now seen corresponding path program 1 times [2020-10-16 02:32:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:43,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690854089] [2020-10-16 02:32:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 02:32:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690854089] [2020-10-16 02:32:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736447981] [2020-10-16 02:32:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:32:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 02:32:43,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:43,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-16 02:32:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615128378] [2020-10-16 02:32:43,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 02:32:43,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:43,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 02:32:43,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-16 02:32:43,645 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:43,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 425 flow. Second operand 9 states. [2020-10-16 02:32:43,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:43,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:43,646 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:45,716 INFO L129 PetriNetUnfolder]: 5790/15797 cut-off events. [2020-10-16 02:32:45,716 INFO L130 PetriNetUnfolder]: For 21329/21329 co-relation queries the response was YES. [2020-10-16 02:32:45,958 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50568 conditions, 15797 events. 5790/15797 cut-off events. For 21329/21329 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 157387 event pairs, 3980 based on Foata normal form. 155/14984 useless extension candidates. Maximal degree in co-relation 25513. Up to 6215 conditions per place. [2020-10-16 02:32:46,036 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 15 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2020-10-16 02:32:46,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 80 transitions, 521 flow [2020-10-16 02:32:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:32:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:32:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 854 transitions. [2020-10-16 02:32:46,038 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2020-10-16 02:32:46,038 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 854 transitions. [2020-10-16 02:32:46,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 854 transitions. [2020-10-16 02:32:46,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:46,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 854 transitions. [2020-10-16 02:32:46,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:32:46,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:32:46,045 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:32:46,045 INFO L185 Difference]: Start difference. First operand has 93 places, 72 transitions, 425 flow. Second operand 6 states and 854 transitions. [2020-10-16 02:32:46,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 80 transitions, 521 flow [2020-10-16 02:32:46,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 497 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-16 02:32:46,127 INFO L241 Difference]: Finished difference. Result has 94 places, 74 transitions, 452 flow [2020-10-16 02:32:46,127 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2020-10-16 02:32:46,128 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 22 predicate places. [2020-10-16 02:32:46,129 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 452 flow [2020-10-16 02:32:46,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 02:32:46,129 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:46,129 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:46,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:46,337 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1529297233, now seen corresponding path program 1 times [2020-10-16 02:32:46,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:46,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873063041] [2020-10-16 02:32:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:46,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873063041] [2020-10-16 02:32:46,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528341838] [2020-10-16 02:32:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 02:32:46,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:46,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 02:32:46,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2020-10-16 02:32:46,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923726235] [2020-10-16 02:32:46,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:32:46,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:32:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2020-10-16 02:32:46,944 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:46,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states. [2020-10-16 02:32:46,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:46,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:46,946 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:52,949 INFO L129 PetriNetUnfolder]: 8000/34514 cut-off events. [2020-10-16 02:32:52,949 INFO L130 PetriNetUnfolder]: For 41105/41105 co-relation queries the response was YES. [2020-10-16 02:32:53,351 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136378 conditions, 34514 events. 8000/34514 cut-off events. For 41105/41105 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 475498 event pairs, 7158 based on Foata normal form. 2/27740 useless extension candidates. Maximal degree in co-relation 71197. Up to 18423 conditions per place. [2020-10-16 02:32:53,493 INFO L132 encePairwiseOnDemand]: 195/203 looper letters, 28 selfloop transitions, 45 changer transitions 0/125 dead transitions. [2020-10-16 02:32:53,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 125 transitions, 961 flow [2020-10-16 02:32:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 02:32:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 02:32:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1870 transitions. [2020-10-16 02:32:53,496 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7086017430845017 [2020-10-16 02:32:53,496 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1870 transitions. [2020-10-16 02:32:53,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1870 transitions. [2020-10-16 02:32:53,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:53,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1870 transitions. [2020-10-16 02:32:53,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 02:32:53,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 02:32:53,503 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 02:32:53,503 INFO L185 Difference]: Start difference. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states and 1870 transitions. [2020-10-16 02:32:53,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 125 transitions, 961 flow [2020-10-16 02:32:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 125 transitions, 893 flow, removed 10 selfloop flow, removed 7 redundant places. [2020-10-16 02:32:53,580 INFO L241 Difference]: Finished difference. Result has 99 places, 101 transitions, 709 flow [2020-10-16 02:32:53,580 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=709, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2020-10-16 02:32:53,581 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 02:32:53,581 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 709 flow [2020-10-16 02:32:53,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:32:53,581 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:53,581 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:53,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-16 02:32:53,790 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:53,790 INFO L82 PathProgramCache]: Analyzing trace with hash 982291090, now seen corresponding path program 1 times [2020-10-16 02:32:53,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:53,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862691903] [2020-10-16 02:32:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 02:32:53,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862691903] [2020-10-16 02:32:53,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164961756] [2020-10-16 02:32:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:53,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:32:53,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 02:32:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-16 02:32:54,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168380147] [2020-10-16 02:32:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 02:32:54,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 02:32:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-16 02:32:54,025 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:54,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 709 flow. Second operand 11 states. [2020-10-16 02:32:54,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:54,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:54,026 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:59,431 INFO L129 PetriNetUnfolder]: 7795/31181 cut-off events. [2020-10-16 02:32:59,432 INFO L130 PetriNetUnfolder]: For 48064/48064 co-relation queries the response was YES. [2020-10-16 02:32:59,814 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127675 conditions, 31181 events. 7795/31181 cut-off events. For 48064/48064 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 416479 event pairs, 7158 based on Foata normal form. 1173/32354 useless extension candidates. Maximal degree in co-relation 69147. Up to 14854 conditions per place. [2020-10-16 02:32:59,948 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 30 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2020-10-16 02:32:59,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 108 transitions, 858 flow [2020-10-16 02:32:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 02:32:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 02:32:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 997 transitions. [2020-10-16 02:32:59,950 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7016185784658691 [2020-10-16 02:32:59,950 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 997 transitions. [2020-10-16 02:32:59,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 997 transitions. [2020-10-16 02:32:59,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:59,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 997 transitions. [2020-10-16 02:32:59,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 02:32:59,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 02:32:59,955 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 02:32:59,955 INFO L185 Difference]: Start difference. First operand has 99 places, 101 transitions, 709 flow. Second operand 7 states and 997 transitions. [2020-10-16 02:32:59,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 108 transitions, 858 flow [2020-10-16 02:33:00,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 108 transitions, 772 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 02:33:00,143 INFO L241 Difference]: Finished difference. Result has 99 places, 100 transitions, 676 flow [2020-10-16 02:33:00,144 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2020-10-16 02:33:00,144 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 02:33:00,144 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 676 flow [2020-10-16 02:33:00,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 02:33:00,144 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:33:00,145 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:33:00,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:33:00,352 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:33:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:33:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1039046273, now seen corresponding path program 1 times [2020-10-16 02:33:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:33:00,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878643198] [2020-10-16 02:33:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:33:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:33:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 02:33:00,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878643198] [2020-10-16 02:33:00,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063345869] [2020-10-16 02:33:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:33:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:33:00,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:33:00,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:33:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 02:33:00,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:33:00,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-16 02:33:00,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342334012] [2020-10-16 02:33:00,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:33:00,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:33:00,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:33:00,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-16 02:33:00,660 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:33:00,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 676 flow. Second operand 13 states. [2020-10-16 02:33:00,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:33:00,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:33:00,661 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:33:06,493 INFO L129 PetriNetUnfolder]: 7544/26512 cut-off events. [2020-10-16 02:33:06,494 INFO L130 PetriNetUnfolder]: For 46723/46723 co-relation queries the response was YES. [2020-10-16 02:33:06,790 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106037 conditions, 26512 events. 7544/26512 cut-off events. For 46723/46723 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 328770 event pairs, 7158 based on Foata normal form. 1099/27611 useless extension candidates. Maximal degree in co-relation 45658. Up to 9645 conditions per place. [2020-10-16 02:33:06,902 INFO L132 encePairwiseOnDemand]: 194/203 looper letters, 16 selfloop transitions, 40 changer transitions 0/108 dead transitions. [2020-10-16 02:33:06,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 832 flow [2020-10-16 02:33:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 02:33:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-16 02:33:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1278 transitions. [2020-10-16 02:33:06,905 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 02:33:06,905 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1278 transitions. [2020-10-16 02:33:06,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1278 transitions. [2020-10-16 02:33:06,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:33:06,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1278 transitions. [2020-10-16 02:33:06,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-16 02:33:06,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-16 02:33:06,910 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-16 02:33:06,910 INFO L185 Difference]: Start difference. First operand has 99 places, 100 transitions, 676 flow. Second operand 9 states and 1278 transitions. [2020-10-16 02:33:06,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 832 flow [2020-10-16 02:33:07,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 108 transitions, 770 flow, removed 6 selfloop flow, removed 6 redundant places. [2020-10-16 02:33:07,042 INFO L241 Difference]: Finished difference. Result has 103 places, 100 transitions, 731 flow [2020-10-16 02:33:07,042 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=731, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2020-10-16 02:33:07,043 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 31 predicate places. [2020-10-16 02:33:07,043 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 731 flow [2020-10-16 02:33:07,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:33:07,043 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:33:07,043 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:33:07,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 02:33:07,244 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:33:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:33:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash -967832978, now seen corresponding path program 1 times [2020-10-16 02:33:07,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:33:07,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035630103] [2020-10-16 02:33:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:33:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:33:07,302 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:33:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:33:07,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:33:07,356 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:33:07,356 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:33:07,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-16 02:33:07,357 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:33:07,357 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:33:07,357 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:33:07,358 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:33:07,362 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1812] [1812] L676-->L691-5: Formula: (and (= ULTIMATE.start_main_~i~0_Out22766306 0) (not (= ULTIMATE.start_assume_abort_if_not_~cond_In22766306 0))) InVars {ULTIMATE.start_assume_abort_if_not_~cond=ULTIMATE.start_assume_abort_if_not_~cond_In22766306} OutVars{ULTIMATE.start_assume_abort_if_not_~cond=ULTIMATE.start_assume_abort_if_not_~cond_In22766306, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_Out22766306} AuxVars[] AssignedVars[ULTIMATE.start_main_~i~0] because there is no mapped edge [2020-10-16 02:33:07,368 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1798] [1798] L691-5-->L694-5: Formula: (and (not (< ULTIMATE.start_main_~i~0_In603226049 ULTIMATE.start_main_~n~0_In603226049)) (= ULTIMATE.start_main_~i~0_Out603226049 0)) InVars {ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In603226049, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In603226049} OutVars{ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In603226049, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_Out603226049} AuxVars[] AssignedVars[ULTIMATE.start_main_~i~0] because there is no mapped edge [2020-10-16 02:33:07,385 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1800] [1800] L694-5-->L698: Formula: (and (not (< ULTIMATE.start_main_~i~0_In370906690 ULTIMATE.start_main_~n~0_In370906690)) (= ULTIMATE.start_main_~sum~0_Out370906690 0)) InVars {ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In370906690, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In370906690} OutVars{ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In370906690, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In370906690, ULTIMATE.start_main_~sum~0=ULTIMATE.start_main_~sum~0_Out370906690} AuxVars[] AssignedVars[ULTIMATE.start_main_~sum~0] because there is no mapped edge [2020-10-16 02:33:07,389 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1799] [1799] L698-6-->L701: Formula: (and (let ((.cse0 (= ULTIMATE.start_main_~sum~0_In-2019734660 9))) (or (and (not .cse0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond_Out-2019734660| 0)) (and .cse0 (= |ULTIMATE.start___VERIFIER_assert_#in~cond_Out-2019734660| 1)))) (not (< ULTIMATE.start_main_~i~0_In-2019734660 ULTIMATE.start_main_~n~0_In-2019734660))) InVars {ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In-2019734660, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In-2019734660, ULTIMATE.start_main_~sum~0=ULTIMATE.start_main_~sum~0_In-2019734660} OutVars{ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In-2019734660, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In-2019734660, ULTIMATE.start___VERIFIER_assert_#in~cond=|ULTIMATE.start___VERIFIER_assert_#in~cond_Out-2019734660|, ULTIMATE.start_main_~sum~0=ULTIMATE.start_main_~sum~0_In-2019734660} AuxVars[] AssignedVars[ULTIMATE.start___VERIFIER_assert_#in~cond] because there is no mapped edge [2020-10-16 02:33:07,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:33:07 BasicIcfg [2020-10-16 02:33:07,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 02:33:07,460 INFO L168 Benchmark]: Toolchain (without parser) took 101598.72 ms. Allocated memory was 252.7 MB in the beginning and 3.4 GB in the end (delta: 3.2 GB). Free memory was 208.5 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.6 GB. Max. memory is 14.2 GB. [2020-10-16 02:33:07,461 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 252.7 MB. Free memory was 230.8 MB in the beginning and 229.9 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 14.2 GB. [2020-10-16 02:33:07,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 841.72 ms. Allocated memory was 252.7 MB in the beginning and 317.2 MB in the end (delta: 64.5 MB). Free memory was 208.5 MB in the beginning and 273.5 MB in the end (delta: -65.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. [2020-10-16 02:33:07,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.06 ms. Allocated memory is still 317.2 MB. Free memory was 273.5 MB in the beginning and 271.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-16 02:33:07,462 INFO L168 Benchmark]: Boogie Preprocessor took 30.93 ms. Allocated memory is still 317.2 MB. Free memory was 271.8 MB in the beginning and 270.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-16 02:33:07,462 INFO L168 Benchmark]: RCFGBuilder took 523.97 ms. Allocated memory is still 317.2 MB. Free memory was 270.2 MB in the beginning and 246.2 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 14.2 GB. [2020-10-16 02:33:07,463 INFO L168 Benchmark]: TraceAbstraction took 100120.35 ms. Allocated memory was 317.2 MB in the beginning and 3.4 GB in the end (delta: 3.1 GB). Free memory was 246.2 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.6 GB. Max. memory is 14.2 GB. [2020-10-16 02:33:07,465 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 252.7 MB. Free memory was 230.8 MB in the beginning and 229.9 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 841.72 ms. Allocated memory was 252.7 MB in the beginning and 317.2 MB in the end (delta: 64.5 MB). Free memory was 208.5 MB in the beginning and 273.5 MB in the end (delta: -65.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 74.06 ms. Allocated memory is still 317.2 MB. Free memory was 273.5 MB in the beginning and 271.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.93 ms. Allocated memory is still 317.2 MB. Free memory was 271.8 MB in the beginning and 270.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 523.97 ms. Allocated memory is still 317.2 MB. Free memory was 270.2 MB in the beginning and 246.2 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 100120.35 ms. Allocated memory was 317.2 MB in the beginning and 3.4 GB in the end (delta: 3.1 GB). Free memory was 246.2 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.6 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 212 VarBasedMoverChecksPositive, 11 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 11 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 6 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.6s, 61 PlacesBefore, 14 PlacesAfterwards, 64 TransitionsBefore, 13 TransitionsAfterwards, 300 CoEnabledTransitionPairs, 5 FixpointIterations, 24 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 56 TotalNumberOfCompositions, 320 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 553 VarBasedMoverChecksPositive, 21 VarBasedMoverChecksNegative, 2 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 117 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 69 PlacesBefore, 24 PlacesAfterwards, 71 TransitionsBefore, 22 TransitionsAfterwards, 760 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 54 TotalNumberOfCompositions, 1958 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 848 VarBasedMoverChecksPositive, 36 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 30 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 216 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 77 PlacesBefore, 30 PlacesAfterwards, 78 TransitionsBefore, 27 TransitionsAfterwards, 1260 CoEnabledTransitionPairs, 6 FixpointIterations, 22 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 57 TotalNumberOfCompositions, 3644 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1277 VarBasedMoverChecksPositive, 41 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 41 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 242 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.5s, 85 PlacesBefore, 36 PlacesAfterwards, 85 TransitionsBefore, 32 TransitionsAfterwards, 1840 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 59 TotalNumberOfCompositions, 6546 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1528 VarBasedMoverChecksPositive, 66 VarBasedMoverChecksNegative, 18 SemBasedMoverChecksPositive, 48 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 356 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 93 PlacesBefore, 42 PlacesAfterwards, 92 TransitionsBefore, 37 TransitionsAfterwards, 2500 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 59 TotalNumberOfCompositions, 8810 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2093 VarBasedMoverChecksPositive, 87 VarBasedMoverChecksNegative, 30 SemBasedMoverChecksPositive, 57 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 512 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.2s, 101 PlacesBefore, 48 PlacesAfterwards, 99 TransitionsBefore, 42 TransitionsAfterwards, 3240 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 62 TotalNumberOfCompositions, 11418 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 3188 VarBasedMoverChecksPositive, 104 VarBasedMoverChecksNegative, 42 SemBasedMoverChecksPositive, 62 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 895 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.3s, 109 PlacesBefore, 54 PlacesAfterwards, 106 TransitionsBefore, 47 TransitionsAfterwards, 4060 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 65 TotalNumberOfCompositions, 18122 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 3348 VarBasedMoverChecksPositive, 137 VarBasedMoverChecksNegative, 56 SemBasedMoverChecksPositive, 81 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.5s, 884 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.7s, 117 PlacesBefore, 60 PlacesAfterwards, 113 TransitionsBefore, 52 TransitionsAfterwards, 4960 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 20069 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 4232 VarBasedMoverChecksPositive, 73 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 73 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 1110 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.8s, 125 PlacesBefore, 66 PlacesAfterwards, 120 TransitionsBefore, 57 TransitionsAfterwards, 5940 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 71 TotalNumberOfCompositions, 28628 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 4886 VarBasedMoverChecksPositive, 208 VarBasedMoverChecksNegative, 90 SemBasedMoverChecksPositive, 118 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.9s, 1400 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 7.3s, 133 PlacesBefore, 72 PlacesAfterwards, 127 TransitionsBefore, 62 TransitionsAfterwards, 7000 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 69 TotalNumberOfCompositions, 33303 MoverChecksTotal - CounterExampleResult [Line: 678]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L679] 0 int a[10] = {0}; [L680] 0 int x = 0; [L687] 0 pthread_t t[10]; [L688] 0 int i; [L689] 0 int n = __VERIFIER_nondet_uint(); [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, x=0] [L682] 2 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=0] [L683] 2 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=0] [L684] 2 x = t + 1 [L695] FCALL, JOIN 2 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L682] 3 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=1] [L683] 3 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=1] [L684] 3 x = t + 1 [L695] FCALL, JOIN 3 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L682] 4 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L683] 4 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L684] 4 x = t + 1 [L695] FCALL, JOIN 4 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L682] 5 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L683] 5 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L684] 5 x = t + 1 [L695] FCALL, JOIN 5 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L682] 1 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L683] 1 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L684] 1 x = t + 1 [L695] FCALL, JOIN 1 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] 0 i = 0 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L678] COND TRUE 0 !(cond) [L678] 0 __VERIFIER_error() VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 64 locations, 1 error locations. Started 10 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 99.5s, OverallIterations: 58, TraceHistogramMax: 11, AutomataDifference: 45.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 40.5s, HoareTripleCheckerStatistics: 236 SDtfs, 320 SDslu, 0 SDs, 0 SdLazy, 1411 SolverSat, 261 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 902 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=731occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1876 NumberOfCodeBlocks, 1876 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 1529 ConstructedInterpolants, 0 QuantifiedInterpolants, 176091 SizeOfPredicates, 30 NumberOfNonLiveVariables, 3351 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 77 InterpolantComputations, 20 PerfectInterpolantSequences, 1044/1625 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...