/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-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 03:51:44,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 03:51:44,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 03:51:44,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 03:51:44,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 03:51:44,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 03:51:44,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 03:51:44,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 03:51:44,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 03:51:44,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 03:51:44,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 03:51:44,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 03:51:44,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 03:51:44,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 03:51:44,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 03:51:44,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 03:51:44,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 03:51:44,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 03:51:44,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 03:51:44,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 03:51:44,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 03:51:44,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 03:51:44,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 03:51:44,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 03:51:44,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 03:51:44,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 03:51:44,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 03:51:44,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 03:51:44,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 03:51:44,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 03:51:44,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 03:51:44,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 03:51:44,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 03:51:44,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 03:51:44,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 03:51:44,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 03:51:44,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 03:51:44,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 03:51:44,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 03:51:44,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 03:51:44,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 03:51:44,442 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-SemanticLooper.epf [2020-10-16 03:51:44,482 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 03:51:44,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 03:51:44,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 03:51:44,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 03:51:44,485 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 03:51:44,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 03:51:44,486 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 03:51:44,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 03:51:44,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 03:51:44,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 03:51:44,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 03:51:44,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 03:51:44,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 03:51:44,488 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 03:51:44,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 03:51:44,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 03:51:44,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 03:51:44,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 03:51:44,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 03:51:44,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 03:51:44,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 03:51:44,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 03:51:44,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 03:51:44,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 03:51:44,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 03:51:44,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 03:51:44,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 03:51:44,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 03:51:44,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 03:51:44,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 03:51:44,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 03:51:44,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 03:51:44,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 03:51:44,832 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 03:51:44,832 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2020-10-16 03:51:44,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1134f8da9/57eb26fc72a445b58b0ca7f46fc57700/FLAG455a5d2b3 [2020-10-16 03:51:45,479 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 03:51:45,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2020-10-16 03:51:45,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1134f8da9/57eb26fc72a445b58b0ca7f46fc57700/FLAG455a5d2b3 [2020-10-16 03:51:45,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1134f8da9/57eb26fc72a445b58b0ca7f46fc57700 [2020-10-16 03:51:45,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 03:51:45,738 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 03:51:45,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 03:51:45,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 03:51:45,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 03:51:45,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:51:45" (1/1) ... [2020-10-16 03:51:45,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58129f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:45, skipping insertion in model container [2020-10-16 03:51:45,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:51:45" (1/1) ... [2020-10-16 03:51:45,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 03:51:45,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 03:51:46,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:51:46,289 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 03:51:46,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:51:46,397 INFO L208 MainTranslator]: Completed translation [2020-10-16 03:51:46,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46 WrapperNode [2020-10-16 03:51:46,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 03:51:46,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 03:51:46,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 03:51:46,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 03:51:46,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 03:51:46,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 03:51:46,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 03:51:46,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 03:51:46,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (1/1) ... [2020-10-16 03:51:46,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 03:51:46,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 03:51:46,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 03:51:46,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 03:51:46,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (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 03:51:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-16 03:51:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-16 03:51:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 03:51:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 03:51:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 03:51:46,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 03:51:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 03:51:46,555 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 03:51:46,865 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 03:51:46,865 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-16 03:51:46,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:51:46 BoogieIcfgContainer [2020-10-16 03:51:46,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 03:51:46,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 03:51:46,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 03:51:46,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 03:51:46,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:51:45" (1/3) ... [2020-10-16 03:51:46,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51293f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:51:46, skipping insertion in model container [2020-10-16 03:51:46,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:51:46" (2/3) ... [2020-10-16 03:51:46,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51293f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:51:46, skipping insertion in model container [2020-10-16 03:51:46,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:51:46" (3/3) ... [2020-10-16 03:51:46,876 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2020-10-16 03:51:46,892 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 03:51:46,901 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-16 03:51:46,902 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 03:51:46,931 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,932 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,932 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,932 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,934 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,934 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,939 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,940 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,940 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,940 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:51:46,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 03:51:46,988 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 03:51:46,988 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 03:51:46,988 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 03:51:46,989 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 03:51:46,989 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 03:51:46,989 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 03:51:46,989 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 03:51:46,989 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 03:51:47,005 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 62 places, 82 transitions, 169 flow [2020-10-16 03:51:47,078 INFO L129 PetriNetUnfolder]: 24/81 cut-off events. [2020-10-16 03:51:47,078 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:51:47,085 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 81 events. 24/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2020-10-16 03:51:47,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 82 transitions, 169 flow [2020-10-16 03:51:47,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 81 transitions, 165 flow [2020-10-16 03:51:47,096 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 03:51:47,099 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 81 transitions, 165 flow [2020-10-16 03:51:47,102 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 81 transitions, 165 flow [2020-10-16 03:51:47,102 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 81 transitions, 165 flow [2020-10-16 03:51:47,124 INFO L129 PetriNetUnfolder]: 24/81 cut-off events. [2020-10-16 03:51:47,125 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:51:47,126 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 81 events. 24/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2020-10-16 03:51:47,132 INFO L117 LiptonReduction]: Number of co-enabled transitions 2400 [2020-10-16 03:51:47,944 INFO L132 LiptonReduction]: Checked pairs total: 4233 [2020-10-16 03:51:47,944 INFO L134 LiptonReduction]: Total number of compositions: 43 [2020-10-16 03:51:47,947 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 853 [2020-10-16 03:51:47,959 INFO L129 PetriNetUnfolder]: 14/38 cut-off events. [2020-10-16 03:51:47,960 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:51:47,960 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:51:47,961 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:51:47,961 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:51:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:51:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1529682656, now seen corresponding path program 1 times [2020-10-16 03:51:47,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:51:47,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650361131] [2020-10-16 03:51:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:51:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:51:48,204 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 03:51:48,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650361131] [2020-10-16 03:51:48,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:51:48,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:51:48,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431411383] [2020-10-16 03:51:48,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-16 03:51:48,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:51:48,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-16 03:51:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-16 03:51:48,247 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 125 [2020-10-16 03:51:48,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 50 transitions, 103 flow. Second operand 2 states. [2020-10-16 03:51:48,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:51:48,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 125 [2020-10-16 03:51:48,251 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:51:48,271 INFO L129 PetriNetUnfolder]: 12/40 cut-off events. [2020-10-16 03:51:48,272 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:51:48,273 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 40 events. 12/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 10/38 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-10-16 03:51:48,275 INFO L132 encePairwiseOnDemand]: 115/125 looper letters, 0 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2020-10-16 03:51:48,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 83 flow [2020-10-16 03:51:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-16 03:51:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-16 03:51:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 192 transitions. [2020-10-16 03:51:48,292 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.768 [2020-10-16 03:51:48,293 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 192 transitions. [2020-10-16 03:51:48,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 192 transitions. [2020-10-16 03:51:48,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:51:48,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 192 transitions. [2020-10-16 03:51:48,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-16 03:51:48,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-16 03:51:48,315 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-16 03:51:48,317 INFO L185 Difference]: Start difference. First operand has 34 places, 50 transitions, 103 flow. Second operand 2 states and 192 transitions. [2020-10-16 03:51:48,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 83 flow [2020-10-16 03:51:48,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 82 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 03:51:48,326 INFO L241 Difference]: Finished difference. Result has 32 places, 40 transitions, 82 flow [2020-10-16 03:51:48,330 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=40} [2020-10-16 03:51:48,330 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2020-10-16 03:51:48,331 INFO L481 AbstractCegarLoop]: Abstraction has has 32 places, 40 transitions, 82 flow [2020-10-16 03:51:48,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-16 03:51:48,331 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:51:48,331 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:51:48,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 03:51:48,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:51:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:51:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1746695160, now seen corresponding path program 1 times [2020-10-16 03:51:48,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:51:48,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457301351] [2020-10-16 03:51:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:51:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:51:48,410 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 03:51:48,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457301351] [2020-10-16 03:51:48,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:51:48,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:51:48,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501952575] [2020-10-16 03:51:48,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 03:51:48,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:51:48,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 03:51:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 03:51:48,415 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 125 [2020-10-16 03:51:48,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 40 transitions, 82 flow. Second operand 3 states. [2020-10-16 03:51:48,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:51:48,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 125 [2020-10-16 03:51:48,416 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:51:48,465 INFO L129 PetriNetUnfolder]: 56/157 cut-off events. [2020-10-16 03:51:48,465 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:51:48,467 INFO L80 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 157 events. 56/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 445 event pairs, 2 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 196. Up to 24 conditions per place. [2020-10-16 03:51:48,469 INFO L132 encePairwiseOnDemand]: 120/125 looper letters, 8 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2020-10-16 03:51:48,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 112 flow [2020-10-16 03:51:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 03:51:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 03:51:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2020-10-16 03:51:48,473 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6506666666666666 [2020-10-16 03:51:48,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2020-10-16 03:51:48,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2020-10-16 03:51:48,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:51:48,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2020-10-16 03:51:48,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 03:51:48,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 03:51:48,476 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 03:51:48,476 INFO L185 Difference]: Start difference. First operand has 32 places, 40 transitions, 82 flow. Second operand 3 states and 244 transitions. [2020-10-16 03:51:48,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 112 flow [2020-10-16 03:51:48,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 03:51:48,479 INFO L241 Difference]: Finished difference. Result has 36 places, 42 transitions, 106 flow [2020-10-16 03:51:48,479 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=36, PETRI_TRANSITIONS=42} [2020-10-16 03:51:48,480 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2020-10-16 03:51:48,480 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 42 transitions, 106 flow [2020-10-16 03:51:48,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 03:51:48,481 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:51:48,481 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:51:48,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 03:51:48,481 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:51:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:51:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash -711325857, now seen corresponding path program 1 times [2020-10-16 03:51:48,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:51:48,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062403400] [2020-10-16 03:51:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:51:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:51:48,539 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 03:51:48,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062403400] [2020-10-16 03:51:48,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:51:48,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:51:48,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6373054] [2020-10-16 03:51:48,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 03:51:48,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:51:48,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 03:51:48,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 03:51:48,545 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 125 [2020-10-16 03:51:48,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 42 transitions, 106 flow. Second operand 3 states. [2020-10-16 03:51:48,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:51:48,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 125 [2020-10-16 03:51:48,546 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:51:48,594 INFO L129 PetriNetUnfolder]: 46/133 cut-off events. [2020-10-16 03:51:48,595 INFO L130 PetriNetUnfolder]: For 22/26 co-relation queries the response was YES. [2020-10-16 03:51:48,596 INFO L80 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 133 events. 46/133 cut-off events. For 22/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 343 event pairs, 2 based on Foata normal form. 8/105 useless extension candidates. Maximal degree in co-relation 193. Up to 16 conditions per place. [2020-10-16 03:51:48,597 INFO L132 encePairwiseOnDemand]: 121/125 looper letters, 7 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2020-10-16 03:51:48,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 124 flow [2020-10-16 03:51:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 03:51:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 03:51:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2020-10-16 03:51:48,600 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6453333333333333 [2020-10-16 03:51:48,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2020-10-16 03:51:48,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2020-10-16 03:51:48,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:51:48,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2020-10-16 03:51:48,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 03:51:48,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 03:51:48,603 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 03:51:48,603 INFO L185 Difference]: Start difference. First operand has 36 places, 42 transitions, 106 flow. Second operand 3 states and 242 transitions. [2020-10-16 03:51:48,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 124 flow [2020-10-16 03:51:48,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 03:51:48,606 INFO L241 Difference]: Finished difference. Result has 37 places, 42 transitions, 110 flow [2020-10-16 03:51:48,606 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=42} [2020-10-16 03:51:48,606 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2020-10-16 03:51:48,607 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 42 transitions, 110 flow [2020-10-16 03:51:48,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 03:51:48,607 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:51:48,607 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:51:48,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 03:51:48,607 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:51:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:51:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1011217883, now seen corresponding path program 1 times [2020-10-16 03:51:48,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:51:48,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366326653] [2020-10-16 03:51:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:51:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:51:48,642 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 03:51:48,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366326653] [2020-10-16 03:51:48,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:51:48,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 03:51:48,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894317829] [2020-10-16 03:51:48,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 03:51:48,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:51:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 03:51:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 03:51:48,645 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 125 [2020-10-16 03:51:48,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 42 transitions, 110 flow. Second operand 3 states. [2020-10-16 03:51:48,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:51:48,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 125 [2020-10-16 03:51:48,646 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:51:48,733 INFO L129 PetriNetUnfolder]: 264/518 cut-off events. [2020-10-16 03:51:48,733 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-16 03:51:48,735 INFO L80 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 518 events. 264/518 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2089 event pairs, 52 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 889. Up to 225 conditions per place. [2020-10-16 03:51:48,739 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 19 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2020-10-16 03:51:48,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 178 flow [2020-10-16 03:51:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 03:51:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 03:51:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2020-10-16 03:51:48,742 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.64 [2020-10-16 03:51:48,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2020-10-16 03:51:48,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2020-10-16 03:51:48,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:51:48,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2020-10-16 03:51:48,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 03:51:48,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 03:51:48,745 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 03:51:48,745 INFO L185 Difference]: Start difference. First operand has 37 places, 42 transitions, 110 flow. Second operand 3 states and 240 transitions. [2020-10-16 03:51:48,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 178 flow [2020-10-16 03:51:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 03:51:48,749 INFO L241 Difference]: Finished difference. Result has 40 places, 47 transitions, 162 flow [2020-10-16 03:51:48,749 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=40, PETRI_TRANSITIONS=47} [2020-10-16 03:51:48,749 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2020-10-16 03:51:48,750 INFO L481 AbstractCegarLoop]: Abstraction has has 40 places, 47 transitions, 162 flow [2020-10-16 03:51:48,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 03:51:48,750 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:51:48,750 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:51:48,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 03:51:48,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:51:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:51:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1253516747, now seen corresponding path program 2 times [2020-10-16 03:51:48,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:51:48,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584486704] [2020-10-16 03:51:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:51:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:51:48,784 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 03:51:48,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584486704] [2020-10-16 03:51:48,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:51:48,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 03:51:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637110791] [2020-10-16 03:51:48,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 03:51:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:51:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 03:51:48,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 03:51:48,790 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 125 [2020-10-16 03:51:48,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 47 transitions, 162 flow. Second operand 3 states. [2020-10-16 03:51:48,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:51:48,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 125 [2020-10-16 03:51:48,791 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:51:48,897 INFO L129 PetriNetUnfolder]: 340/625 cut-off events. [2020-10-16 03:51:48,898 INFO L130 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2020-10-16 03:51:48,900 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 625 events. 340/625 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2556 event pairs, 64 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 1246. Up to 222 conditions per place. [2020-10-16 03:51:48,903 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2020-10-16 03:51:48,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 222 flow [2020-10-16 03:51:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 03:51:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 03:51:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2020-10-16 03:51:48,906 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.648 [2020-10-16 03:51:48,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2020-10-16 03:51:48,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2020-10-16 03:51:48,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:51:48,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2020-10-16 03:51:48,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 03:51:48,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 03:51:48,909 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 03:51:48,909 INFO L185 Difference]: Start difference. First operand has 40 places, 47 transitions, 162 flow. Second operand 3 states and 243 transitions. [2020-10-16 03:51:48,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 222 flow [2020-10-16 03:51:48,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 206 flow, removed 2 selfloop flow, removed 2 redundant places. [2020-10-16 03:51:48,918 INFO L241 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2020-10-16 03:51:48,918 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2020-10-16 03:51:48,919 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2020-10-16 03:51:48,919 INFO L481 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2020-10-16 03:51:48,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 03:51:48,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 03:51:48,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:51:48 BasicIcfg [2020-10-16 03:51:48,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 03:51:48,930 INFO L168 Benchmark]: Toolchain (without parser) took 3189.83 ms. Allocated memory was 254.8 MB in the beginning and 360.7 MB in the end (delta: 105.9 MB). Free memory was 210.4 MB in the beginning and 208.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 108.1 MB. Max. memory is 14.2 GB. [2020-10-16 03:51:48,931 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 254.8 MB. Free memory is still 231.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 03:51:48,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 657.31 ms. Allocated memory was 254.8 MB in the beginning and 319.8 MB in the end (delta: 65.0 MB). Free memory was 210.4 MB in the beginning and 277.6 MB in the end (delta: -67.2 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. [2020-10-16 03:51:48,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 319.8 MB. Free memory was 277.6 MB in the beginning and 275.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 03:51:48,940 INFO L168 Benchmark]: Boogie Preprocessor took 35.41 ms. Allocated memory is still 319.8 MB. Free memory was 275.0 MB in the beginning and 272.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 03:51:48,945 INFO L168 Benchmark]: RCFGBuilder took 386.07 ms. Allocated memory is still 319.8 MB. Free memory was 272.5 MB in the beginning and 250.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 03:51:48,946 INFO L168 Benchmark]: TraceAbstraction took 2057.14 ms. Allocated memory was 319.8 MB in the beginning and 360.7 MB in the end (delta: 40.9 MB). Free memory was 250.7 MB in the beginning and 208.2 MB in the end (delta: 42.5 MB). Peak memory consumption was 83.4 MB. Max. memory is 14.2 GB. [2020-10-16 03:51:48,956 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 254.8 MB. Free memory is still 231.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 657.31 ms. Allocated memory was 254.8 MB in the beginning and 319.8 MB in the end (delta: 65.0 MB). Free memory was 210.4 MB in the beginning and 277.6 MB in the end (delta: -67.2 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 319.8 MB. Free memory was 277.6 MB in the beginning and 275.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 35.41 ms. Allocated memory is still 319.8 MB. Free memory was 275.0 MB in the beginning and 272.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 386.07 ms. Allocated memory is still 319.8 MB. Free memory was 272.5 MB in the beginning and 250.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2057.14 ms. Allocated memory was 319.8 MB in the beginning and 360.7 MB in the end (delta: 40.9 MB). Free memory was 250.7 MB in the beginning and 208.2 MB in the end (delta: 42.5 MB). Peak memory consumption was 83.4 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1206 VarBasedMoverChecksPositive, 59 VarBasedMoverChecksNegative, 31 SemBasedMoverChecksPositive, 28 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 245 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.8s, 61 PlacesBefore, 34 PlacesAfterwards, 81 TransitionsBefore, 50 TransitionsAfterwards, 2400 CoEnabledTransitionPairs, 4 FixpointIterations, 9 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 43 TotalNumberOfCompositions, 4233 MoverChecksTotal - PositiveResult [Line: 687]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 705]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 59 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 53 SDtfs, 12 SDslu, 0 SDs, 0 SdLazy, 58 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=4, 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 1240 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...