/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:21:55,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:21:55,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:21:55,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 14:21:55,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 14:21:55,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 14:21:55,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 14:21:55,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 14:21:55,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 14:21:55,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 14:21:55,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 14:21:55,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 14:21:55,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 14:21:55,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 14:21:55,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 14:21:55,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 14:21:55,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 14:21:55,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 14:21:55,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 14:21:55,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 14:21:55,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 14:21:55,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 14:21:55,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 14:21:55,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 14:21:55,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-10 14:21:55,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-10 14:21:55,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-10 14:21:55,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-10 14:21:55,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-10 14:21:55,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-10 14:21:55,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 14:21:55,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 14:21:55,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 14:21:55,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 14:21:55,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 14:21:55,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 14:21:55,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 14:21:55,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 14:21:55,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 14:21:55,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 14:21:55,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 14:21:55,428 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-NoLbe.epf [2021-06-10 14:21:55,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:21:55,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:21:55,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:21:55,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:21:55,459 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:21:55,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:21:55,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:21:55,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:21:55,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:21:55,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:21:55,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:21:55,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:21:55,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:21:55,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:21:55,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:21:55,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:21:55,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:21:55,693 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-10 14:21:55,694 INFO L275 PluginConnector]: CDTParser initialized [2021-06-10 14:21:55,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c [2021-06-10 14:21:55,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb5dea74/25f09689953546d5ad67585aa722c23d/FLAGa4228ef4b [2021-06-10 14:21:56,059 INFO L306 CDTParser]: Found 1 translation units. [2021-06-10 14:21:56,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/pthreadMutex01-safe.c [2021-06-10 14:21:56,059 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-10 14:21:56,059 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-10 14:21:56,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb5dea74/25f09689953546d5ad67585aa722c23d/FLAGa4228ef4b [2021-06-10 14:21:56,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb5dea74/25f09689953546d5ad67585aa722c23d [2021-06-10 14:21:56,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:21:56,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-10 14:21:56,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-10 14:21:56,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-10 14:21:56,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-10 14:21:56,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79752a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56, skipping insertion in model container [2021-06-10 14:21:56,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-10 14:21:56,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-10 14:21:56,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-10 14:21:56,648 INFO L203 MainTranslator]: Completed pre-run [2021-06-10 14:21:56,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-10 14:21:56,677 INFO L208 MainTranslator]: Completed translation [2021-06-10 14:21:56,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56 WrapperNode [2021-06-10 14:21:56,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-10 14:21:56,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:21:56,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:21:56,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:21:56,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:21:56,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:21:56,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:21:56,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:21:56,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (1/1) ... [2021-06-10 14:21:56,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:21:56,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:21:56,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:21:56,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:21:56,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (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 [2021-06-10 14:21:56,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-06-10 14:21:56,822 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-10 14:21:56,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:21:56,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:21:56,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-10 14:21:56,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-10 14:21:56,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:21:56,959 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-10 14:21:56,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:21:56 BoogieIcfgContainer [2021-06-10 14:21:56,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:21:56,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:21:56,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:21:56,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:21:56,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.06 02:21:56" (1/3) ... [2021-06-10 14:21:56,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9444d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:21:56, skipping insertion in model container [2021-06-10 14:21:56,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.06 02:21:56" (2/3) ... [2021-06-10 14:21:56,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9444d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:21:56, skipping insertion in model container [2021-06-10 14:21:56,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:21:56" (3/3) ... [2021-06-10 14:21:56,967 INFO L111 eAbstractionObserver]: Analyzing ICFG pthreadMutex01-safe.c [2021-06-10 14:21:56,971 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:21:56,974 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-06-10 14:21:56,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:21:56,998 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:21:56,998 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:21:56,998 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:21:56,999 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:21:56,999 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:21:56,999 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:21:56,999 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:21:56,999 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:21:57,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 11 transitions, 22 flow [2021-06-10 14:21:57,015 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-06-10 14:21:57,015 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:21:57,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12 conditions, 11 events. 1/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:21:57,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 11 places, 11 transitions, 22 flow [2021-06-10 14:21:57,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 8 places, 8 transitions, 16 flow [2021-06-10 14:21:57,019 INFO L129 PetriNetUnfolder]: 1/6 cut-off events. [2021-06-10 14:21:57,019 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:21:57,019 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:21:57,020 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-10 14:21:57,020 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:21:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:21:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2021-06-10 14:21:57,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:21:57,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214713460] [2021-06-10 14:21:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:21:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:21:57,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:21:57,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:21:57,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:21:57,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:21:57,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:21:57,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:21:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:21:57,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214713460] [2021-06-10 14:21:57,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:21:57,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:21:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562410931] [2021-06-10 14:21:57,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:21:57,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:21:57,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:21:57,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:21:57,171 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 11 [2021-06-10 14:21:57,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 8 places, 8 transitions, 16 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:21:57,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 11 [2021-06-10 14:21:57,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:21:57,185 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 14:21:57,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:21:57,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9 conditions, 5 events. 0/5 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/5 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:21:57,186 INFO L132 encePairwiseOnDemand]: 9/11 looper letters, 1 selfloop transitions, 1 changer transitions 0/5 dead transitions. [2021-06-10 14:21:57,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 8 places, 5 transitions, 14 flow [2021-06-10 14:21:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:21:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:21:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2021-06-10 14:21:57,193 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2021-06-10 14:21:57,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 21 transitions. [2021-06-10 14:21:57,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 21 transitions. [2021-06-10 14:21:57,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:21:57,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 21 transitions. [2021-06-10 14:21:57,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,225 INFO L185 Difference]: Start difference. First operand has 8 places, 8 transitions, 16 flow. Second operand 3 states and 21 transitions. [2021-06-10 14:21:57,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 8 places, 5 transitions, 14 flow [2021-06-10 14:21:57,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 8 places, 5 transitions, 14 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 14:21:57,227 INFO L241 Difference]: Finished difference. Result has 8 places, 5 transitions, 12 flow [2021-06-10 14:21:57,228 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=11, PETRI_DIFFERENCE_MINUEND_FLOW=10, PETRI_DIFFERENCE_MINUEND_PLACES=6, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=12, PETRI_PLACES=8, PETRI_TRANSITIONS=5} [2021-06-10 14:21:57,229 INFO L343 CegarLoopForPetriNet]: 8 programPoint places, 0 predicate places. [2021-06-10 14:21:57,229 INFO L480 AbstractCegarLoop]: Abstraction has has 8 places, 5 transitions, 12 flow [2021-06-10 14:21:57,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,229 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:21:57,229 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-06-10 14:21:57,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:21:57,229 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:21:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:21:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash 28697735, now seen corresponding path program 1 times [2021-06-10 14:21:57,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:21:57,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495917116] [2021-06-10 14:21:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:21:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:21:57,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:21:57,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:21:57,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:21:57,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:21:57,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:21:57,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:21:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:21:57,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495917116] [2021-06-10 14:21:57,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:21:57,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:21:57,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525864176] [2021-06-10 14:21:57,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:21:57,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:21:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:21:57,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:21:57,272 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 11 [2021-06-10 14:21:57,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 8 places, 5 transitions, 12 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:21:57,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 11 [2021-06-10 14:21:57,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:21:57,276 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2021-06-10 14:21:57,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:21:57,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9 conditions, 3 events. 0/3 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/4 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:21:57,276 INFO L132 encePairwiseOnDemand]: 9/11 looper letters, 0 selfloop transitions, 0 changer transitions 3/3 dead transitions. [2021-06-10 14:21:57,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 8 places, 3 transitions, 12 flow [2021-06-10 14:21:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:21:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:21:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2021-06-10 14:21:57,277 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2021-06-10 14:21:57,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 21 transitions. [2021-06-10 14:21:57,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 21 transitions. [2021-06-10 14:21:57,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:21:57,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 21 transitions. [2021-06-10 14:21:57,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,278 INFO L185 Difference]: Start difference. First operand has 8 places, 5 transitions, 12 flow. Second operand 3 states and 21 transitions. [2021-06-10 14:21:57,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 8 places, 3 transitions, 12 flow [2021-06-10 14:21:57,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 7 places, 3 transitions, 11 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 14:21:57,281 INFO L241 Difference]: Finished difference. Result has 7 places, 0 transitions, 0 flow [2021-06-10 14:21:57,281 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=11, PETRI_DIFFERENCE_MINUEND_FLOW=7, PETRI_DIFFERENCE_MINUEND_PLACES=5, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=7, PETRI_TRANSITIONS=0} [2021-06-10 14:21:57,282 INFO L343 CegarLoopForPetriNet]: 8 programPoint places, -1 predicate places. [2021-06-10 14:21:57,282 INFO L480 AbstractCegarLoop]: Abstraction has has 7 places, 0 transitions, 0 flow [2021-06-10 14:21:57,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:21:57,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:21:57,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:21:57 BoogieIcfgContainer [2021-06-10 14:21:57,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:21:57,290 INFO L168 Benchmark]: Toolchain (without parser) took 806.37 ms. Allocated memory is still 356.5 MB. Free memory was 318.5 MB in the beginning and 298.6 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.0 GB. [2021-06-10 14:21:57,290 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 356.5 MB. Free memory is still 336.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:21:57,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.00 ms. Allocated memory is still 356.5 MB. Free memory was 318.4 MB in the beginning and 338.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.0 GB. [2021-06-10 14:21:57,293 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.99 ms. Allocated memory is still 356.5 MB. Free memory was 338.4 MB in the beginning and 337.4 MB in the end (delta: 969.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:21:57,293 INFO L168 Benchmark]: Boogie Preprocessor took 20.76 ms. Allocated memory is still 356.5 MB. Free memory was 337.4 MB in the beginning and 336.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:21:57,294 INFO L168 Benchmark]: RCFGBuilder took 234.44 ms. Allocated memory is still 356.5 MB. Free memory was 336.3 MB in the beginning and 322.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-10 14:21:57,295 INFO L168 Benchmark]: TraceAbstraction took 325.93 ms. Allocated memory is still 356.5 MB. Free memory was 322.7 MB in the beginning and 298.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-06-10 14:21:57,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 356.5 MB. Free memory is still 336.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 195.00 ms. Allocated memory is still 356.5 MB. Free memory was 318.4 MB in the beginning and 338.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.99 ms. Allocated memory is still 356.5 MB. Free memory was 338.4 MB in the beginning and 337.4 MB in the end (delta: 969.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.76 ms. Allocated memory is still 356.5 MB. Free memory was 337.4 MB in the beginning and 336.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 234.44 ms. Allocated memory is still 356.5 MB. Free memory was 336.3 MB in the beginning and 322.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 325.93 ms. Allocated memory is still 356.5 MB. Free memory was 322.7 MB in the beginning and 298.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 286.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 71.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.2ms SsaConstructionTime, 33.3ms SatisfiabilityAnalysisTime, 88.1ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 21 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...