/usr/bin/java -Xmx8000000000 -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-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread-ext/15_dekker.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:57:08,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:57:08,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:57:08,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:57:08,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:57:08,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:57:08,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:57:08,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:57:08,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:57:08,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:57:08,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:57:08,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:57:08,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:57:08,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:57:08,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:57:08,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:57:08,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:57:08,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:57:08,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:57:08,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:57:08,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:57:08,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:57:08,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:57:08,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:57:08,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:57:08,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:57:08,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:57:08,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:57:08,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:57:08,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:57:08,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:57:08,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:57:08,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:57:08,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:57:08,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:57:08,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:57:08,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:57:08,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:57:08,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:57:08,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:57:08,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:57:08,985 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-FA-VariableLbe-McrStrategy.epf [2020-04-18 11:57:09,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:57:09,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:57:09,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:57:09,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:57:09,006 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:57:09,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:57:09,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:57:09,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:57:09,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:57:09,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:57:09,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:57:09,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:57:09,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:57:09,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:57:09,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:57:09,009 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:57:09,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:57:09,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:57:09,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:57:09,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:57:09,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:57:09,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:57:09,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:57:09,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:57:09,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:57:09,012 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:57:09,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:57:09,012 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 11:57:09,012 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:57:09,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:57:09,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:57:09,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:57:09,304 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:57:09,308 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:57:09,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:57:09,309 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:57:09,310 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/15_dekker.i [2020-04-18 11:57:09,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed26c4a2/e256683863f84ffb8c12de062a60728d/FLAG8d961017d [2020-04-18 11:57:09,882 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:57:09,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/15_dekker.i [2020-04-18 11:57:09,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed26c4a2/e256683863f84ffb8c12de062a60728d/FLAG8d961017d [2020-04-18 11:57:10,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed26c4a2/e256683863f84ffb8c12de062a60728d [2020-04-18 11:57:10,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:57:10,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:57:10,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:57:10,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:57:10,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:57:10,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca4cae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10, skipping insertion in model container [2020-04-18 11:57:10,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:57:10,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:57:10,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:57:10,696 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:57:10,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:57:10,817 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:57:10,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10 WrapperNode [2020-04-18 11:57:10,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:57:10,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:57:10,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:57:10,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:57:10,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:57:10,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:57:10,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:57:10,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:57:10,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (1/1) ... [2020-04-18 11:57:10,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:57:10,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:57:10,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:57:10,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:57:10,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (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 [2020-04-18 11:57:10,977 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-04-18 11:57:10,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-04-18 11:57:10,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:57:10,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:57:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:57:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:57:10,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:57:10,980 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 11:57:11,310 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:57:11,310 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-04-18 11:57:11,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:57:11 BoogieIcfgContainer [2020-04-18 11:57:11,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:57:11,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:57:11,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:57:11,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:57:11,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:57:10" (1/3) ... [2020-04-18 11:57:11,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2967130b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:57:11, skipping insertion in model container [2020-04-18 11:57:11,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:57:10" (2/3) ... [2020-04-18 11:57:11,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2967130b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:57:11, skipping insertion in model container [2020-04-18 11:57:11,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:57:11" (3/3) ... [2020-04-18 11:57:11,322 INFO L109 eAbstractionObserver]: Analyzing ICFG 15_dekker.i [2020-04-18 11:57:11,331 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:57:11,331 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:57:11,338 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-04-18 11:57:11,339 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:57:11,358 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,358 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,358 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,359 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,360 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,361 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,364 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,364 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,365 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,365 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:57:11,384 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-04-18 11:57:11,400 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:57:11,400 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:57:11,401 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:57:11,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:57:11,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:57:11,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:57:11,401 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:57:11,401 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:57:11,414 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 65 transitions, 135 flow [2020-04-18 11:57:11,416 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 65 transitions, 135 flow [2020-04-18 11:57:11,452 INFO L129 PetriNetUnfolder]: 12/64 cut-off events. [2020-04-18 11:57:11,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:57:11,459 INFO L80 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 64 events. 12/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 52. Up to 3 conditions per place. [2020-04-18 11:57:11,462 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 65 transitions, 135 flow [2020-04-18 11:57:11,480 INFO L129 PetriNetUnfolder]: 12/64 cut-off events. [2020-04-18 11:57:11,480 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:57:11,481 INFO L80 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 64 events. 12/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 52. Up to 3 conditions per place. [2020-04-18 11:57:11,484 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1302 [2020-04-18 11:57:11,485 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 11:57:12,272 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4161 [2020-04-18 11:57:12,272 INFO L214 etLargeBlockEncoding]: Total number of compositions: 33 [2020-04-18 11:57:12,277 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 38 transitions, 81 flow [2020-04-18 11:57:12,307 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 170 states. [2020-04-18 11:57:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-04-18 11:57:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-04-18 11:57:12,317 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:57:12,317 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-04-18 11:57:12,318 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:57:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash 257581824, now seen corresponding path program 1 times [2020-04-18 11:57:12,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:57:12,335 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [295978338] [2020-04-18 11:57:12,353 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:12,367 INFO L259 McrAutomatonBuilder]: Finished intersection with 6 states and 5 transitions. [2020-04-18 11:57:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-04-18 11:57:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-04-18 11:57:12,371 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:57:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,373 INFO L82 PathProgramCache]: Analyzing trace with hash 257581824, now seen corresponding path program 2 times [2020-04-18 11:57:12,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:57:12,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565440197] [2020-04-18 11:57:12,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:57:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:57:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:57:12,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565440197] [2020-04-18 11:57:12,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:57:12,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:57:12,534 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:57:12,535 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:12,536 INFO L259 McrAutomatonBuilder]: Finished intersection with 6 states and 5 transitions. [2020-04-18 11:57:12,536 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:57:12,539 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:57:12,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-04-18 11:57:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 11:57:12,545 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 2 states. [2020-04-18 11:57:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:12,549 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2020-04-18 11:57:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2020-04-18 11:57:12,549 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:57:12,550 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [295978338] [2020-04-18 11:57:12,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:57:12,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:57:12,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [295978338] [2020-04-18 11:57:12,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-04-18 11:57:12,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:57:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-04-18 11:57:12,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 11:57:12,556 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 2 states. [2020-04-18 11:57:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:12,569 INFO L93 Difference]: Finished difference Result 170 states and 390 transitions. [2020-04-18 11:57:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-04-18 11:57:12,570 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-04-18 11:57:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:57:12,583 INFO L225 Difference]: With dead ends: 170 [2020-04-18 11:57:12,583 INFO L226 Difference]: Without dead ends: 155 [2020-04-18 11:57:12,585 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 11:57:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-18 11:57:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-04-18 11:57:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-04-18 11:57:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 360 transitions. [2020-04-18 11:57:12,645 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 360 transitions. Word has length 5 [2020-04-18 11:57:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:57:12,645 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 360 transitions. [2020-04-18 11:57:12,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-04-18 11:57:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 360 transitions. [2020-04-18 11:57:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:57:12,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:57:12,646 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:57:12,647 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:57:12,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,647 INFO L82 PathProgramCache]: Analyzing trace with hash -604925666, now seen corresponding path program 1 times [2020-04-18 11:57:12,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:57:12,648 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1564429109] [2020-04-18 11:57:12,649 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:12,651 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:57:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 11:57:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:57:12,654 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:57:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,655 INFO L82 PathProgramCache]: Analyzing trace with hash -604925666, now seen corresponding path program 2 times [2020-04-18 11:57:12,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:57:12,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767094508] [2020-04-18 11:57:12,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:57:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:57:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:57:12,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767094508] [2020-04-18 11:57:12,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:57:12,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:57:12,739 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:57:12,739 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:12,740 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:57:12,740 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:57:12,750 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:57:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:57:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:57:12,751 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-04-18 11:57:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:12,756 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 11:57:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 11:57:12,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:57:12,758 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1564429109] [2020-04-18 11:57:12,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:57:12,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:57:12,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1564429109] [2020-04-18 11:57:12,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 11:57:12,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:57:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:57:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:57:12,761 INFO L87 Difference]: Start difference. First operand 155 states and 360 transitions. Second operand 3 states. [2020-04-18 11:57:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:12,809 INFO L93 Difference]: Finished difference Result 154 states and 341 transitions. [2020-04-18 11:57:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 11:57:12,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-04-18 11:57:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:57:12,813 INFO L225 Difference]: With dead ends: 154 [2020-04-18 11:57:12,813 INFO L226 Difference]: Without dead ends: 130 [2020-04-18 11:57:12,817 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:57:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-18 11:57:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2020-04-18 11:57:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-18 11:57:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 278 transitions. [2020-04-18 11:57:12,847 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 278 transitions. Word has length 6 [2020-04-18 11:57:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:57:12,847 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 278 transitions. [2020-04-18 11:57:12,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 11:57:12,848 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 278 transitions. [2020-04-18 11:57:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:57:12,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:57:12,849 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:57:12,849 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:57:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash -604373151, now seen corresponding path program 1 times [2020-04-18 11:57:12,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:57:12,850 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [407144561] [2020-04-18 11:57:12,852 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:12,852 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:57:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 11:57:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:57:12,853 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:57:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -604373151, now seen corresponding path program 2 times [2020-04-18 11:57:12,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:57:12,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065232758] [2020-04-18 11:57:12,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:57:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:57:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:57:12,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065232758] [2020-04-18 11:57:12,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:57:12,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:57:12,923 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:57:12,923 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:12,924 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:57:12,924 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:57:12,929 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:57:12,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:57:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:57:12,930 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-04-18 11:57:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:12,932 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 11:57:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 11:57:12,932 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:57:12,932 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [407144561] [2020-04-18 11:57:12,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:57:12,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:57:12,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [407144561] [2020-04-18 11:57:12,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 11:57:12,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:57:12,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:57:12,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:57:12,934 INFO L87 Difference]: Start difference. First operand 122 states and 278 transitions. Second operand 3 states. [2020-04-18 11:57:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:12,953 INFO L93 Difference]: Finished difference Result 116 states and 257 transitions. [2020-04-18 11:57:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 11:57:12,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-04-18 11:57:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:57:12,955 INFO L225 Difference]: With dead ends: 116 [2020-04-18 11:57:12,955 INFO L226 Difference]: Without dead ends: 83 [2020-04-18 11:57:12,955 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:57:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-18 11:57:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-04-18 11:57:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-18 11:57:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 185 transitions. [2020-04-18 11:57:12,963 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 185 transitions. Word has length 6 [2020-04-18 11:57:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:57:12,963 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 185 transitions. [2020-04-18 11:57:12,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 11:57:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 185 transitions. [2020-04-18 11:57:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:57:12,964 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:57:12,964 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:57:12,965 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:57:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash 342967710, now seen corresponding path program 1 times [2020-04-18 11:57:12,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:57:12,965 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1016697530] [2020-04-18 11:57:12,966 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:12,966 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 11:57:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:57:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:57:12,967 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:57:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash 342492510, now seen corresponding path program 2 times [2020-04-18 11:57:12,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:57:12,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129865790] [2020-04-18 11:57:12,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:57:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:57:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:57:13,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129865790] [2020-04-18 11:57:13,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:57:13,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:57:13,008 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:57:13,008 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:13,009 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 20 transitions. [2020-04-18 11:57:13,009 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:57:13,018 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:57:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:57:13,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:57:13,019 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-04-18 11:57:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:13,022 INFO L93 Difference]: Finished difference Result 24 states and 34 transitions. [2020-04-18 11:57:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2020-04-18 11:57:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:57:13,023 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:57:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash 342967710, now seen corresponding path program 3 times [2020-04-18 11:57:13,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:57:13,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70751564] [2020-04-18 11:57:13,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:57:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:57:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:57:13,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70751564] [2020-04-18 11:57:13,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:57:13,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:57:13,054 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:57:13,055 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:13,056 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 14 transitions. [2020-04-18 11:57:13,056 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:57:13,070 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:57:13,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:57:13,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 11:57:13,071 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 3 states. [2020-04-18 11:57:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:13,074 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2020-04-18 11:57:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-04-18 11:57:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:57:13,076 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:57:13,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:57:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash -321203524, now seen corresponding path program 4 times [2020-04-18 11:57:13,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:57:13,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823532041] [2020-04-18 11:57:13,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:57:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:57:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:57:13,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823532041] [2020-04-18 11:57:13,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:57:13,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:57:13,117 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:57:13,118 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:57:13,118 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 14 transitions. [2020-04-18 11:57:13,119 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:57:13,124 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:57:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:57:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:57:13,125 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 3 states. [2020-04-18 11:57:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:13,135 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-04-18 11:57:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2020-04-18 11:57:13,136 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:57:13,136 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1016697530] [2020-04-18 11:57:13,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:57:13,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:57:13,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1016697530] [2020-04-18 11:57:13,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 11:57:13,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:57:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:57:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:57:13,139 INFO L87 Difference]: Start difference. First operand 83 states and 185 transitions. Second operand 5 states. [2020-04-18 11:57:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:57:13,215 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-04-18 11:57:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 11:57:13,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-04-18 11:57:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:57:13,216 INFO L225 Difference]: With dead ends: 62 [2020-04-18 11:57:13,216 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 11:57:13,217 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:57:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 11:57:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 11:57:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 11:57:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 11:57:13,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-04-18 11:57:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:57:13,218 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 11:57:13,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 11:57:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 11:57:13,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:57:13,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 11:57:13 BasicIcfg [2020-04-18 11:57:13,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 11:57:13,225 INFO L168 Benchmark]: Toolchain (without parser) took 3097.73 ms. Allocated memory was 138.9 MB in the beginning and 235.4 MB in the end (delta: 96.5 MB). Free memory was 102.7 MB in the beginning and 96.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 102.3 MB. Max. memory is 7.1 GB. [2020-04-18 11:57:13,226 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-04-18 11:57:13,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.46 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 162.2 MB in the end (delta: -61.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-04-18 11:57:13,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.28 ms. Allocated memory is still 202.4 MB. Free memory was 162.2 MB in the beginning and 160.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 11:57:13,228 INFO L168 Benchmark]: Boogie Preprocessor took 24.24 ms. Allocated memory is still 202.4 MB. Free memory was 160.2 MB in the beginning and 158.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-18 11:57:13,229 INFO L168 Benchmark]: RCFGBuilder took 401.74 ms. Allocated memory is still 202.4 MB. Free memory was 158.9 MB in the beginning and 138.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-04-18 11:57:13,230 INFO L168 Benchmark]: TraceAbstraction took 1906.76 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 138.8 MB in the beginning and 96.9 MB in the end (delta: 42.0 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. [2020-04-18 11:57:13,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 667.46 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 162.2 MB in the end (delta: -61.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.28 ms. Allocated memory is still 202.4 MB. Free memory was 162.2 MB in the beginning and 160.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.24 ms. Allocated memory is still 202.4 MB. Free memory was 160.2 MB in the beginning and 158.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.74 ms. Allocated memory is still 202.4 MB. Free memory was 158.9 MB in the beginning and 138.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1906.76 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 138.8 MB in the beginning and 96.9 MB in the end (delta: 42.0 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.8s, 57 ProgramPointsBefore, 31 ProgramPointsAfterwards, 65 TransitionsBefore, 38 TransitionsAfterwards, 1302 CoEnabledTransitionPairs, 6 FixpointIterations, 10 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 636 VarBasedMoverChecksPositive, 27 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 4161 CheckedPairsTotal, 33 TotalNumberOfCompositions - PositiveResult [Line: 686]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 701]: 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, 54 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 145 SDtfs, 93 SDslu, 69 SDs, 0 SdLazy, 31 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...