/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 21:38:31,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 21:38:31,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 21:38:32,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 21:38:32,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 21:38:32,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 21:38:32,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 21:38:32,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 21:38:32,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 21:38:32,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 21:38:32,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 21:38:32,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 21:38:32,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 21:38:32,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 21:38:32,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 21:38:32,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 21:38:32,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 21:38:32,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 21:38:32,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 21:38:32,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 21:38:32,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 21:38:32,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 21:38:32,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 21:38:32,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 21:38:32,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-21 21:38:32,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 21:38:32,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 21:38:32,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 21:38:32,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-21 21:38:32,159 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 21:38:32,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 21:38:32,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 21:38:32,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 21:38:32,161 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 21:38:32,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 21:38:32,162 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 21:38:32,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 21:38:32,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 21:38:32,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 21:38:32,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 21:38:32,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 21:38:32,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 21:38:32,165 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 21:38:32,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 21:38:32,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 21:38:32,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 21:38:32,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 21:38:32,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 21:38:32,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 21:38:32,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 21:38:32,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:38:32,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 21:38:32,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-21 21:38:32,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 21:38:32,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 21:38:32,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 21:38:32,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 21:38:32,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-21 21:38:32,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-21 21:38:32,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 21:38:32,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 21:38:32,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 21:38:32,552 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 21:38:32,552 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 21:38:32,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2020-10-21 21:38:32,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc73c207d/f59a5180d60f469eb165d3d93262528c/FLAG0e1198955 [2020-10-21 21:38:33,192 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 21:38:33,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2020-10-21 21:38:33,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc73c207d/f59a5180d60f469eb165d3d93262528c/FLAG0e1198955 [2020-10-21 21:38:33,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc73c207d/f59a5180d60f469eb165d3d93262528c [2020-10-21 21:38:33,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 21:38:33,502 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 21:38:33,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 21:38:33,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 21:38:33,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 21:38:33,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:38:33" (1/1) ... [2020-10-21 21:38:33,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6a5181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:33, skipping insertion in model container [2020-10-21 21:38:33,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:38:33" (1/1) ... [2020-10-21 21:38:33,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 21:38:33,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 21:38:34,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:38:34,034 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 21:38:34,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:38:34,230 INFO L208 MainTranslator]: Completed translation [2020-10-21 21:38:34,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34 WrapperNode [2020-10-21 21:38:34,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 21:38:34,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 21:38:34,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 21:38:34,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 21:38:34,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 21:38:34,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 21:38:34,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 21:38:34,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 21:38:34,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... [2020-10-21 21:38:34,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 21:38:34,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 21:38:34,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 21:38:34,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 21:38:34,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:38:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-21 21:38:34,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-21 21:38:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 21:38:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 21:38:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 21:38:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 21:38:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 21:38:34,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 21:38:34,412 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 21:38:34,899 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 21:38:34,899 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 21:38:34,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:38:34 BoogieIcfgContainer [2020-10-21 21:38:34,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 21:38:34,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 21:38:34,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 21:38:34,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 21:38:34,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 09:38:33" (1/3) ... [2020-10-21 21:38:34,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30044a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:38:34, skipping insertion in model container [2020-10-21 21:38:34,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:38:34" (2/3) ... [2020-10-21 21:38:34,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30044a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:38:34, skipping insertion in model container [2020-10-21 21:38:34,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:38:34" (3/3) ... [2020-10-21 21:38:34,911 INFO L111 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2020-10-21 21:38:34,924 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 21:38:34,925 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-21 21:38:34,933 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 21:38:34,934 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 21:38:34,955 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,956 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,956 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,956 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,956 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,956 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,957 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,957 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,961 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,961 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,961 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,961 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,962 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,962 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:38:34,965 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 21:38:34,977 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-21 21:38:34,995 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 21:38:34,996 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 21:38:34,996 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-21 21:38:34,996 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 21:38:34,996 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 21:38:34,996 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 21:38:34,996 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 21:38:34,996 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 21:38:35,007 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-21 21:38:35,010 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 48 transitions, 101 flow [2020-10-21 21:38:35,012 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 48 transitions, 101 flow [2020-10-21 21:38:35,014 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 101 flow [2020-10-21 21:38:35,049 INFO L129 PetriNetUnfolder]: 2/47 cut-off events. [2020-10-21 21:38:35,050 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 21:38:35,054 INFO L80 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 47 events. 2/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2020-10-21 21:38:35,056 INFO L116 LiptonReduction]: Number of co-enabled transitions 300 [2020-10-21 21:38:36,209 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-21 21:38:36,391 INFO L131 LiptonReduction]: Checked pairs total: 566 [2020-10-21 21:38:36,391 INFO L133 LiptonReduction]: Total number of compositions: 47 [2020-10-21 21:38:36,398 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 11 transitions, 27 flow [2020-10-21 21:38:36,408 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 20 states. [2020-10-21 21:38:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-21 21:38:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-21 21:38:36,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:38:36,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-21 21:38:36,419 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:38:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:38:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 240241942, now seen corresponding path program 1 times [2020-10-21 21:38:36,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:38:36,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122094333] [2020-10-21 21:38:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:38:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:38:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:38:36,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122094333] [2020-10-21 21:38:36,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:38:36,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 21:38:36,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633204576] [2020-10-21 21:38:36,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-21 21:38:36,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:38:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-21 21:38:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-21 21:38:36,643 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-10-21 21:38:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:38:36,685 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2020-10-21 21:38:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-21 21:38:36,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-10-21 21:38:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:38:36,698 INFO L225 Difference]: With dead ends: 21 [2020-10-21 21:38:36,699 INFO L226 Difference]: Without dead ends: 10 [2020-10-21 21:38:36,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-21 21:38:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-21 21:38:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-21 21:38:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-21 21:38:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-10-21 21:38:36,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2020-10-21 21:38:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:38:36,740 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-10-21 21:38:36,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-21 21:38:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-10-21 21:38:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-21 21:38:36,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:38:36,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:38:36,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 21:38:36,742 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:38:36,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:38:36,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1085621578, now seen corresponding path program 1 times [2020-10-21 21:38:36,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:38:36,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339445801] [2020-10-21 21:38:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:38:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:38:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:38:36,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339445801] [2020-10-21 21:38:36,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:38:36,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:38:36,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177767481] [2020-10-21 21:38:36,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-21 21:38:36,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:38:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-21 21:38:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-21 21:38:36,880 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-10-21 21:38:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:38:36,899 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-10-21 21:38:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-21 21:38:36,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-21 21:38:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:38:36,901 INFO L225 Difference]: With dead ends: 10 [2020-10-21 21:38:36,901 INFO L226 Difference]: Without dead ends: 9 [2020-10-21 21:38:36,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-21 21:38:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-10-21 21:38:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-21 21:38:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-21 21:38:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-10-21 21:38:36,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-10-21 21:38:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:38:36,905 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-10-21 21:38:36,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-21 21:38:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-10-21 21:38:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-21 21:38:36,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:38:36,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:38:36,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 21:38:36,906 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:38:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:38:36,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1055753698, now seen corresponding path program 2 times [2020-10-21 21:38:36,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:38:36,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853280571] [2020-10-21 21:38:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:38:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:38:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:38:36,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853280571] [2020-10-21 21:38:36,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:38:36,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:38:36,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380092640] [2020-10-21 21:38:36,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 21:38:36,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:38:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 21:38:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:38:36,955 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2020-10-21 21:38:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:38:36,961 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2020-10-21 21:38:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 21:38:36,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-21 21:38:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:38:36,962 INFO L225 Difference]: With dead ends: 5 [2020-10-21 21:38:36,962 INFO L226 Difference]: Without dead ends: 0 [2020-10-21 21:38:36,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:38:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-21 21:38:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-21 21:38:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-21 21:38:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-21 21:38:36,964 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-10-21 21:38:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:38:36,964 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-21 21:38:36,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 21:38:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-21 21:38:36,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-21 21:38:36,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 21:38:36,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 09:38:36 BasicIcfg [2020-10-21 21:38:36,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 21:38:36,971 INFO L168 Benchmark]: Toolchain (without parser) took 3474.10 ms. Allocated memory was 138.9 MB in the beginning and 249.6 MB in the end (delta: 110.6 MB). Free memory was 100.2 MB in the beginning and 170.8 MB in the end (delta: -70.6 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:36,972 INFO L168 Benchmark]: CDTParser took 3.50 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-21 21:38:36,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.39 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 99.4 MB in the beginning and 158.2 MB in the end (delta: -58.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:36,974 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.79 ms. Allocated memory is still 201.9 MB. Free memory was 158.2 MB in the beginning and 156.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:36,975 INFO L168 Benchmark]: Boogie Preprocessor took 26.71 ms. Allocated memory is still 201.9 MB. Free memory was 156.2 MB in the beginning and 154.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:36,976 INFO L168 Benchmark]: RCFGBuilder took 568.03 ms. Allocated memory is still 201.9 MB. Free memory was 154.2 MB in the beginning and 123.7 MB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:36,977 INFO L168 Benchmark]: TraceAbstraction took 2065.44 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 123.7 MB in the beginning and 170.8 MB in the end (delta: -47.2 MB). Peak memory consumption was 542.8 kB. Max. memory is 7.1 GB. [2020-10-21 21:38:36,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.50 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 729.39 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 99.4 MB in the beginning and 158.2 MB in the end (delta: -58.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 73.79 ms. Allocated memory is still 201.9 MB. Free memory was 158.2 MB in the beginning and 156.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.71 ms. Allocated memory is still 201.9 MB. Free memory was 156.2 MB in the beginning and 154.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 568.03 ms. Allocated memory is still 201.9 MB. Free memory was 154.2 MB in the beginning and 123.7 MB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2065.44 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 123.7 MB in the beginning and 170.8 MB in the end (delta: -47.2 MB). Peak memory consumption was 542.8 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 194 VarBasedMoverChecksPositive, 33 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 27 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 50 PlacesBefore, 14 PlacesAfterwards, 48 TransitionsBefore, 11 TransitionsAfterwards, 300 CoEnabledTransitionPairs, 8 FixpointIterations, 14 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 47 TotalNumberOfCompositions, 566 MoverChecksTotal - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 18 SDtfs, 6 SDslu, 7 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 156 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...