./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/17_szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/17_szymanski.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c051ca3a402db468e0ce05dfc38d0dfe3d0c9a7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 00:09:35,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 00:09:35,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 00:09:35,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 00:09:35,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 00:09:35,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 00:09:35,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 00:09:35,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 00:09:35,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 00:09:35,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 00:09:35,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 00:09:35,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 00:09:35,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 00:09:35,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 00:09:35,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 00:09:35,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 00:09:35,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 00:09:35,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 00:09:35,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 00:09:35,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 00:09:35,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 00:09:35,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 00:09:35,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 00:09:35,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 00:09:35,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 00:09:35,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 00:09:35,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 00:09:35,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 00:09:35,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 00:09:35,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 00:09:35,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 00:09:35,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 00:09:35,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 00:09:35,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 00:09:35,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 00:09:35,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 00:09:35,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 00:09:35,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 00:09:35,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 00:09:35,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 00:09:35,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 00:09:35,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 00:09:36,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 00:09:36,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 00:09:36,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 00:09:36,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 00:09:36,033 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 00:09:36,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 00:09:36,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 00:09:36,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 00:09:36,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 00:09:36,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 00:09:36,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 00:09:36,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 00:09:36,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 00:09:36,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 00:09:36,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 00:09:36,037 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 00:09:36,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 00:09:36,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 00:09:36,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 00:09:36,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 00:09:36,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 00:09:36,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:09:36,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 00:09:36,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 00:09:36,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 00:09:36,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 00:09:36,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 00:09:36,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 00:09:36,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 00:09:36,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c051ca3a402db468e0ce05dfc38d0dfe3d0c9a7 [2020-10-26 00:09:36,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 00:09:36,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 00:09:36,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 00:09:36,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 00:09:36,508 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 00:09:36,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/17_szymanski.i [2020-10-26 00:09:36,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713ee9347/67bc72fafaf54aae811a52b25d26c588/FLAG03c2f92ff [2020-10-26 00:09:37,284 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 00:09:37,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/17_szymanski.i [2020-10-26 00:09:37,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713ee9347/67bc72fafaf54aae811a52b25d26c588/FLAG03c2f92ff [2020-10-26 00:09:37,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713ee9347/67bc72fafaf54aae811a52b25d26c588 [2020-10-26 00:09:37,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 00:09:37,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 00:09:37,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 00:09:37,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 00:09:37,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 00:09:37,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:09:37" (1/1) ... [2020-10-26 00:09:37,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4abaf92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:37, skipping insertion in model container [2020-10-26 00:09:37,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:09:37" (1/1) ... [2020-10-26 00:09:37,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 00:09:37,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 00:09:38,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:09:38,104 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 00:09:38,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:09:38,297 INFO L208 MainTranslator]: Completed translation [2020-10-26 00:09:38,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38 WrapperNode [2020-10-26 00:09:38,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 00:09:38,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 00:09:38,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 00:09:38,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 00:09:38,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 00:09:38,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 00:09:38,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 00:09:38,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 00:09:38,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (1/1) ... [2020-10-26 00:09:38,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 00:09:38,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 00:09:38,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 00:09:38,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 00:09:38,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (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 [2020-10-26 00:09:38,484 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-26 00:09:38,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-26 00:09:38,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 00:09:38,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 00:09:38,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 00:09:38,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 00:09:38,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 00:09:38,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 00:09:38,488 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-26 00:09:38,910 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 00:09:38,910 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-26 00:09:38,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:09:38 BoogieIcfgContainer [2020-10-26 00:09:38,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 00:09:38,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 00:09:38,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 00:09:38,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 00:09:38,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 12:09:37" (1/3) ... [2020-10-26 00:09:38,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19022a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:09:38, skipping insertion in model container [2020-10-26 00:09:38,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:38" (2/3) ... [2020-10-26 00:09:38,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19022a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:09:38, skipping insertion in model container [2020-10-26 00:09:38,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:09:38" (3/3) ... [2020-10-26 00:09:38,922 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2020-10-26 00:09:38,937 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-26 00:09:38,937 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 00:09:38,948 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-26 00:09:38,949 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-26 00:09:38,979 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,979 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,980 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,980 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,981 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,981 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,982 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,982 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,983 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,983 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,986 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,987 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,987 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,987 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,988 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,988 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:38,995 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-26 00:09:39,009 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-26 00:09:39,036 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 00:09:39,037 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 00:09:39,037 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 00:09:39,038 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 00:09:39,038 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 00:09:39,038 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 00:09:39,038 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 00:09:39,039 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 00:09:39,054 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-26 00:09:39,057 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 96 transitions, 197 flow [2020-10-26 00:09:39,061 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 96 transitions, 197 flow [2020-10-26 00:09:39,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 74 places, 96 transitions, 197 flow [2020-10-26 00:09:39,126 INFO L129 PetriNetUnfolder]: 26/95 cut-off events. [2020-10-26 00:09:39,127 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-26 00:09:39,134 INFO L80 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 95 events. 26/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 155 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 80. Up to 3 conditions per place. [2020-10-26 00:09:39,140 INFO L116 LiptonReduction]: Number of co-enabled transitions 3150 [2020-10-26 00:09:40,457 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-26 00:09:40,571 INFO L131 LiptonReduction]: Checked pairs total: 5734 [2020-10-26 00:09:40,572 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-10-26 00:09:40,579 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 51 transitions, 107 flow [2020-10-26 00:09:40,600 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 227 states. [2020-10-26 00:09:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states. [2020-10-26 00:09:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 00:09:40,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:40,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:40,613 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:40,620 INFO L82 PathProgramCache]: Analyzing trace with hash 556857473, now seen corresponding path program 1 times [2020-10-26 00:09:40,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:40,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844749547] [2020-10-26 00:09:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:09:40,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844749547] [2020-10-26 00:09:40,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:40,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:09:40,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454626318] [2020-10-26 00:09:40,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-26 00:09:40,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:40,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-26 00:09:40,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-26 00:09:40,910 INFO L87 Difference]: Start difference. First operand 227 states. Second operand 2 states. [2020-10-26 00:09:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:40,953 INFO L93 Difference]: Finished difference Result 198 states and 534 transitions. [2020-10-26 00:09:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-26 00:09:40,955 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-26 00:09:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:40,976 INFO L225 Difference]: With dead ends: 198 [2020-10-26 00:09:40,976 INFO L226 Difference]: Without dead ends: 198 [2020-10-26 00:09:40,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-26 00:09:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-26 00:09:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-26 00:09:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-26 00:09:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 534 transitions. [2020-10-26 00:09:41,043 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 534 transitions. Word has length 9 [2020-10-26 00:09:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:41,050 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 534 transitions. [2020-10-26 00:09:41,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-26 00:09:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 534 transitions. [2020-10-26 00:09:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-26 00:09:41,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:41,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:41,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 00:09:41,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash -265870444, now seen corresponding path program 1 times [2020-10-26 00:09:41,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:41,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114600646] [2020-10-26 00:09:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:09:41,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114600646] [2020-10-26 00:09:41,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:41,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:09:41,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670411780] [2020-10-26 00:09:41,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:09:41,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:41,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:09:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:09:41,140 INFO L87 Difference]: Start difference. First operand 198 states and 534 transitions. Second operand 3 states. [2020-10-26 00:09:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:41,178 INFO L93 Difference]: Finished difference Result 362 states and 979 transitions. [2020-10-26 00:09:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:09:41,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-26 00:09:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:41,184 INFO L225 Difference]: With dead ends: 362 [2020-10-26 00:09:41,184 INFO L226 Difference]: Without dead ends: 362 [2020-10-26 00:09:41,185 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 [2020-10-26 00:09:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-26 00:09:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 221. [2020-10-26 00:09:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-26 00:09:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 589 transitions. [2020-10-26 00:09:41,214 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 589 transitions. Word has length 11 [2020-10-26 00:09:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:41,215 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 589 transitions. [2020-10-26 00:09:41,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:09:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 589 transitions. [2020-10-26 00:09:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-26 00:09:41,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:41,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:41,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 00:09:41,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1897023782, now seen corresponding path program 1 times [2020-10-26 00:09:41,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:41,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638905207] [2020-10-26 00:09:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:09:41,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638905207] [2020-10-26 00:09:41,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:41,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:09:41,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062481309] [2020-10-26 00:09:41,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:09:41,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:41,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:09:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:09:41,319 INFO L87 Difference]: Start difference. First operand 221 states and 589 transitions. Second operand 3 states. [2020-10-26 00:09:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:41,354 INFO L93 Difference]: Finished difference Result 348 states and 934 transitions. [2020-10-26 00:09:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:09:41,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-26 00:09:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:41,358 INFO L225 Difference]: With dead ends: 348 [2020-10-26 00:09:41,358 INFO L226 Difference]: Without dead ends: 348 [2020-10-26 00:09:41,358 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 [2020-10-26 00:09:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-26 00:09:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 218. [2020-10-26 00:09:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-26 00:09:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 560 transitions. [2020-10-26 00:09:41,378 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 560 transitions. Word has length 11 [2020-10-26 00:09:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:41,378 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 560 transitions. [2020-10-26 00:09:41,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:09:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 560 transitions. [2020-10-26 00:09:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:09:41,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:41,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:41,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 00:09:41,381 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash -293575379, now seen corresponding path program 1 times [2020-10-26 00:09:41,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:41,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694130012] [2020-10-26 00:09:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:09:41,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694130012] [2020-10-26 00:09:41,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:41,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:09:41,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984415555] [2020-10-26 00:09:41,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:09:41,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:41,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:09:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:09:41,422 INFO L87 Difference]: Start difference. First operand 218 states and 560 transitions. Second operand 3 states. [2020-10-26 00:09:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:41,489 INFO L93 Difference]: Finished difference Result 234 states and 577 transitions. [2020-10-26 00:09:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:09:41,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-26 00:09:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:41,491 INFO L225 Difference]: With dead ends: 234 [2020-10-26 00:09:41,492 INFO L226 Difference]: Without dead ends: 234 [2020-10-26 00:09:41,492 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 [2020-10-26 00:09:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-26 00:09:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2020-10-26 00:09:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-26 00:09:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 569 transitions. [2020-10-26 00:09:41,512 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 569 transitions. Word has length 19 [2020-10-26 00:09:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:41,515 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 569 transitions. [2020-10-26 00:09:41,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:09:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 569 transitions. [2020-10-26 00:09:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:09:41,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:41,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:41,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 00:09:41,522 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -369860675, now seen corresponding path program 2 times [2020-10-26 00:09:41,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:41,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700153956] [2020-10-26 00:09:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:09:41,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700153956] [2020-10-26 00:09:41,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:41,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:09:41,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457932361] [2020-10-26 00:09:41,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:09:41,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:09:41,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:09:41,600 INFO L87 Difference]: Start difference. First operand 230 states and 569 transitions. Second operand 3 states. [2020-10-26 00:09:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:41,671 INFO L93 Difference]: Finished difference Result 228 states and 553 transitions. [2020-10-26 00:09:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:09:41,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-26 00:09:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:41,677 INFO L225 Difference]: With dead ends: 228 [2020-10-26 00:09:41,677 INFO L226 Difference]: Without dead ends: 228 [2020-10-26 00:09:41,678 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 [2020-10-26 00:09:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-26 00:09:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-26 00:09:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-26 00:09:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 553 transitions. [2020-10-26 00:09:41,695 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 553 transitions. Word has length 19 [2020-10-26 00:09:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:41,696 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 553 transitions. [2020-10-26 00:09:41,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:09:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 553 transitions. [2020-10-26 00:09:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:09:41,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:41,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:41,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 00:09:41,704 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash -520856579, now seen corresponding path program 3 times [2020-10-26 00:09:41,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:41,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936971251] [2020-10-26 00:09:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:09:41,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936971251] [2020-10-26 00:09:41,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:41,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:09:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445913669] [2020-10-26 00:09:41,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:09:41,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:09:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:09:41,776 INFO L87 Difference]: Start difference. First operand 228 states and 553 transitions. Second operand 3 states. [2020-10-26 00:09:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:41,872 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2020-10-26 00:09:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:09:41,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-26 00:09:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:41,874 INFO L225 Difference]: With dead ends: 194 [2020-10-26 00:09:41,874 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 00:09:41,875 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 [2020-10-26 00:09:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 00:09:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 00:09:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 00:09:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 00:09:41,875 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-26 00:09:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:41,876 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 00:09:41,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:09:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 00:09:41,876 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 00:09:41,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 00:09:41,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 12:09:41 BasicIcfg [2020-10-26 00:09:41,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 00:09:41,883 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 00:09:41,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 00:09:41,884 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 00:09:41,884 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:09:38" (3/4) ... [2020-10-26 00:09:41,889 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 00:09:41,896 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2020-10-26 00:09:41,905 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-26 00:09:41,905 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-26 00:09:41,905 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:09:41,906 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:09:41,960 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 00:09:41,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 00:09:41,962 INFO L168 Benchmark]: Toolchain (without parser) took 4308.55 ms. Allocated memory was 46.1 MB in the beginning and 83.9 MB in the end (delta: 37.7 MB). Free memory was 30.9 MB in the beginning and 36.6 MB in the end (delta: -5.7 MB). Peak memory consumption was 31.9 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:41,963 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 46.1 MB. Free memory was 29.2 MB in the beginning and 29.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:09:41,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 634.15 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 30.3 MB in the beginning and 37.1 MB in the end (delta: -6.8 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:41,965 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.87 ms. Allocated memory is still 56.6 MB. Free memory was 37.1 MB in the beginning and 35.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:41,966 INFO L168 Benchmark]: Boogie Preprocessor took 35.83 ms. Allocated memory is still 56.6 MB. Free memory was 35.3 MB in the beginning and 33.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:09:41,966 INFO L168 Benchmark]: RCFGBuilder took 522.10 ms. Allocated memory is still 56.6 MB. Free memory was 33.8 MB in the beginning and 25.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:41,967 INFO L168 Benchmark]: TraceAbstraction took 2968.67 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 25.1 MB in the beginning and 38.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:41,968 INFO L168 Benchmark]: Witness Printer took 77.25 ms. Allocated memory is still 83.9 MB. Free memory was 38.7 MB in the beginning and 36.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:41,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 46.1 MB. Free memory was 29.2 MB in the beginning and 29.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 634.15 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 30.3 MB in the beginning and 37.1 MB in the end (delta: -6.8 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.87 ms. Allocated memory is still 56.6 MB. Free memory was 37.1 MB in the beginning and 35.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.83 ms. Allocated memory is still 56.6 MB. Free memory was 35.3 MB in the beginning and 33.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 522.10 ms. Allocated memory is still 56.6 MB. Free memory was 33.8 MB in the beginning and 25.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2968.67 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 25.1 MB in the beginning and 38.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Witness Printer took 77.25 ms. Allocated memory is still 83.9 MB. Free memory was 38.7 MB in the beginning and 36.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1482 VarBasedMoverChecksPositive, 38 VarBasedMoverChecksNegative, 16 SemBasedMoverChecksPositive, 22 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 107 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.5s, 74 PlacesBefore, 35 PlacesAfterwards, 96 TransitionsBefore, 51 TransitionsAfterwards, 3150 CoEnabledTransitionPairs, 5 FixpointIterations, 13 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 6 ChoiceCompositions, 63 TotalNumberOfCompositions, 5734 MoverChecksTotal - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: 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, 71 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 314 SDtfs, 133 SDslu, 117 SDs, 0 SdLazy, 76 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 275 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 1600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...