./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/simple_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer --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 c1aec226fa808ce4648112e4b44dc4f177929414 ........................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:39:22,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:39:22,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:39:22,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:39:22,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:39:22,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:39:22,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:39:22,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:39:22,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:39:22,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:39:22,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:39:22,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:39:22,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:39:22,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:39:22,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:39:22,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:39:22,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:39:22,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:39:22,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:39:22,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:39:22,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:39:22,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:39:22,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:39:22,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:39:22,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:39:22,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:39:22,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:39:22,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:39:22,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:39:22,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:39:22,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:39:22,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:39:22,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:39:22,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:39:22,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:39:22,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:39:22,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:39:22,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:39:22,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:39:22,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:39:22,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:39:22,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:39:22,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:39:22,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:39:22,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:39:22,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:39:22,894 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:39:22,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:39:22,895 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:39:22,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:39:22,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:39:22,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:39:22,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:39:22,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:39:22,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:39:22,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:39:22,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:39:22,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:39:22,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:39:22,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:39:22,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:39:22,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:39:22,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:39:22,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:39:22,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:39:22,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:39:22,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:39:22,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:39:22,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:39:22,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:39:22,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:39:22,913 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:/tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1aec226fa808ce4648112e4b44dc4f177929414 [2020-11-29 22:39:23,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:39:23,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:39:23,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:39:23,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:39:23,256 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:39:23,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/simple_4-2.c [2020-11-29 22:39:23,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/data/0130e6d5c/e56f8fe414024e3da33f9db9ad217602/FLAG677b0faed [2020-11-29 22:39:23,871 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:39:23,872 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/sv-benchmarks/c/loop-acceleration/simple_4-2.c [2020-11-29 22:39:23,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/data/0130e6d5c/e56f8fe414024e3da33f9db9ad217602/FLAG677b0faed [2020-11-29 22:39:24,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/data/0130e6d5c/e56f8fe414024e3da33f9db9ad217602 [2020-11-29 22:39:24,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:39:24,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:39:24,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:39:24,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:39:24,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:39:24,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ad1fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24, skipping insertion in model container [2020-11-29 22:39:24,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:39:24,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:39:24,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:39:24,491 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:39:24,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:39:24,524 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:39:24,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24 WrapperNode [2020-11-29 22:39:24,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:39:24,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:39:24,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:39:24,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:39:24,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:39:24,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:39:24,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:39:24,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:39:24,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... [2020-11-29 22:39:24,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:39:24,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:39:24,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:39:24,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:39:24,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/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 [2020-11-29 22:39:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:39:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:39:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:39:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:39:24,913 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:39:24,914 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 22:39:24,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:39:24 BoogieIcfgContainer [2020-11-29 22:39:24,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:39:24,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:39:24,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:39:24,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:39:24,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:39:24" (1/3) ... [2020-11-29 22:39:24,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4945009c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:39:24, skipping insertion in model container [2020-11-29 22:39:24,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:39:24" (2/3) ... [2020-11-29 22:39:24,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4945009c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:39:24, skipping insertion in model container [2020-11-29 22:39:24,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:39:24" (3/3) ... [2020-11-29 22:39:24,934 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-11-29 22:39:24,947 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:39:24,955 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:39:24,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:39:25,027 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:39:25,027 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:39:25,027 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:39:25,027 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:39:25,028 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:39:25,028 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:39:25,028 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:39:25,028 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:39:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-29 22:39:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 22:39:25,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:39:25,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 22:39:25,050 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:39:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:39:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-11-29 22:39:25,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:39:25,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664602369] [2020-11-29 22:39:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:39:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:39:25,382 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-11-29 22:39:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:39:25,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664602369] [2020-11-29 22:39:25,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:39:25,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:39:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645453155] [2020-11-29 22:39:25,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:39:25,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:39:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:39:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:39:25,435 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-29 22:39:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:39:25,490 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-11-29 22:39:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:39:25,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-29 22:39:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:39:25,513 INFO L225 Difference]: With dead ends: 19 [2020-11-29 22:39:25,529 INFO L226 Difference]: Without dead ends: 8 [2020-11-29 22:39:25,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:39:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-29 22:39:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-29 22:39:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 22:39:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-29 22:39:25,579 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-29 22:39:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:39:25,580 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-29 22:39:25,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:39:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-29 22:39:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 22:39:25,582 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:39:25,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:39:25,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:39:25,584 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:39:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:39:25,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-11-29 22:39:25,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:39:25,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225093341] [2020-11-29 22:39:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:39:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:39:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:39:25,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225093341] [2020-11-29 22:39:25,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721787567] [2020-11-29 22:39:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:39:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:39:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:39:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:39:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:39:25,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:39:25,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 22:39:25,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177546460] [2020-11-29 22:39:25,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:39:25,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:39:25,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:39:25,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:39:25,902 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-11-29 22:39:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:39:25,946 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-11-29 22:39:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:39:25,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-29 22:39:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:39:25,948 INFO L225 Difference]: With dead ends: 13 [2020-11-29 22:39:25,948 INFO L226 Difference]: Without dead ends: 9 [2020-11-29 22:39:25,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:39:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-29 22:39:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 22:39:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 22:39:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-29 22:39:25,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-11-29 22:39:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:39:25,953 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-29 22:39:25,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:39:25,953 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-29 22:39:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 22:39:25,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:39:25,954 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 22:39:26,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 22:39:26,178 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:39:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:39:26,179 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-11-29 22:39:26,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:39:26,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667488518] [2020-11-29 22:39:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:39:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:39:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:39:26,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667488518] [2020-11-29 22:39:26,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194158424] [2020-11-29 22:39:26,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:39:26,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 22:39:26,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:39:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:39:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:39:26,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:39:26,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:39:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 22:39:26,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:39:26,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-11-29 22:39:26,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181980778] [2020-11-29 22:39:26,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:39:26,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:39:26,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:39:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:39:26,496 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2020-11-29 22:39:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:39:26,524 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-11-29 22:39:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:39:26,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 22:39:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:39:26,525 INFO L225 Difference]: With dead ends: 9 [2020-11-29 22:39:26,525 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 22:39:26,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:39:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 22:39:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 22:39:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 22:39:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:39:26,527 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-11-29 22:39:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:39:26,527 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:39:26,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:39:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:39:26,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 22:39:26,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:39:26,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 22:39:26,745 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 22:39:26,745 INFO L277 CegarLoopResult]: At program point L15-2(lines 15 17) the Hoare annotation is: true [2020-11-29 22:39:26,745 INFO L274 CegarLoopResult]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2020-11-29 22:39:26,745 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-29 22:39:26,746 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 22:39:26,746 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 22:39:26,746 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 22:39:26,746 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 22:39:26,746 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 22:39:26,746 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-11-29 22:39:26,747 INFO L277 CegarLoopResult]: At program point L6-2(lines 1 20) the Hoare annotation is: true [2020-11-29 22:39:26,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:39:26 BoogieIcfgContainer [2020-11-29 22:39:26,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:39:26,761 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:39:26,761 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:39:26,762 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:39:26,762 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:39:24" (3/4) ... [2020-11-29 22:39:26,766 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 22:39:26,775 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-29 22:39:26,776 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 22:39:26,776 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:39:26,776 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:39:26,814 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0dea2a10-8956-4ec5-b5cb-dc52e865a0ba/bin/uautomizer/witness.graphml [2020-11-29 22:39:26,815 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:39:26,816 INFO L168 Benchmark]: Toolchain (without parser) took 2579.89 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 66.7 MB in the beginning and 84.8 MB in the end (delta: -18.0 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2020-11-29 22:39:26,817 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:39:26,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.84 ms. Allocated memory is still 96.5 MB. Free memory was 66.5 MB in the beginning and 73.9 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:39:26,819 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.77 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 72.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:39:26,819 INFO L168 Benchmark]: Boogie Preprocessor took 23.03 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 71.8 MB in the end (delta: 808.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:39:26,820 INFO L168 Benchmark]: RCFGBuilder took 327.88 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 61.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:39:26,821 INFO L168 Benchmark]: TraceAbstraction took 1841.61 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 61.0 MB in the beginning and 87.6 MB in the end (delta: -26.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:39:26,822 INFO L168 Benchmark]: Witness Printer took 53.76 ms. Allocated memory is still 117.4 MB. Free memory was 87.6 MB in the beginning and 84.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:39:26,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 287.84 ms. Allocated memory is still 96.5 MB. Free memory was 66.5 MB in the beginning and 73.9 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.77 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 72.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.03 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 71.8 MB in the end (delta: 808.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 327.88 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 61.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1841.61 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 61.0 MB in the beginning and 87.6 MB in the end (delta: -26.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 53.76 ms. Allocated memory is still 117.4 MB. Free memory was 87.6 MB in the beginning and 84.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 1 SDslu, 17 SDs, 0 SdLazy, 17 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 5 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 36 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 573 SizeOfPredicates, 4 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/8 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...