./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o3.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_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/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 02fc4bd1d36800792ed4ab31b3ee599492a65576 ................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:30:08,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:30:08,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:30:08,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:30:08,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:30:08,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:30:08,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:30:08,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:30:08,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:30:08,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:30:08,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:30:08,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:30:08,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:30:08,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:30:08,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:30:08,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:30:08,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:30:08,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:30:08,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:30:08,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:30:08,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:30:08,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:30:08,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:30:08,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:30:08,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:30:08,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:30:08,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:30:08,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:30:08,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:30:08,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:30:08,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:30:08,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:30:08,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:30:08,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:30:08,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:30:08,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:30:08,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:30:08,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:30:08,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:30:08,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:30:08,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:30:08,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:30:08,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:30:08,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:30:08,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:30:08,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:30:08,791 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:30:08,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:30:08,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:30:08,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:30:08,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:30:08,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:30:08,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:30:08,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:30:08,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:30:08,794 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:30:08,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:30:08,794 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:30:08,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:30:08,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:30:08,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:30:08,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:30:08,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:30:08,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:30:08,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:30:08,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:30:08,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:30:08,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:30:08,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:30:08,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:30:08,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:30:08,799 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_48d2698e-2fec-4dda-92c0-660899a1f1c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02fc4bd1d36800792ed4ab31b3ee599492a65576 [2020-11-30 00:30:09,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:30:09,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:30:09,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:30:09,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:30:09,134 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:30:09,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o3.c [2020-11-30 00:30:09,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/data/b339ff077/609673ee3de543e79d4bddaed86bb731/FLAG6f0cb77e2 [2020-11-30 00:30:09,800 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:30:09,801 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/sv-benchmarks/c/recursive-simple/id_o3.c [2020-11-30 00:30:09,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/data/b339ff077/609673ee3de543e79d4bddaed86bb731/FLAG6f0cb77e2 [2020-11-30 00:30:10,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/data/b339ff077/609673ee3de543e79d4bddaed86bb731 [2020-11-30 00:30:10,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:30:10,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:30:10,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:30:10,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:30:10,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:30:10,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a71875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10, skipping insertion in model container [2020-11-30 00:30:10,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:30:10,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:30:10,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:30:10,488 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:30:10,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:30:10,525 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:30:10,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10 WrapperNode [2020-11-30 00:30:10,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:30:10,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:30:10,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:30:10,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:30:10,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:30:10,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:30:10,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:30:10,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:30:10,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... [2020-11-30 00:30:10,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:30:10,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:30:10,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:30:10,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:30:10,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/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 [2020-11-30 00:30:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:30:10,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:30:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:30:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 00:30:10,702 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 00:30:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:30:10,995 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:30:10,995 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:30:10,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:30:10 BoogieIcfgContainer [2020-11-30 00:30:10,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:30:10,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:30:10,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:30:11,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:30:11,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:30:10" (1/3) ... [2020-11-30 00:30:11,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb82608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:30:11, skipping insertion in model container [2020-11-30 00:30:11,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:30:10" (2/3) ... [2020-11-30 00:30:11,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb82608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:30:11, skipping insertion in model container [2020-11-30 00:30:11,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:30:10" (3/3) ... [2020-11-30 00:30:11,020 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-11-30 00:30:11,050 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:30:11,054 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:30:11,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:30:11,105 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:30:11,106 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:30:11,106 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:30:11,106 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:30:11,106 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:30:11,107 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:30:11,107 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:30:11,107 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:30:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-30 00:30:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:30:11,131 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:30:11,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:30:11,132 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:30:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:30:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-30 00:30:11,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:30:11,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823547785] [2020-11-30 00:30:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:30:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:11,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:30:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:30:11,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823547785] [2020-11-30 00:30:11,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:30:11,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:30:11,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916075326] [2020-11-30 00:30:11,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:30:11,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:30:11,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:30:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:30:11,479 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-30 00:30:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:30:11,563 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-30 00:30:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:30:11,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:30:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:30:11,575 INFO L225 Difference]: With dead ends: 29 [2020-11-30 00:30:11,575 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 00:30:11,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:30:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 00:30:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 00:30:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 00:30:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-30 00:30:11,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-30 00:30:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:30:11,654 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-30 00:30:11,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:30:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-30 00:30:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 00:30:11,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:30:11,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:30:11,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:30:11,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:30:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:30:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-30 00:30:11,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:30:11,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15260415] [2020-11-30 00:30:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:30:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:11,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:30:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:11,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:30:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:30:12,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15260415] [2020-11-30 00:30:12,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323924077] [2020-11-30 00:30:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/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 [2020-11-30 00:30:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:30:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:30:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:30:12,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:30:12,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-30 00:30:12,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335431142] [2020-11-30 00:30:12,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:30:12,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:30:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:30:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:30:12,481 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-11-30 00:30:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:30:12,523 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-30 00:30:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:30:12,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 00:30:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:30:12,525 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:30:12,525 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 00:30:12,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:30:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 00:30:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 00:30:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 00:30:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-30 00:30:12,534 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-30 00:30:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:30:12,534 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-30 00:30:12,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:30:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-30 00:30:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:30:12,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:30:12,536 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:30:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 00:30:12,757 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:30:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:30:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-30 00:30:12,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:30:12,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603236685] [2020-11-30 00:30:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:30:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:12,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:30:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:12,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:30:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:13,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:30:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:30:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 00:30:13,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603236685] [2020-11-30 00:30:13,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081143974] [2020-11-30 00:30:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/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 [2020-11-30 00:30:13,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:30:13,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:30:13,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:30:13,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:30:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 00:30:13,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:30:13,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-30 00:30:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694443772] [2020-11-30 00:30:13,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 00:30:13,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:30:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 00:30:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:30:13,336 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-11-30 00:30:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:30:13,410 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-30 00:30:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:30:13,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-11-30 00:30:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:30:13,413 INFO L225 Difference]: With dead ends: 25 [2020-11-30 00:30:13,413 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 00:30:13,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:30:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 00:30:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 00:30:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:30:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 00:30:13,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-30 00:30:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:30:13,425 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 00:30:13,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 00:30:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 00:30:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:30:13,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:30:13,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:30:13,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:30:13,655 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:30:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:30:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-30 00:30:13,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:30:13,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304120332] [2020-11-30 00:30:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:30:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:30:13,723 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:30:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:30:13,751 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:30:13,783 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:30:13,784 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:30:13,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:30:13,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:30:13 BoogieIcfgContainer [2020-11-30 00:30:13,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:30:13,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:30:13,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:30:13,865 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:30:13,866 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:30:10" (3/4) ... [2020-11-30 00:30:13,868 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:30:13,958 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_48d2698e-2fec-4dda-92c0-660899a1f1c7/bin/uautomizer/witness.graphml [2020-11-30 00:30:13,958 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:30:13,961 INFO L168 Benchmark]: Toolchain (without parser) took 3804.08 ms. Allocated memory was 119.5 MB in the beginning and 155.2 MB in the end (delta: 35.7 MB). Free memory was 88.3 MB in the beginning and 108.9 MB in the end (delta: -20.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:30:13,961 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 77.6 MB. Free memory was 38.4 MB in the beginning and 38.4 MB in the end (delta: 37.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:30:13,963 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.68 ms. Allocated memory is still 119.5 MB. Free memory was 88.3 MB in the beginning and 96.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:30:13,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.85 ms. Allocated memory is still 119.5 MB. Free memory was 96.5 MB in the beginning and 95.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:30:13,964 INFO L168 Benchmark]: Boogie Preprocessor took 31.20 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 94.1 MB in the end (delta: 994.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:30:13,965 INFO L168 Benchmark]: RCFGBuilder took 390.01 ms. Allocated memory is still 119.5 MB. Free memory was 94.1 MB in the beginning and 83.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:30:13,967 INFO L168 Benchmark]: TraceAbstraction took 2864.63 ms. Allocated memory was 119.5 MB in the beginning and 155.2 MB in the end (delta: 35.7 MB). Free memory was 82.9 MB in the beginning and 111.4 MB in the end (delta: -28.5 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2020-11-30 00:30:13,968 INFO L168 Benchmark]: Witness Printer took 94.39 ms. Allocated memory is still 155.2 MB. Free memory was 111.0 MB in the beginning and 108.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:30:13,978 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 77.6 MB. Free memory was 38.4 MB in the beginning and 38.4 MB in the end (delta: 37.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 366.68 ms. Allocated memory is still 119.5 MB. Free memory was 88.3 MB in the beginning and 96.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.85 ms. Allocated memory is still 119.5 MB. Free memory was 96.5 MB in the beginning and 95.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.20 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 94.1 MB in the end (delta: 994.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 390.01 ms. Allocated memory is still 119.5 MB. Free memory was 94.1 MB in the beginning and 83.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2864.63 ms. Allocated memory was 119.5 MB in the beginning and 155.2 MB in the end (delta: 35.7 MB). Free memory was 82.9 MB in the beginning and 111.4 MB in the end (delta: -28.5 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Witness Printer took 94.39 ms. Allocated memory is still 155.2 MB. Free memory was 111.0 MB in the beginning and 108.9 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: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 3 [L4] __assert_fail("0", "id_o3.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 3 SDslu, 198 SDs, 0 SdLazy, 60 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 5481 SizeOfPredicates, 2 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 18/36 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 incorrect! Received shutdown request...