./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan --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 Taipan --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 0.2.0-7b2dab5 [2020-12-09 19:57:07,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:57:07,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:57:07,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:57:07,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:57:07,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:57:07,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:57:07,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:57:07,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:57:07,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:57:07,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:57:07,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:57:07,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:57:07,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:57:07,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:57:07,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:57:07,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:57:07,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:57:07,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:57:07,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:57:07,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:57:07,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:57:07,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:57:07,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:57:07,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:57:07,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:57:07,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:57:07,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:57:07,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:57:07,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:57:07,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:57:07,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:57:07,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:57:07,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:57:07,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:57:07,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:57:07,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:57:07,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:57:07,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:57:07,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:57:07,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:57:07,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:57:07,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:57:07,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:57:07,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:57:07,625 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:57:07,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:57:07,626 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:57:07,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:57:07,626 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:57:07,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:57:07,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:57:07,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:57:07,626 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:57:07,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:57:07,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:57:07,627 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:57:07,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:57:07,628 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:57:07,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:57:07,629 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:57:07,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:57:07,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:57:07,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:57:07,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:57:07,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:57:07,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:57:07,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:57:07,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:57:07,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:57:07,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:57:07,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:57:07,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:57:07,631 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02fc4bd1d36800792ed4ab31b3ee599492a65576 [2020-12-09 19:57:07,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:57:07,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:57:07,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:57:07,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:57:07,831 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:57:07,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_o3.c [2020-12-09 19:57:07,872 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/data/f9a90a196/a29adc9a7c8946cb994eab1848aaa868/FLAGd50e37288 [2020-12-09 19:57:08,219 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:57:08,219 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/sv-benchmarks/c/recursive-simple/id_o3.c [2020-12-09 19:57:08,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/data/f9a90a196/a29adc9a7c8946cb994eab1848aaa868/FLAGd50e37288 [2020-12-09 19:57:08,654 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/data/f9a90a196/a29adc9a7c8946cb994eab1848aaa868 [2020-12-09 19:57:08,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:57:08,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:57:08,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:57:08,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:57:08,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:57:08,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@356d8a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08, skipping insertion in model container [2020-12-09 19:57:08,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:57:08,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:57:08,767 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/sv-benchmarks/c/recursive-simple/id_o3.c[514,527] [2020-12-09 19:57:08,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:57:08,775 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:57:08,785 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/sv-benchmarks/c/recursive-simple/id_o3.c[514,527] [2020-12-09 19:57:08,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:57:08,795 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:57:08,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08 WrapperNode [2020-12-09 19:57:08,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:57:08,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:57:08,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:57:08,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:57:08,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:57:08,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:57:08,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:57:08,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:57:08,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... [2020-12-09 19:57:08,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:57:08,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:57:08,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:57:08,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:57:08,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/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 [2020-12-09 19:57:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:57:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:57:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:57:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-09 19:57:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-09 19:57:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:57:09,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:57:09,024 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 19:57:09,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:57:09 BoogieIcfgContainer [2020-12-09 19:57:09,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:57:09,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:57:09,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:57:09,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:57:09,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:57:08" (1/3) ... [2020-12-09 19:57:09,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e580ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:57:09, skipping insertion in model container [2020-12-09 19:57:09,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:57:08" (2/3) ... [2020-12-09 19:57:09,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e580ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:57:09, skipping insertion in model container [2020-12-09 19:57:09,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:57:09" (3/3) ... [2020-12-09 19:57:09,034 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-12-09 19:57:09,048 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:57:09,051 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 19:57:09,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 19:57:09,084 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:57:09,084 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:57:09,084 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:57:09,084 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:57:09,084 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:57:09,084 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:57:09,084 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:57:09,085 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:57:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-09 19:57:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 19:57:09,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:57:09,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:57:09,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:57:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:57:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2020-12-09 19:57:09,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:57:09,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740195973] [2020-12-09 19:57:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:57:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:57:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:57:09,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740195973] [2020-12-09 19:57:09,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:57:09,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:57:09,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634108938] [2020-12-09 19:57:09,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:57:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:57:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:57:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:57:09,265 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2020-12-09 19:57:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:57:09,303 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-09 19:57:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:57:09,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 19:57:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:57:09,312 INFO L225 Difference]: With dead ends: 24 [2020-12-09 19:57:09,312 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 19:57:09,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:57:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 19:57:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 19:57:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 19:57:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 19:57:09,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-09 19:57:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:57:09,351 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 19:57:09,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:57:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 19:57:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 19:57:09,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:57:09,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:57:09,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:57:09,353 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:57:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:57:09,354 INFO L82 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2020-12-09 19:57:09,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:57:09,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576100172] [2020-12-09 19:57:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:57:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:57:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:57:09,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576100172] [2020-12-09 19:57:09,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190434690] [2020-12-09 19:57:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/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 [2020-12-09 19:57:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:57:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 19:57:09,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:57:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:57:09,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:57:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:57:09,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279240685] [2020-12-09 19:57:09,686 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 19:57:09,686 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:57:09,689 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 19:57:09,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 19:57:09,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-12-09 19:57:09,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748547342] [2020-12-09 19:57:09,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 19:57:09,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:57:09,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 19:57:09,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:57:09,693 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 13 states. [2020-12-09 19:57:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:57:09,730 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-09 19:57:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 19:57:09,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-09 19:57:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:57:09,731 INFO L225 Difference]: With dead ends: 26 [2020-12-09 19:57:09,731 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 19:57:09,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:57:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 19:57:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 19:57:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 19:57:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 19:57:09,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-12-09 19:57:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:57:09,736 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 19:57:09,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 19:57:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 19:57:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 19:57:09,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:57:09,737 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:57:09,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 19:57:09,939 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:57:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:57:09,941 INFO L82 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 2 times [2020-12-09 19:57:09,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:57:09,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497580723] [2020-12-09 19:57:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:57:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:57:10,017 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:57:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:57:10,087 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:57:10,110 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 19:57:10,110 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:57:10,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 19:57:10,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:57:10 BoogieIcfgContainer [2020-12-09 19:57:10,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:57:10,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:57:10,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:57:10,139 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:57:10,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:57:09" (3/4) ... [2020-12-09 19:57:10,141 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 19:57:10,173 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_efcd3c2d-6742-4023-91ef-6b617653806d/bin/utaipan/witness.graphml [2020-12-09 19:57:10,174 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:57:10,175 INFO L168 Benchmark]: Toolchain (without parser) took 1517.14 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 69.1 MB in the beginning and 81.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:57:10,176 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory was 40.5 MB in the beginning and 40.4 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:57:10,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.65 ms. Allocated memory is still 92.3 MB. Free memory was 68.9 MB in the beginning and 59.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:57:10,176 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.49 ms. Allocated memory is still 92.3 MB. Free memory was 59.8 MB in the beginning and 58.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:57:10,177 INFO L168 Benchmark]: Boogie Preprocessor took 11.86 ms. Allocated memory is still 92.3 MB. Free memory was 58.4 MB in the beginning and 57.5 MB in the end (delta: 898.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:57:10,177 INFO L168 Benchmark]: RCFGBuilder took 196.65 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 65.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:57:10,178 INFO L168 Benchmark]: TraceAbstraction took 1110.96 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 65.5 MB in the beginning and 83.4 MB in the end (delta: -17.9 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:57:10,178 INFO L168 Benchmark]: Witness Printer took 34.75 ms. Allocated memory is still 111.1 MB. Free memory was 83.4 MB in the beginning and 81.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:57:10,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory was 40.5 MB in the beginning and 40.4 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 137.65 ms. Allocated memory is still 92.3 MB. Free memory was 68.9 MB in the beginning and 59.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.49 ms. Allocated memory is still 92.3 MB. Free memory was 59.8 MB in the beginning and 58.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.86 ms. Allocated memory is still 92.3 MB. Free memory was 58.4 MB in the beginning and 57.5 MB in the end (delta: 898.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 196.65 ms. Allocated memory is still 92.3 MB. Free memory was 57.5 MB in the beginning and 65.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1110.96 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 65.5 MB in the beginning and 83.4 MB in the end (delta: -17.9 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. * Witness Printer took 34.75 ms. Allocated memory is still 111.1 MB. Free memory was 83.4 MB in the beginning and 81.3 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: 15]: a call to reach_error is reachable a call to reach_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 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 2 SDslu, 136 SDs, 0 SdLazy, 45 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 2186 SizeOfPredicates, 1 NumberOfNonLiveVariables, 61 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 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...