./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/array-2.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_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/array-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/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 a4c882ea31ded5d72491d0989b7efed83bec9369 .................................................................................................................................................................................................................................................................................................. 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 17:13:47,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:13:47,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:13:47,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:13:47,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:13:47,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:13:47,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:13:47,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:13:47,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:13:47,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:13:47,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:13:47,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:13:47,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:13:47,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:13:47,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:13:47,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:13:47,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:13:47,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:13:47,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:13:47,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:13:47,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:13:47,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:13:47,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:13:47,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:13:47,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:13:47,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:13:47,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:13:47,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:13:47,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:13:47,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:13:47,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:13:47,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:13:47,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:13:47,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:13:47,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:13:47,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:13:47,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:13:47,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:13:47,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:13:47,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:13:47,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:13:47,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:13:47,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:13:47,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:13:47,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:13:47,615 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:13:47,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:13:47,615 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:13:47,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:13:47,615 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:13:47,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:13:47,616 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:13:47,616 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:13:47,616 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:13:47,616 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:13:47,616 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:13:47,617 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:13:47,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:13:47,617 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:13:47,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:13:47,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:13:47,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:13:47,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:13:47,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:13:47,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:13:47,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:13:47,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:13:47,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:13:47,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:13:47,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:13:47,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:13:47,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:13:47,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:13:47,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:13:47,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:13:47,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:13:47,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:13:47,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:13:47,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:13:47,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:13:47,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:13:47,621 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_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4c882ea31ded5d72491d0989b7efed83bec9369 [2020-12-09 17:13:47,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:13:47,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:13:47,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:13:47,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:13:47,832 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:13:47,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/../../sv-benchmarks/c/loops/array-2.c [2020-12-09 17:13:47,873 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/data/efd5d99c1/154e8c0cfb3f41eb9c3adfde9679975f/FLAG2a44853e2 [2020-12-09 17:13:48,224 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:13:48,224 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/sv-benchmarks/c/loops/array-2.c [2020-12-09 17:13:48,229 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/data/efd5d99c1/154e8c0cfb3f41eb9c3adfde9679975f/FLAG2a44853e2 [2020-12-09 17:13:48,654 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/data/efd5d99c1/154e8c0cfb3f41eb9c3adfde9679975f [2020-12-09 17:13:48,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:13:48,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:13:48,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:13:48,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:13:48,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:13:48,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c76cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48, skipping insertion in model container [2020-12-09 17:13:48,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:13:48,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:13:48,784 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_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/sv-benchmarks/c/loops/array-2.c[319,332] [2020-12-09 17:13:48,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:13:48,801 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:13:48,809 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_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/sv-benchmarks/c/loops/array-2.c[319,332] [2020-12-09 17:13:48,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:13:48,823 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:13:48,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48 WrapperNode [2020-12-09 17:13:48,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:13:48,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:13:48,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:13:48,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:13:48,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:13:48,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:13:48,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:13:48,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:13:48,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... [2020-12-09 17:13:48,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:13:48,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:13:48,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:13:48,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:13:48,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/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 17:13:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:13:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:13:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:13:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:13:48,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:13:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 17:13:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:13:49,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:13:49,174 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 17:13:49,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:13:49 BoogieIcfgContainer [2020-12-09 17:13:49,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:13:49,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:13:49,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:13:49,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:13:49,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:13:48" (1/3) ... [2020-12-09 17:13:49,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d634a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:13:49, skipping insertion in model container [2020-12-09 17:13:49,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:13:48" (2/3) ... [2020-12-09 17:13:49,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d634a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:13:49, skipping insertion in model container [2020-12-09 17:13:49,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:13:49" (3/3) ... [2020-12-09 17:13:49,183 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-12-09 17:13:49,192 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:13:49,195 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 17:13:49,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 17:13:49,218 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:13:49,218 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:13:49,218 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:13:49,218 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:13:49,218 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:13:49,219 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:13:49,219 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:13:49,219 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:13:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 17:13:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:13:49,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:13:49,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:13:49,230 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:13:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:13:49,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2035207, now seen corresponding path program 1 times [2020-12-09 17:13:49,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:13:49,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046584259] [2020-12-09 17:13:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:13:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:13:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:13:49,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046584259] [2020-12-09 17:13:49,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:13:49,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:13:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81379561] [2020-12-09 17:13:49,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:13:49,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:13:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:13:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:13:49,403 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-12-09 17:13:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:13:49,419 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-12-09 17:13:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:13:49,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 17:13:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:13:49,426 INFO L225 Difference]: With dead ends: 13 [2020-12-09 17:13:49,426 INFO L226 Difference]: Without dead ends: 6 [2020-12-09 17:13:49,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:13:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-09 17:13:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-09 17:13:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-09 17:13:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-09 17:13:49,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-12-09 17:13:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:13:49,449 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-09 17:13:49,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:13:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-09 17:13:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:13:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:13:49,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:13:49,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:13:49,450 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:13:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:13:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash 63196130, now seen corresponding path program 1 times [2020-12-09 17:13:49,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:13:49,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893506559] [2020-12-09 17:13:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:13:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:13:49,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:13:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:13:49,506 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:13:49,521 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 17:13:49,521 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:13:49,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:13:49,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:13:49 BoogieIcfgContainer [2020-12-09 17:13:49,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:13:49,542 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:13:49,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:13:49,543 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:13:49,543 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:13:49" (3/4) ... [2020-12-09 17:13:49,544 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 17:13:49,570 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c0b5324e-8c37-4ff3-9ca7-7c92c062f14d/bin/utaipan/witness.graphml [2020-12-09 17:13:49,570 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:13:49,571 INFO L168 Benchmark]: Toolchain (without parser) took 914.22 ms. Allocated memory is still 96.5 MB. Free memory was 57.3 MB in the beginning and 73.4 MB in the end (delta: -16.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:13:49,572 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 96.5 MB. Free memory is still 73.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:13:49,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.47 ms. Allocated memory is still 96.5 MB. Free memory was 57.1 MB in the beginning and 73.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:13:49,573 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.58 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 72.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:13:49,573 INFO L168 Benchmark]: Boogie Preprocessor took 21.86 ms. Allocated memory is still 96.5 MB. Free memory was 72.4 MB in the beginning and 71.4 MB in the end (delta: 984.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:13:49,573 INFO L168 Benchmark]: RCFGBuilder took 300.25 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 64.7 MB in the end (delta: 6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:13:49,574 INFO L168 Benchmark]: TraceAbstraction took 364.44 ms. Allocated memory is still 96.5 MB. Free memory was 64.3 MB in the beginning and 75.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2020-12-09 17:13:49,574 INFO L168 Benchmark]: Witness Printer took 27.99 ms. Allocated memory is still 96.5 MB. Free memory was 75.0 MB in the beginning and 73.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:13:49,577 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 96.5 MB. Free memory is still 73.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.47 ms. Allocated memory is still 96.5 MB. Free memory was 57.1 MB in the beginning and 73.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.58 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 72.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.86 ms. Allocated memory is still 96.5 MB. Free memory was 72.4 MB in the beginning and 71.4 MB in the end (delta: 984.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 300.25 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 64.7 MB in the end (delta: 6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 364.44 ms. Allocated memory is still 96.5 MB. Free memory was 64.3 MB in the beginning and 75.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. * Witness Printer took 27.99 ms. Allocated memory is still 96.5 MB. Free memory was 75.0 MB in the beginning and 73.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] unsigned int SIZE=1; [L16] unsigned int j,k; [L17] int array[SIZE], menor; [L19] menor = __VERIFIER_nondet_int() [L21] j=0 [L21] COND TRUE j