./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/array-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/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-a4ecdab [2020-11-28 07:32:52,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:32:52,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:32:52,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:32:52,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:32:52,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:32:52,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:32:52,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:32:52,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:32:52,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:32:52,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:32:52,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:32:52,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:32:52,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:32:52,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:32:52,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:32:52,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:32:52,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:32:52,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:32:52,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:32:52,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:32:52,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:32:52,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:32:52,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:32:52,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:32:52,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:32:52,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:32:52,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:32:52,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:32:52,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:32:52,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:32:52,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:32:52,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:32:52,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:32:52,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:32:52,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:32:52,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:32:52,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:32:52,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:32:52,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:32:52,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:32:52,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:32:52,245 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:32:52,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:32:52,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:32:52,248 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:32:52,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:32:52,248 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:32:52,249 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:32:52,249 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:32:52,249 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:32:52,249 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:32:52,251 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:32:52,251 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:32:52,251 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:32:52,251 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:32:52,252 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:32:52,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:32:52,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:32:52,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:32:52,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:32:52,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:32:52,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:32:52,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:32:52,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:32:52,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:32:52,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:32:52,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:32:52,255 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:32:52,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:32:52,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:32:52,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:32:52,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:32:52,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:32:52,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:32:52,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:32:52,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:32:52,259 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:32:52,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:32:52,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:32:52,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:32:52,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:32:52,260 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_8eefe402-da8a-44be-be5b-df3ece83f961/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4c882ea31ded5d72491d0989b7efed83bec9369 [2020-11-28 07:32:52,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:32:52,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:32:52,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:32:52,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:32:52,617 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:32:52,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/../../sv-benchmarks/c/loops/array-2.c [2020-11-28 07:32:52,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/data/e7c6a127f/ea1f65817bfb4c029eee2ea63cf5bc7e/FLAG39ade72d3 [2020-11-28 07:32:53,105 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:32:53,105 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/sv-benchmarks/c/loops/array-2.c [2020-11-28 07:32:53,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/data/e7c6a127f/ea1f65817bfb4c029eee2ea63cf5bc7e/FLAG39ade72d3 [2020-11-28 07:32:53,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/data/e7c6a127f/ea1f65817bfb4c029eee2ea63cf5bc7e [2020-11-28 07:32:53,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:32:53,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:32:53,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:32:53,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:32:53,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:32:53,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285ff721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53, skipping insertion in model container [2020-11-28 07:32:53,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:32:53,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:32:53,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:32:53,755 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:32:53,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:32:53,788 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:32:53,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53 WrapperNode [2020-11-28 07:32:53,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:32:53,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:32:53,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:32:53,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:32:53,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:32:53,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:32:53,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:32:53,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:32:53,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... [2020-11-28 07:32:53,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:32:53,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:32:53,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:32:53,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:32:53,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/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 [2020-11-28 07:32:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:32:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:32:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:32:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:32:53,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:32:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:32:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:32:54,367 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:32:54,367 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:32:54,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:32:54 BoogieIcfgContainer [2020-11-28 07:32:54,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:32:54,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:32:54,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:32:54,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:32:54,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:32:53" (1/3) ... [2020-11-28 07:32:54,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3c42ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:32:54, skipping insertion in model container [2020-11-28 07:32:54,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:32:53" (2/3) ... [2020-11-28 07:32:54,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3c42ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:32:54, skipping insertion in model container [2020-11-28 07:32:54,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:32:54" (3/3) ... [2020-11-28 07:32:54,379 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-11-28 07:32:54,389 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:32:54,394 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:32:54,406 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:32:54,432 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:32:54,432 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:32:54,432 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:32:54,432 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:32:54,432 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:32:54,433 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:32:54,433 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:32:54,433 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:32:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-11-28 07:32:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:32:54,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:54,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:32:54,453 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2097672, now seen corresponding path program 1 times [2020-11-28 07:32:54,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:54,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540248324] [2020-11-28 07:32:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:32:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:32:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540248324] [2020-11-28 07:32:54,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:32:54,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:32:54,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350926983] [2020-11-28 07:32:54,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:32:54,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:32:54,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:32:54,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:32:54,727 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-11-28 07:32:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:32:54,760 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-11-28 07:32:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:32:54,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:32:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:32:54,779 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:32:54,779 INFO L226 Difference]: Without dead ends: 6 [2020-11-28 07:32:54,782 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 [2020-11-28 07:32:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-11-28 07:32:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-11-28 07:32:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 07:32:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-11-28 07:32:54,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-11-28 07:32:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:32:54,822 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-11-28 07:32:54,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:32:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-11-28 07:32:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:32:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:32:54,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:32:54,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:32:54,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:32:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:32:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash 65135428, now seen corresponding path program 1 times [2020-11-28 07:32:54,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:32:54,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684822697] [2020-11-28 07:32:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:32:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:32:54,915 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:32:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:32:54,977 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:32:54,999 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:32:55,000 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:32:55,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:32:55,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:32:55 BoogieIcfgContainer [2020-11-28 07:32:55,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:32:55,024 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:32:55,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:32:55,025 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:32:55,025 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:32:54" (3/4) ... [2020-11-28 07:32:55,027 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:32:55,066 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8eefe402-da8a-44be-be5b-df3ece83f961/bin/utaipan/witness.graphml [2020-11-28 07:32:55,067 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:32:55,069 INFO L168 Benchmark]: Toolchain (without parser) took 1556.72 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 53.7 MB in the beginning and 39.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:55,069 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:32:55,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.99 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 53.7 MB in the beginning and 88.8 MB in the end (delta: -35.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:55,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.53 ms. Allocated memory is still 111.1 MB. Free memory was 88.8 MB in the beginning and 87.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:55,071 INFO L168 Benchmark]: Boogie Preprocessor took 25.06 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 86.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:32:55,072 INFO L168 Benchmark]: RCFGBuilder took 515.86 ms. Allocated memory is still 111.1 MB. Free memory was 86.2 MB in the beginning and 67.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:55,073 INFO L168 Benchmark]: TraceAbstraction took 652.67 ms. Allocated memory is still 111.1 MB. Free memory was 66.9 MB in the beginning and 41.2 MB in the end (delta: 25.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:32:55,073 INFO L168 Benchmark]: Witness Printer took 42.21 ms. Allocated memory is still 111.1 MB. Free memory was 41.2 MB in the beginning and 39.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:32:55,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.99 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 53.7 MB in the beginning and 88.8 MB in the end (delta: -35.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.53 ms. Allocated memory is still 111.1 MB. Free memory was 88.8 MB in the beginning and 87.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.06 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 86.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 515.86 ms. Allocated memory is still 111.1 MB. Free memory was 86.2 MB in the beginning and 67.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 652.67 ms. Allocated memory is still 111.1 MB. Free memory was 66.9 MB in the beginning and 41.2 MB in the end (delta: 25.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Witness Printer took 42.21 ms. Allocated memory is still 111.1 MB. Free memory was 41.2 MB in the beginning and 39.6 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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