./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum04-1.i --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_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/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 a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 .................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:42:26,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:42:26,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:42:26,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:42:26,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:42:26,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:42:26,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:42:26,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:42:26,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:42:26,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:42:26,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:42:26,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:42:26,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:42:26,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:42:26,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:42:26,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:42:26,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:42:26,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:42:26,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:42:26,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:42:26,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:42:26,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:42:26,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:42:26,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:42:26,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:42:26,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:42:26,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:42:26,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:42:26,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:42:26,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:42:26,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:42:26,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:42:26,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:42:26,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:42:26,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:42:26,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:42:26,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:42:26,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:42:26,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:42:26,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:42:26,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:42:26,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:42:26,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:42:26,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:42:26,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:42:26,316 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:42:26,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:42:26,316 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:42:26,316 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:42:26,317 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:42:26,317 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:42:26,317 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:42:26,317 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:42:26,317 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:42:26,318 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:42:26,318 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:42:26,318 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:42:26,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:42:26,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:42:26,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:42:26,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:42:26,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:42:26,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:42:26,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:42:26,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:42:26,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:42:26,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:42:26,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:42:26,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:42:26,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:42:26,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:42:26,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:42:26,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:42:26,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:26,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:42:26,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:42:26,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:42:26,323 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:42:26,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:42:26,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:42:26,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:42:26,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:42:26,323 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_244af946-dda7-4e0d-83c0-ed1d7f972e19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 [2020-11-28 07:42:26,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:42:26,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:42:26,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:42:26,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:42:26,595 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:42:26,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/../../sv-benchmarks/c/loops/sum04-1.i [2020-11-28 07:42:26,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/data/f860f05b7/21b097c6ecaa4d8f87ae72cf14bd2f59/FLAG4c73508be [2020-11-28 07:42:27,267 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:42:27,267 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/sv-benchmarks/c/loops/sum04-1.i [2020-11-28 07:42:27,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/data/f860f05b7/21b097c6ecaa4d8f87ae72cf14bd2f59/FLAG4c73508be [2020-11-28 07:42:27,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/data/f860f05b7/21b097c6ecaa4d8f87ae72cf14bd2f59 [2020-11-28 07:42:27,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:42:27,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:42:27,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:27,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:42:27,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:42:27,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78fc7376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27, skipping insertion in model container [2020-11-28 07:42:27,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:42:27,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:42:27,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:27,866 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:42:27,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:27,899 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:42:27,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27 WrapperNode [2020-11-28 07:42:27,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:27,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:27,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:42:27,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:42:27,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:27,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:42:27,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:42:27,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:42:27,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:42:27,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:42:27,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:42:27,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:42:27,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/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 07:42:28,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:42:28,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:42:28,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:42:28,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:42:28,368 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:42:28,368 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:42:28,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:28 BoogieIcfgContainer [2020-11-28 07:42:28,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:42:28,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:42:28,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:42:28,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:42:28,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:42:27" (1/3) ... [2020-11-28 07:42:28,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764220ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:28, skipping insertion in model container [2020-11-28 07:42:28,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (2/3) ... [2020-11-28 07:42:28,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764220ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:28, skipping insertion in model container [2020-11-28 07:42:28,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:28" (3/3) ... [2020-11-28 07:42:28,399 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-11-28 07:42:28,412 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:42:28,416 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:42:28,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:42:28,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:42:28,458 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:42:28,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:42:28,459 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:42:28,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:42:28,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:42:28,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:42:28,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:42:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-11-28 07:42:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:42:28,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:28,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:42:28,481 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:28,489 INFO L82 PathProgramCache]: Analyzing trace with hash 69784008, now seen corresponding path program 1 times [2020-11-28 07:42:28,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:28,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375544841] [2020-11-28 07:42:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:28,671 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 07:42:28,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375544841] [2020-11-28 07:42:28,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:28,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:28,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670576709] [2020-11-28 07:42:28,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:28,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:28,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:28,699 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-11-28 07:42:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:28,734 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-11-28 07:42:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:28,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-28 07:42:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:28,748 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:42:28,749 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 07:42:28,752 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 07:42:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 07:42:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 07:42:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 07:42:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-28 07:42:28,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-11-28 07:42:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:28,781 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-28 07:42:28,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-28 07:42:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:42:28,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:28,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:42:28,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:42:28,783 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2128790618, now seen corresponding path program 1 times [2020-11-28 07:42:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:28,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897069531] [2020-11-28 07:42:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:28,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897069531] [2020-11-28 07:42:28,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253872271] [2020-11-28 07:42:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/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 [2020-11-28 07:42:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:42:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:42:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:28,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:42:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:29,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234099223] [2020-11-28 07:42:29,049 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:42:29,049 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:42:29,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:42:29,058 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:42:29,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:42:29,430 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:42:29,559 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-11-28 07:42:29,738 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:29,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:42:29,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-11-28 07:42:29,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456007537] [2020-11-28 07:42:29,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:42:29,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:29,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:42:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:42:29,742 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2020-11-28 07:42:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:29,775 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-28 07:42:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:42:29,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2020-11-28 07:42:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:29,777 INFO L225 Difference]: With dead ends: 14 [2020-11-28 07:42:29,777 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:42:29,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:42:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:42:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 07:42:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:42:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-28 07:42:29,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2020-11-28 07:42:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:29,781 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-28 07:42:29,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:42:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-28 07:42:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:42:29,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:29,782 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2020-11-28 07:42:30,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:42:30,000 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash -756852408, now seen corresponding path program 2 times [2020-11-28 07:42:30,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:30,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156287594] [2020-11-28 07:42:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:30,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156287594] [2020-11-28 07:42:30,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037147827] [2020-11-28 07:42:30,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:30,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 07:42:30,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:42:30,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:42:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:42:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:30,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:42:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:30,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623965742] [2020-11-28 07:42:30,261 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:42:30,261 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:42:30,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:42:30,262 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:42:30,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:42:30,426 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:42:30,713 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:30,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:42:30,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-11-28 07:42:30,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147312198] [2020-11-28 07:42:30,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 07:42:30,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:30,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 07:42:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:42:30,716 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 11 states. [2020-11-28 07:42:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:30,752 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-11-28 07:42:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 07:42:30,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-11-28 07:42:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:30,755 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:42:30,755 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:42:30,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:42:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:42:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-28 07:42:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:42:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-28 07:42:30,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2020-11-28 07:42:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:30,759 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-28 07:42:30,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 07:42:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-28 07:42:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:42:30,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:30,763 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1] [2020-11-28 07:42:30,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:42:30,964 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash 705568968, now seen corresponding path program 3 times [2020-11-28 07:42:30,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:30,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077267961] [2020-11-28 07:42:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:30,991 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:31,013 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:31,030 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:42:31,030 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:42:31,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 07:42:31,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:42:31 BoogieIcfgContainer [2020-11-28 07:42:31,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:42:31,057 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:42:31,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:42:31,057 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:42:31,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:28" (3/4) ... [2020-11-28 07:42:31,060 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:42:31,105 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_244af946-dda7-4e0d-83c0-ed1d7f972e19/bin/utaipan/witness.graphml [2020-11-28 07:42:31,105 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:42:31,107 INFO L168 Benchmark]: Toolchain (without parser) took 3468.79 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 94.1 MB in the beginning and 41.1 MB in the end (delta: 53.0 MB). Peak memory consumption was 78.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:31,107 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory is still 43.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:31,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.77 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 95.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:31,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.74 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 93.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:31,110 INFO L168 Benchmark]: Boogie Preprocessor took 22.30 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:31,111 INFO L168 Benchmark]: RCFGBuilder took 407.36 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 78.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:31,112 INFO L168 Benchmark]: TraceAbstraction took 2683.86 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 78.3 MB in the beginning and 43.2 MB in the end (delta: 35.1 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:31,112 INFO L168 Benchmark]: Witness Printer took 48.72 ms. Allocated memory is still 144.7 MB. Free memory was 43.2 MB in the beginning and 41.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:31,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory is still 43.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.77 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 95.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.74 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 93.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.30 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 407.36 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 78.6 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2683.86 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 78.3 MB in the beginning and 43.2 MB in the end (delta: 35.1 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.1 GB. * Witness Printer took 48.72 ms. Allocated memory is still 144.7 MB. Free memory was 43.2 MB in the beginning and 41.1 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: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L15] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 8, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 17 SDs, 0 SdLazy, 21 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 591 SizeOfPredicates, 2 NumberOfNonLiveVariables, 96 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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...