./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-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_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/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 54165abed718b8d39f88748583b76365fb540324 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:39:49,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:39:49,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:39:49,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:39:49,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:39:49,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:39:49,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:39:49,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:39:49,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:39:49,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:39:49,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:39:49,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:39:49,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:39:49,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:39:49,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:39:49,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:39:49,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:39:49,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:39:49,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:39:49,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:39:49,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:39:49,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:39:49,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:39:49,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:39:49,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:39:49,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:39:49,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:39:49,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:39:49,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:39:49,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:39:49,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:39:49,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:39:49,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:39:49,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:39:49,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:39:49,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:39:49,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:39:49,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:39:49,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:39:49,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:39:49,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:39:49,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:39:49,325 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:39:49,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:39:49,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:39:49,326 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:39:49,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:39:49,327 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:39:49,327 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:39:49,327 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:39:49,327 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:39:49,328 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:39:49,328 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:39:49,328 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:39:49,328 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:39:49,329 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:39:49,329 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:39:49,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:39:49,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:39:49,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:39:49,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:39:49,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:39:49,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:39:49,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:39:49,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:39:49,331 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:39:49,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:39:49,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:39:49,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:39:49,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:39:49,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:39:49,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:39:49,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:39:49,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:39:49,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:39:49,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:39:49,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:39:49,334 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:39:49,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:39:49,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:39:49,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:39:49,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:39:49,335 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_414c23df-1515-4398-ab14-da84a33837f0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54165abed718b8d39f88748583b76365fb540324 [2020-11-28 07:39:49,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:39:49,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:39:49,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:39:49,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:39:49,644 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:39:49,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2020-11-28 07:39:49,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/data/e32d96e20/c12c164dd5294505b9bf9dfc51bfe39b/FLAGd7e22ab11 [2020-11-28 07:39:50,302 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:39:50,303 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2020-11-28 07:39:50,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/data/e32d96e20/c12c164dd5294505b9bf9dfc51bfe39b/FLAGd7e22ab11 [2020-11-28 07:39:50,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/data/e32d96e20/c12c164dd5294505b9bf9dfc51bfe39b [2020-11-28 07:39:50,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:39:50,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:39:50,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:50,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:39:50,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:39:50,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:50" (1/1) ... [2020-11-28 07:39:50,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1921340c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:50, skipping insertion in model container [2020-11-28 07:39:50,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:50" (1/1) ... [2020-11-28 07:39:50,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:39:50,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:39:51,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:51,041 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:39:51,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:51,189 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:39:51,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51 WrapperNode [2020-11-28 07:39:51,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:51,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:51,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:39:51,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:39:51,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:51,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:39:51,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:39:51,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:39:51,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... [2020-11-28 07:39:51,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:39:51,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:39:51,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:39:51,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:39:51,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/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 07:39:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:39:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:39:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:39:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:39:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:39:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:39:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:39:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:39:51,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:39:51,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:39:52,761 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:39:52,761 INFO L298 CfgBuilder]: Removed 101 assume(true) statements. [2020-11-28 07:39:52,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:52 BoogieIcfgContainer [2020-11-28 07:39:52,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:39:52,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:39:52,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:39:52,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:39:52,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:39:50" (1/3) ... [2020-11-28 07:39:52,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0ea671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:52, skipping insertion in model container [2020-11-28 07:39:52,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:51" (2/3) ... [2020-11-28 07:39:52,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0ea671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:52, skipping insertion in model container [2020-11-28 07:39:52,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:52" (3/3) ... [2020-11-28 07:39:52,772 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-11-28 07:39:52,784 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:39:52,788 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-11-28 07:39:52,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-11-28 07:39:52,825 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:39:52,825 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:39:52,825 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:39:52,826 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:39:52,826 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:39:52,826 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:39:52,826 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:39:52,826 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:39:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-11-28 07:39:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:39:52,848 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:52,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:39:52,850 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1148796263, now seen corresponding path program 1 times [2020-11-28 07:39:52,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:52,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827646893] [2020-11-28 07:39:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:52,990 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 07:39:52,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827646893] [2020-11-28 07:39:52,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:52,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:39:52,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129165435] [2020-11-28 07:39:52,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:39:52,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:53,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:39:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:39:53,013 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 2 states. [2020-11-28 07:39:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:53,041 INFO L93 Difference]: Finished difference Result 204 states and 332 transitions. [2020-11-28 07:39:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:39:53,042 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 07:39:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:53,051 INFO L225 Difference]: With dead ends: 204 [2020-11-28 07:39:53,052 INFO L226 Difference]: Without dead ends: 92 [2020-11-28 07:39:53,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:39:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-28 07:39:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-11-28 07:39:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-28 07:39:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2020-11-28 07:39:53,095 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 6 [2020-11-28 07:39:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:53,096 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2020-11-28 07:39:53,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:39:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2020-11-28 07:39:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:39:53,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:53,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:53,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:39:53,097 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1890490466, now seen corresponding path program 1 times [2020-11-28 07:39:53,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:53,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508573306] [2020-11-28 07:39:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:53,154 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 07:39:53,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508573306] [2020-11-28 07:39:53,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:53,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:39:53,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565449675] [2020-11-28 07:39:53,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:39:53,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:53,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:39:53,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:39:53,158 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 3 states. [2020-11-28 07:39:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:53,195 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-11-28 07:39:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:39:53,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-28 07:39:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:53,198 INFO L225 Difference]: With dead ends: 183 [2020-11-28 07:39:53,198 INFO L226 Difference]: Without dead ends: 94 [2020-11-28 07:39:53,204 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 07:39:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-28 07:39:53,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-11-28 07:39:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-28 07:39:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-11-28 07:39:53,221 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 7 [2020-11-28 07:39:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:53,221 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-11-28 07:39:53,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:39:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-11-28 07:39:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:39:53,223 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:53,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:53,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:39:53,228 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2016871065, now seen corresponding path program 1 times [2020-11-28 07:39:53,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:53,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422783972] [2020-11-28 07:39:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:53,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422783972] [2020-11-28 07:39:53,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:53,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:39:53,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056559324] [2020-11-28 07:39:53,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:53,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:53,353 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 4 states. [2020-11-28 07:39:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:53,488 INFO L93 Difference]: Finished difference Result 245 states and 264 transitions. [2020-11-28 07:39:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:39:53,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:39:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:53,491 INFO L225 Difference]: With dead ends: 245 [2020-11-28 07:39:53,491 INFO L226 Difference]: Without dead ends: 236 [2020-11-28 07:39:53,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:39:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-28 07:39:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 95. [2020-11-28 07:39:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-28 07:39:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-11-28 07:39:53,505 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 9 [2020-11-28 07:39:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:53,506 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-11-28 07:39:53,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-11-28 07:39:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:39:53,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:53,507 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:53,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:39:53,507 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1283505281, now seen corresponding path program 1 times [2020-11-28 07:39:53,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:53,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634217431] [2020-11-28 07:39:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:39:53,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634217431] [2020-11-28 07:39:53,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:53,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:39:53,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974745348] [2020-11-28 07:39:53,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:39:53,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:53,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:39:53,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:39:53,646 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 5 states. [2020-11-28 07:39:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:53,856 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2020-11-28 07:39:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:39:53,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 07:39:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:53,857 INFO L225 Difference]: With dead ends: 126 [2020-11-28 07:39:53,857 INFO L226 Difference]: Without dead ends: 123 [2020-11-28 07:39:53,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:39:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-28 07:39:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-11-28 07:39:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-28 07:39:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-11-28 07:39:53,865 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 16 [2020-11-28 07:39:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:53,865 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-11-28 07:39:53,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:39:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-11-28 07:39:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:39:53,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:53,866 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:53,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:39:53,869 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash -343480048, now seen corresponding path program 1 times [2020-11-28 07:39:53,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:53,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860666507] [2020-11-28 07:39:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:39:53,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860666507] [2020-11-28 07:39:53,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:53,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:39:53,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117297990] [2020-11-28 07:39:53,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:39:53,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:39:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:39:53,998 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 5 states. [2020-11-28 07:39:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:54,238 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-11-28 07:39:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:39:54,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 07:39:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:54,239 INFO L225 Difference]: With dead ends: 92 [2020-11-28 07:39:54,239 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 07:39:54,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:39:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 07:39:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-11-28 07:39:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-28 07:39:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-11-28 07:39:54,250 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 16 [2020-11-28 07:39:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:54,251 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-11-28 07:39:54,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:39:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-11-28 07:39:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:39:54,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:54,253 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:54,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:39:54,253 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1261536112, now seen corresponding path program 1 times [2020-11-28 07:39:54,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:54,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522627686] [2020-11-28 07:39:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:54,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522627686] [2020-11-28 07:39:54,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:54,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:39:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129198212] [2020-11-28 07:39:54,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:39:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:39:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:39:54,380 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-11-28 07:39:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:54,660 INFO L93 Difference]: Finished difference Result 215 states and 231 transitions. [2020-11-28 07:39:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:39:54,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-28 07:39:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:54,663 INFO L225 Difference]: With dead ends: 215 [2020-11-28 07:39:54,663 INFO L226 Difference]: Without dead ends: 212 [2020-11-28 07:39:54,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:39:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-11-28 07:39:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 95. [2020-11-28 07:39:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-28 07:39:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-11-28 07:39:54,682 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 19 [2020-11-28 07:39:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:54,683 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-11-28 07:39:54,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:39:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-11-28 07:39:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:39:54,684 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:54,684 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:54,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:39:54,684 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:54,685 INFO L82 PathProgramCache]: Analyzing trace with hash -901138341, now seen corresponding path program 1 times [2020-11-28 07:39:54,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:54,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807042096] [2020-11-28 07:39:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:54,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807042096] [2020-11-28 07:39:54,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:54,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:39:54,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089720206] [2020-11-28 07:39:54,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:39:54,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:39:54,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:39:54,779 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 5 states. [2020-11-28 07:39:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:55,047 INFO L93 Difference]: Finished difference Result 212 states and 228 transitions. [2020-11-28 07:39:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:39:55,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-28 07:39:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:55,050 INFO L225 Difference]: With dead ends: 212 [2020-11-28 07:39:55,050 INFO L226 Difference]: Without dead ends: 209 [2020-11-28 07:39:55,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:39:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-28 07:39:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 101. [2020-11-28 07:39:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-28 07:39:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-11-28 07:39:55,059 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 19 [2020-11-28 07:39:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:55,059 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-11-28 07:39:55,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:39:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-11-28 07:39:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 07:39:55,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:55,060 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:55,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:39:55,061 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -243684074, now seen corresponding path program 1 times [2020-11-28 07:39:55,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:55,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870078834] [2020-11-28 07:39:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:39:55,108 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:39:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:39:55,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:39:55,171 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:39:55,172 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:39:55,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:39:55,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:39:55 BoogieIcfgContainer [2020-11-28 07:39:55,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:39:55,227 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:39:55,227 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:39:55,227 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:39:55,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:52" (3/4) ... [2020-11-28 07:39:55,230 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:39:55,323 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_414c23df-1515-4398-ab14-da84a33837f0/bin/utaipan/witness.graphml [2020-11-28 07:39:55,327 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:39:55,329 INFO L168 Benchmark]: Toolchain (without parser) took 4724.88 ms. Allocated memory was 83.9 MB in the beginning and 121.6 MB in the end (delta: 37.7 MB). Free memory was 49.6 MB in the beginning and 94.8 MB in the end (delta: -45.2 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:55,330 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:55,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 585.38 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.5 MB in the beginning and 62.9 MB in the end (delta: -13.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:55,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.74 ms. Allocated memory is still 100.7 MB. Free memory was 62.9 MB in the beginning and 60.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:55,336 INFO L168 Benchmark]: Boogie Preprocessor took 69.91 ms. Allocated memory is still 100.7 MB. Free memory was 60.0 MB in the beginning and 57.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:55,337 INFO L168 Benchmark]: RCFGBuilder took 1437.15 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.1 MB in the beginning and 96.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:55,338 INFO L168 Benchmark]: TraceAbstraction took 2460.70 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 36.8 MB in the end (delta: 59.1 MB). Peak memory consumption was 59.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:55,338 INFO L168 Benchmark]: Witness Printer took 100.38 ms. Allocated memory is still 121.6 MB. Free memory was 36.8 MB in the beginning and 94.8 MB in the end (delta: -58.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:55,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 585.38 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.5 MB in the beginning and 62.9 MB in the end (delta: -13.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.74 ms. Allocated memory is still 100.7 MB. Free memory was 62.9 MB in the beginning and 60.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.91 ms. Allocated memory is still 100.7 MB. Free memory was 60.0 MB in the beginning and 57.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1437.15 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.1 MB in the beginning and 96.0 MB in the end (delta: -38.9 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2460.70 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 36.8 MB in the end (delta: 59.1 MB). Peak memory consumption was 59.7 MB. Max. memory is 16.1 GB. * Witness Printer took 100.38 ms. Allocated memory is still 121.6 MB. Free memory was 36.8 MB in the beginning and 94.8 MB in the end (delta: -58.0 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: [L638] struct list *data = ((void *)0); [L639] COND TRUE __VERIFIER_nondet_int() [L640] struct node *node = malloc(sizeof *node); [L641] COND FALSE !(!node) [L643] node->next = node [L644] node->value = __VERIFIER_nondet_int() [L645] struct list *item = malloc(sizeof *item); [L646] COND FALSE !(!item) [L648] item->slist = node [L649] item->next = data [L650] data = item [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) [L615] COND FALSE !(!(shape)) [L616] shape->next [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) [L623] EXPR shape->next [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "merge_sort-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 110 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 567 SDtfs, 815 SDslu, 906 SDs, 0 SdLazy, 420 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=0, 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, 7 MinimizatonAttempts, 397 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 7271 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 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...