./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 50bdaf600d03af0a677a59daf6a875dbe69c10b2 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:23:58,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:23:58,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:23:58,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:23:58,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:23:58,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:23:58,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:23:58,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:23:58,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:23:58,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:23:58,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:23:58,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:23:58,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:23:58,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:23:58,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:23:58,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:23:58,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:23:58,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:23:58,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:23:58,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:23:58,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:23:58,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:23:58,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:23:58,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:23:58,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:23:58,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:23:58,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:23:58,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:23:58,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:23:58,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:23:58,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:23:58,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:23:58,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:23:58,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:23:58,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:23:58,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:23:58,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:23:58,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:23:58,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:23:58,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:23:58,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:23:58,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:23:58,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:23:58,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:23:58,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:23:58,343 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:23:58,343 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:23:58,344 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:23:58,344 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:23:58,344 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:23:58,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:23:58,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:23:58,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:23:58,347 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:23:58,347 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:23:58,347 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:23:58,348 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:23:58,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:23:58,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:23:58,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:23:58,350 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:23:58,350 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:23:58,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:23:58,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:23:58,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:23:58,351 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:23:58,351 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:23:58,352 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:23:58,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:23:58,352 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:23:58,352 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:23:58,353 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:23:58,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:23:58,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:23:58,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:23:58,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:23:58,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:23:58,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:23:58,355 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:23:58,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:23:58,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:23:58,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:23:58,356 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_552046c4-e047-45a8-ac7d-a094fbf1c3c2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50bdaf600d03af0a677a59daf6a875dbe69c10b2 [2020-11-28 07:23:58,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:23:58,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:23:58,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:23:58,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:23:58,769 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:23:58,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-11-28 07:23:58,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/data/b6e279f6f/f3d85c96302b42ce88b597bce39aab4b/FLAGe782545fb [2020-11-28 07:23:59,600 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:23:59,601 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-11-28 07:23:59,619 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/data/b6e279f6f/f3d85c96302b42ce88b597bce39aab4b/FLAGe782545fb [2020-11-28 07:23:59,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/data/b6e279f6f/f3d85c96302b42ce88b597bce39aab4b [2020-11-28 07:23:59,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:23:59,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:23:59,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:23:59,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:23:59,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:23:59,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:23:59" (1/1) ... [2020-11-28 07:23:59,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47722234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:23:59, skipping insertion in model container [2020-11-28 07:23:59,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:23:59" (1/1) ... [2020-11-28 07:23:59,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:23:59,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:24:00,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:00,308 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:24:00,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:00,424 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:24:00,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00 WrapperNode [2020-11-28 07:24:00,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:00,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:00,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:24:00,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:24:00,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:00,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:24:00,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:24:00,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:24:00,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... [2020-11-28 07:24:00,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:24:00,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:24:00,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:24:00,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:24:00,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/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 07:24:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:24:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:24:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:24:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:24:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:24:00,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:24:01,276 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:24:01,277 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-28 07:24:01,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:01 BoogieIcfgContainer [2020-11-28 07:24:01,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:24:01,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:24:01,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:24:01,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:24:01,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:23:59" (1/3) ... [2020-11-28 07:24:01,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777e575e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:01, skipping insertion in model container [2020-11-28 07:24:01,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:00" (2/3) ... [2020-11-28 07:24:01,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777e575e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:01, skipping insertion in model container [2020-11-28 07:24:01,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:01" (3/3) ... [2020-11-28 07:24:01,295 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2020-11-28 07:24:01,309 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:24:01,314 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-28 07:24:01,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-28 07:24:01,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:24:01,355 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:24:01,355 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:24:01,355 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:24:01,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:24:01,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:24:01,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:24:01,356 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:24:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-28 07:24:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:24:01,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:01,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:24:01,380 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 104334, now seen corresponding path program 1 times [2020-11-28 07:24:01,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:01,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776538136] [2020-11-28 07:24:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:01,576 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 07:24:01,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776538136] [2020-11-28 07:24:01,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:01,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:24:01,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818903705] [2020-11-28 07:24:01,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:24:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:01,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:24:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:01,600 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-28 07:24:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:01,685 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-11-28 07:24:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:24:01,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:24:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:01,701 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:24:01,701 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 07:24:01,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 07:24:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 07:24:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 07:24:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:24:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-28 07:24:01,752 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 3 [2020-11-28 07:24:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:01,753 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-28 07:24:01,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:24:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-28 07:24:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:24:01,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:01,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:24:01,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:24:01,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 104335, now seen corresponding path program 1 times [2020-11-28 07:24:01,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:01,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210017482] [2020-11-28 07:24:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:01,912 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 07:24:01,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210017482] [2020-11-28 07:24:01,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:01,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:24:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001596277] [2020-11-28 07:24:01,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:24:01,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:01,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:24:01,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:24:01,917 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-11-28 07:24:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:02,099 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-28 07:24:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:24:02,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:24:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:02,101 INFO L225 Difference]: With dead ends: 40 [2020-11-28 07:24:02,102 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 07:24:02,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 07:24:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-11-28 07:24:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 07:24:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-28 07:24:02,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 3 [2020-11-28 07:24:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:02,110 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-28 07:24:02,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:24:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-28 07:24:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:24:02,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:02,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:24:02,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:24:02,111 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash 106111, now seen corresponding path program 1 times [2020-11-28 07:24:02,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:02,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905641127] [2020-11-28 07:24:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:02,267 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 07:24:02,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905641127] [2020-11-28 07:24:02,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:02,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:24:02,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323079586] [2020-11-28 07:24:02,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:24:02,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:24:02,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:02,271 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-11-28 07:24:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:02,308 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-28 07:24:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:24:02,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:24:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:02,310 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:24:02,310 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:24:02,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 07:24:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:24:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 07:24:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:24:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-28 07:24:02,315 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2020-11-28 07:24:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:02,315 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-28 07:24:02,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:24:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-28 07:24:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:24:02,316 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:02,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:24:02,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:24:02,316 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:02,317 INFO L82 PathProgramCache]: Analyzing trace with hash 3290841, now seen corresponding path program 1 times [2020-11-28 07:24:02,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:02,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840388488] [2020-11-28 07:24:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:02,423 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 07:24:02,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840388488] [2020-11-28 07:24:02,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:02,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:24:02,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607248556] [2020-11-28 07:24:02,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:24:02,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:02,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:24:02,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:02,426 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2020-11-28 07:24:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:02,480 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-28 07:24:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:24:02,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:24:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:02,481 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:24:02,482 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 07:24:02,482 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 07:24:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 07:24:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 07:24:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:24:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-28 07:24:02,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-11-28 07:24:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:02,487 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-28 07:24:02,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:24:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-28 07:24:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:24:02,488 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:02,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:24:02,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:24:02,489 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash 3290842, now seen corresponding path program 1 times [2020-11-28 07:24:02,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:02,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565568577] [2020-11-28 07:24:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:02,712 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 07:24:02,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565568577] [2020-11-28 07:24:02,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:02,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:24:02,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372886392] [2020-11-28 07:24:02,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:24:02,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:02,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:24:02,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:24:02,715 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-11-28 07:24:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:02,827 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-11-28 07:24:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:24:02,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-28 07:24:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:02,828 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:24:02,829 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:24:02,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:24:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:24:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:24:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-28 07:24:02,832 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-11-28 07:24:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:02,833 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-28 07:24:02,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:24:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-28 07:24:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:24:02,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:02,834 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-28 07:24:02,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:24:02,834 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash 100314532, now seen corresponding path program 1 times [2020-11-28 07:24:02,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:02,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87830544] [2020-11-28 07:24:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:02,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87830544] [2020-11-28 07:24:02,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293221874] [2020-11-28 07:24:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/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 07:24:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:03,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:24:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:03,144 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 07:24:03,148 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:24:03,166 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:24:03,166 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:24:03,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 07:24:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:03,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:03,381 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-28 07:24:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:03,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321044194] [2020-11-28 07:24:03,494 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-28 07:24:03,494 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:03,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:03,506 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:03,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:04,328 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:24:04,479 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-11-28 07:24:04,903 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-28 07:24:05,051 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-11-28 07:24:05,053 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:05,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:24:05,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-11-28 07:24:05,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348304433] [2020-11-28 07:24:05,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 07:24:05,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 07:24:05,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:24:05,058 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 11 states. [2020-11-28 07:24:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:05,360 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-11-28 07:24:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:24:05,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2020-11-28 07:24:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:05,362 INFO L225 Difference]: With dead ends: 42 [2020-11-28 07:24:05,362 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 07:24:05,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:24:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 07:24:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 15. [2020-11-28 07:24:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:24:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-28 07:24:05,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2020-11-28 07:24:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:05,366 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-28 07:24:05,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 07:24:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-28 07:24:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:24:05,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:05,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:05,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 07:24:05,568 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash -746792725, now seen corresponding path program 1 times [2020-11-28 07:24:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:05,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137592020] [2020-11-28 07:24:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:05,698 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 07:24:05,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137592020] [2020-11-28 07:24:05,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:05,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:24:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178349991] [2020-11-28 07:24:05,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:24:05,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:24:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:24:05,700 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-28 07:24:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:05,725 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-28 07:24:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:24:05,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:24:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:05,726 INFO L225 Difference]: With dead ends: 14 [2020-11-28 07:24:05,727 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:24:05,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:24:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:24:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:24:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:24:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-28 07:24:05,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-11-28 07:24:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:05,730 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-28 07:24:05,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:24:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-28 07:24:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:24:05,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:05,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:05,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-28 07:24:05,731 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:05,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:05,732 INFO L82 PathProgramCache]: Analyzing trace with hash -407205654, now seen corresponding path program 1 times [2020-11-28 07:24:05,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:05,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56222455] [2020-11-28 07:24:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:05,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56222455] [2020-11-28 07:24:05,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:05,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:24:05,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524486749] [2020-11-28 07:24:05,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:24:05,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:24:05,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:24:05,912 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-11-28 07:24:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:06,067 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-28 07:24:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:24:06,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-28 07:24:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:06,068 INFO L225 Difference]: With dead ends: 17 [2020-11-28 07:24:06,068 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:24:06,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:24:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:24:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-28 07:24:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:24:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-28 07:24:06,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-11-28 07:24:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:06,070 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-28 07:24:06,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:24:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-28 07:24:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:24:06,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:06,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:06,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-28 07:24:06,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash -286393537, now seen corresponding path program 1 times [2020-11-28 07:24:06,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:06,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013351450] [2020-11-28 07:24:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013351450] [2020-11-28 07:24:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242027445] [2020-11-28 07:24:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/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 07:24:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 07:24:06,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:06,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:06,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563378479] [2020-11-28 07:24:06,494 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-28 07:24:06,494 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:06,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:06,495 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:06,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:06,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:06,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:07,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:07,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:07,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:07,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:07,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:07,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:07,612 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-28 07:24:07,919 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-11-28 07:24:08,214 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-28 07:24:08,402 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-28 07:24:08,539 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-28 07:24:08,790 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-28 07:24:08,847 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:24:09,104 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-28 07:24:09,371 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-28 07:24:09,987 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-11-28 07:24:10,205 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-28 07:24:10,489 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-28 07:24:10,490 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:10,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:24:10,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-28 07:24:10,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471216314] [2020-11-28 07:24:10,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:24:10,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:24:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:24:10,492 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 12 states. [2020-11-28 07:24:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:10,723 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-28 07:24:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:24:10,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-11-28 07:24:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:10,724 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:24:10,724 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:24:10,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-11-28 07:24:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:24:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-11-28 07:24:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:24:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-28 07:24:10,726 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-11-28 07:24:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:10,726 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-28 07:24:10,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:24:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-28 07:24:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:24:10,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:10,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:10,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-28 07:24:10,939 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:24:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:10,941 INFO L82 PathProgramCache]: Analyzing trace with hash 403880869, now seen corresponding path program 2 times [2020-11-28 07:24:10,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:10,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661578131] [2020-11-28 07:24:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:11,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661578131] [2020-11-28 07:24:11,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725443535] [2020-11-28 07:24:11,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:11,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 07:24:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:24:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-28 07:24:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:24:11,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:24:11,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1811620650] [2020-11-28 07:24:11,986 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-28 07:24:11,986 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:11,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:11,986 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:11,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:12,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:12,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:12,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:12,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:12,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:12,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:12,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:12,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:13,135 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-11-28 07:24:13,728 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:24:13,979 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-28 07:24:14,287 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-11-28 07:24:14,615 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-11-28 07:24:14,825 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-28 07:24:15,045 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-28 07:24:15,047 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:15,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:24:15,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2020-11-28 07:24:15,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112419756] [2020-11-28 07:24:15,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-28 07:24:15,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:15,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-28 07:24:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-11-28 07:24:15,049 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 22 states. [2020-11-28 07:24:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:15,801 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-28 07:24:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 07:24:15,802 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2020-11-28 07:24:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:15,802 INFO L225 Difference]: With dead ends: 30 [2020-11-28 07:24:15,802 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:24:15,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2020-11-28 07:24:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:24:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:24:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:24:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:24:15,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-28 07:24:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:15,803 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:24:15,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-28 07:24:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:24:15,803 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:24:16,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:16,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:24:16 BoogieIcfgContainer [2020-11-28 07:24:16,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:24:16,008 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:24:16,008 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:24:16,008 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:24:16,009 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:01" (3/4) ... [2020-11-28 07:24:16,011 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:24:16,020 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-28 07:24:16,020 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-28 07:24:16,020 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:24:16,069 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_552046c4-e047-45a8-ac7d-a094fbf1c3c2/bin/utaipan/witness.graphml [2020-11-28 07:24:16,070 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:24:16,070 INFO L168 Benchmark]: Toolchain (without parser) took 16211.34 ms. Allocated memory was 146.8 MB in the beginning and 308.3 MB in the end (delta: 161.5 MB). Free memory was 122.2 MB in the beginning and 152.1 MB in the end (delta: -29.9 MB). Peak memory consumption was 130.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:16,071 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:16,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 564.49 ms. Allocated memory is still 146.8 MB. Free memory was 121.7 MB in the beginning and 112.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:16,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.35 ms. Allocated memory is still 146.8 MB. Free memory was 112.9 MB in the beginning and 111.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:16,072 INFO L168 Benchmark]: Boogie Preprocessor took 31.47 ms. Allocated memory is still 146.8 MB. Free memory was 111.4 MB in the beginning and 109.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:16,072 INFO L168 Benchmark]: RCFGBuilder took 773.10 ms. Allocated memory is still 146.8 MB. Free memory was 109.8 MB in the beginning and 85.6 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:16,072 INFO L168 Benchmark]: TraceAbstraction took 14719.71 ms. Allocated memory was 146.8 MB in the beginning and 308.3 MB in the end (delta: 161.5 MB). Free memory was 84.7 MB in the beginning and 155.7 MB in the end (delta: -71.1 MB). Peak memory consumption was 92.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:16,073 INFO L168 Benchmark]: Witness Printer took 61.53 ms. Allocated memory is still 308.3 MB. Free memory was 155.7 MB in the beginning and 152.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:16,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 564.49 ms. Allocated memory is still 146.8 MB. Free memory was 121.7 MB in the beginning and 112.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.35 ms. Allocated memory is still 146.8 MB. Free memory was 112.9 MB in the beginning and 111.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.47 ms. Allocated memory is still 146.8 MB. Free memory was 111.4 MB in the beginning and 109.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 773.10 ms. Allocated memory is still 146.8 MB. Free memory was 109.8 MB in the beginning and 85.6 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14719.71 ms. Allocated memory was 146.8 MB in the beginning and 308.3 MB in the end (delta: 161.5 MB). Free memory was 84.7 MB in the beginning and 155.7 MB in the end (delta: -71.1 MB). Peak memory consumption was 92.6 MB. Max. memory is 16.1 GB. * Witness Printer took 61.53 ms. Allocated memory is still 308.3 MB. Free memory was 155.7 MB in the beginning and 152.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.6s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 360 SDslu, 175 SDs, 0 SdLazy, 453 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 10 MinimizatonAttempts, 51 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 113 ConstructedInterpolants, 12 QuantifiedInterpolants, 14073 SizeOfPredicates, 25 NumberOfNonLiveVariables, 229 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 11/37 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 correct! Received shutdown request...