./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI --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 0.2.0-7b2dab5 [2021-10-11 02:33:05,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:05,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:05,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:05,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:05,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:05,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:05,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:05,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:05,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:05,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:05,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:05,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:05,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:05,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:05,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:05,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:05,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:05,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:05,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:05,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:05,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:05,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:05,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:05,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:05,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:05,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:05,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:05,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:05,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:05,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:05,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:05,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:05,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:05,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:05,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:05,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:05,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:05,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:05,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:05,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:05,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:33:05,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:05,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:05,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:05,333 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:05,334 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:05,334 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:05,334 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:33:05,335 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:05,335 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:05,335 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:33:05,335 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:33:05,336 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:05,336 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:33:05,336 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:33:05,337 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:33:05,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:33:05,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:33:05,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:05,338 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:05,339 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:33:05,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:33:05,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:05,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:05,340 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:33:05,340 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:33:05,340 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:33:05,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:05,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:05,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:05,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:05,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:05,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:05,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:05,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:05,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:05,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:33:05,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:33:05,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:05,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:05,344 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_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50bdaf600d03af0a677a59daf6a875dbe69c10b2 [2021-10-11 02:33:05,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:05,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:05,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:05,649 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:05,650 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:05,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-10-11 02:33:05,724 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/data/6528bb01d/a4ede1a8ce0e46298c57ca5abdbbdcdb/FLAG86de16d84 [2021-10-11 02:33:06,343 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:06,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-10-11 02:33:06,369 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/data/6528bb01d/a4ede1a8ce0e46298c57ca5abdbbdcdb/FLAG86de16d84 [2021-10-11 02:33:06,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/data/6528bb01d/a4ede1a8ce0e46298c57ca5abdbbdcdb [2021-10-11 02:33:06,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:06,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:06,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:06,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:06,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:06,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5213a79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:06, skipping insertion in model container [2021-10-11 02:33:06,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:06" (1/1) ... [2021-10-11 02:33:06,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:06,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:07,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:07,142 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:33:07,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:07,268 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:33:07,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07 WrapperNode [2021-10-11 02:33:07,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:07,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:07,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:33:07,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:33:07,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:07,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:33:07,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:33:07,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:33:07,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:33:07,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:33:07,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:33:07,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:33:07,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:33:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:33:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:33:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:33:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:33:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:33:07,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:33:07,902 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:33:07,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:07 BoogieIcfgContainer [2021-10-11 02:33:07,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:33:07,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:33:07,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:33:07,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:33:07,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:06" (1/3) ... [2021-10-11 02:33:07,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d85425b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:07, skipping insertion in model container [2021-10-11 02:33:07,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (2/3) ... [2021-10-11 02:33:07,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d85425b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:07, skipping insertion in model container [2021-10-11 02:33:07,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:07" (3/3) ... [2021-10-11 02:33:07,921 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2021-10-11 02:33:07,942 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:33:07,945 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2021-10-11 02:33:07,955 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-10-11 02:33:07,988 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:33:07,989 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:33:07,989 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:33:07,989 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:33:07,989 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:33:07,989 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:33:07,989 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:33:07,989 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:33:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-10-11 02:33:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:33:08,016 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:33:08,017 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]=== [2021-10-11 02:33:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,023 INFO L82 PathProgramCache]: Analyzing trace with hash 104334, now seen corresponding path program 1 times [2021-10-11 02:33:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607668796] [2021-10-11 02:33:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:08,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607668796] [2021-10-11 02:33:08,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:08,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:33:08,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671804201] [2021-10-11 02:33:08,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:33:08,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:33:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:08,328 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-10-11 02:33:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:08,386 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-10-11 02:33:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:33:08,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:33:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:08,394 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:33:08,395 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:33:08,396 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 [2021-10-11 02:33:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:33:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-11 02:33:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:33:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-11 02:33:08,425 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 3 [2021-10-11 02:33:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:08,425 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-11 02:33:08,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:33:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-11 02:33:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:33:08,426 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:33:08,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:33:08,427 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]=== [2021-10-11 02:33:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash 104335, now seen corresponding path program 1 times [2021-10-11 02:33:08,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700205627] [2021-10-11 02:33:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:08,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700205627] [2021-10-11 02:33:08,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:08,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:33:08,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96764638] [2021-10-11 02:33:08,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:08,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:08,498 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2021-10-11 02:33:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:08,565 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-11 02:33:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:08,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2021-10-11 02:33:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:08,567 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:33:08,567 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 02:33:08,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 02:33:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-10-11 02:33:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:33:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-11 02:33:08,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 3 [2021-10-11 02:33:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:08,573 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-11 02:33:08,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-11 02:33:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:33:08,574 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:33:08,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:33:08,574 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]=== [2021-10-11 02:33:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash 106111, now seen corresponding path program 1 times [2021-10-11 02:33:08,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827512820] [2021-10-11 02:33:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:08,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827512820] [2021-10-11 02:33:08,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:08,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:33:08,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176442931] [2021-10-11 02:33:08,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:33:08,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:33:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:08,641 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2021-10-11 02:33:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:08,677 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-10-11 02:33:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:33:08,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:33:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:08,679 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:33:08,679 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:33:08,679 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 [2021-10-11 02:33:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:33:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 02:33:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:33:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-10-11 02:33:08,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2021-10-11 02:33:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:08,683 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-11 02:33:08,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:33:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-10-11 02:33:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:33:08,683 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:33:08,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:33:08,684 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]=== [2021-10-11 02:33:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash 3290841, now seen corresponding path program 1 times [2021-10-11 02:33:08,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354589992] [2021-10-11 02:33:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:08,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354589992] [2021-10-11 02:33:08,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:08,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:33:08,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308007131] [2021-10-11 02:33:08,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:33:08,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:08,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:33:08,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:08,749 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2021-10-11 02:33:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:08,788 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-10-11 02:33:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:33:08,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:33:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:08,790 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:33:08,790 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:33:08,791 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 [2021-10-11 02:33:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:33:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:33:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:33:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 02:33:08,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2021-10-11 02:33:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:08,795 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 02:33:08,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:33:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 02:33:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:33:08,795 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:33:08,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:33:08,796 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]=== [2021-10-11 02:33:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,797 INFO L82 PathProgramCache]: Analyzing trace with hash 3290842, now seen corresponding path program 1 times [2021-10-11 02:33:08,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422943059] [2021-10-11 02:33:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:08,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422943059] [2021-10-11 02:33:08,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:08,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:33:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305088084] [2021-10-11 02:33:08,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:08,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:08,937 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2021-10-11 02:33:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:08,989 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-10-11 02:33:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:08,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:33:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:08,991 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:33:08,991 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:33:08,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:33:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 02:33:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:33:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-11 02:33:08,995 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2021-10-11 02:33:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:08,995 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-11 02:33:08,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-11 02:33:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:33:08,996 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,996 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:33:08,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:33:08,997 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]=== [2021-10-11 02:33:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash 100314532, now seen corresponding path program 1 times [2021-10-11 02:33:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342711058] [2021-10-11 02:33:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:09,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342711058] [2021-10-11 02:33:09,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231079471] [2021-10-11 02:33:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:33:09,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:09,203 INFO L382 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 [2021-10-11 02:33:09,205 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:33:09,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:33:09,220 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:33:09,221 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:33:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:09,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:09,375 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:33:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:09,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99290062] [2021-10-11 02:33:09,450 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:33:09,450 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:09,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:09,460 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:09,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:09,919 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:10,258 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:10,358 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:10,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:10,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-10-11 02:33:10,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455684543] [2021-10-11 02:33:10,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:33:10,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:10,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:33:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:33:10,361 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 11 states. [2021-10-11 02:33:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:10,552 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-10-11 02:33:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:33:10,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2021-10-11 02:33:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:10,553 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:33:10,553 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 02:33:10,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:33:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 02:33:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 15. [2021-10-11 02:33:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:33:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-11 02:33:10,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2021-10-11 02:33:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:10,557 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-11 02:33:10,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:33:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-11 02:33:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:33:10,557 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:10,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:10,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 02:33:10,770 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]=== [2021-10-11 02:33:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash -746792725, now seen corresponding path program 1 times [2021-10-11 02:33:10,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:10,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606742776] [2021-10-11 02:33:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606742776] [2021-10-11 02:33:10,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:10,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:33:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675214078] [2021-10-11 02:33:10,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:10,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:10,820 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2021-10-11 02:33:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:10,834 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-10-11 02:33:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:10,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:33:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:10,835 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:33:10,836 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:33:10,836 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 [2021-10-11 02:33:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:33:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 02:33:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:33:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-11 02:33:10,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-10-11 02:33:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:10,838 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-11 02:33:10,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-10-11 02:33:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:33:10,839 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:10,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:10,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-11 02:33:10,839 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]=== [2021-10-11 02:33:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:10,840 INFO L82 PathProgramCache]: Analyzing trace with hash -407205654, now seen corresponding path program 1 times [2021-10-11 02:33:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:10,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838680531] [2021-10-11 02:33:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:10,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838680531] [2021-10-11 02:33:10,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:10,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:33:10,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166920792] [2021-10-11 02:33:10,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:33:10,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:10,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:33:10,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:33:10,946 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2021-10-11 02:33:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:11,098 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-10-11 02:33:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:33:11,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-10-11 02:33:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:11,099 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:33:11,099 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:33:11,100 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 [2021-10-11 02:33:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:33:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-11 02:33:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:33:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-11 02:33:11,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2021-10-11 02:33:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:11,103 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-11 02:33:11,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:33:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-11 02:33:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:33:11,103 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:11,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:11,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-11 02:33:11,104 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]=== [2021-10-11 02:33:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:11,105 INFO L82 PathProgramCache]: Analyzing trace with hash -286393537, now seen corresponding path program 1 times [2021-10-11 02:33:11,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:11,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321448224] [2021-10-11 02:33:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:11,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321448224] [2021-10-11 02:33:11,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052382113] [2021-10-11 02:33:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:11,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-11 02:33:11,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:11,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:11,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475650743] [2021-10-11 02:33:11,375 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:11,375 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:11,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:11,376 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:11,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:11,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:11,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:11,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,314 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-10-11 02:33:12,682 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-10-11 02:33:13,247 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:13,435 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:13,647 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:14,068 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:14,258 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:14,468 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:14,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:14,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:14,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-10-11 02:33:14,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005881621] [2021-10-11 02:33:14,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:33:14,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:33:14,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:33:14,506 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 13 states. [2021-10-11 02:33:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:14,759 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-10-11 02:33:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:33:14,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2021-10-11 02:33:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:14,760 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:33:14,760 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:33:14,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:33:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:33:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-10-11 02:33:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:33:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 02:33:14,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-10-11 02:33:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:14,764 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 02:33:14,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:33:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 02:33:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:33:14,765 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:14,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:14,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-11 02:33:14,974 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]=== [2021-10-11 02:33:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:14,975 INFO L82 PathProgramCache]: Analyzing trace with hash 403880869, now seen corresponding path program 2 times [2021-10-11 02:33:14,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:14,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641016193] [2021-10-11 02:33:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:15,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641016193] [2021-10-11 02:33:15,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503554752] [2021-10-11 02:33:15,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:15,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:33:15,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:15,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-11 02:33:15,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:15,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:15,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611295948] [2021-10-11 02:33:15,679 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:15,680 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:15,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:15,680 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:15,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:15,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:15,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,702 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-10-11 02:33:17,195 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:17,384 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:17,617 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:18,059 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:18,238 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:18,427 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:18,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:18,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:18,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-10-11 02:33:18,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104156453] [2021-10-11 02:33:18,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-10-11 02:33:18,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:18,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-11 02:33:18,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-10-11 02:33:18,500 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 21 states. [2021-10-11 02:33:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:18,863 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-10-11 02:33:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:33:18,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 16 [2021-10-11 02:33:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:18,863 INFO L225 Difference]: With dead ends: 31 [2021-10-11 02:33:18,864 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:33:18,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-10-11 02:33:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:33:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-11 02:33:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:33:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-10-11 02:33:18,867 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2021-10-11 02:33:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:18,867 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-10-11 02:33:18,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-10-11 02:33:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-10-11 02:33:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:33:18,868 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:18,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:33:19,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:19,082 INFO L429 AbstractCegarLoop]: === Iteration 11 === [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]=== [2021-10-11 02:33:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash -448860240, now seen corresponding path program 3 times [2021-10-11 02:33:19,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:19,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895144570] [2021-10-11 02:33:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:19,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895144570] [2021-10-11 02:33:19,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276749800] [2021-10-11 02:33:19,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:19,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:33:19,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:19,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-11 02:33:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:19,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:19,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654051735] [2021-10-11 02:33:19,561 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:19,561 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:19,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:19,561 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:19,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:19,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:19,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:19,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:19,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:20,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:20,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:20,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:20,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:20,456 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-10-11 02:33:20,838 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:20,997 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:21,228 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:21,631 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:21,776 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:21,951 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:22,021 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:22,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:22,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2021-10-11 02:33:22,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400276337] [2021-10-11 02:33:22,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-10-11 02:33:22,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-11 02:33:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:33:22,023 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 23 states. [2021-10-11 02:33:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:22,302 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-10-11 02:33:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:33:22,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2021-10-11 02:33:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:22,303 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:33:22,303 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 02:33:22,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-10-11 02:33:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 02:33:22,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-10-11 02:33:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:33:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-11 02:33:22,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-10-11 02:33:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:22,307 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-11 02:33:22,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-10-11 02:33:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-11 02:33:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 02:33:22,310 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:22,310 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-10-11 02:33:22,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:22,511 INFO L429 AbstractCegarLoop]: === Iteration 12 === [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]=== [2021-10-11 02:33:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1290934828, now seen corresponding path program 4 times [2021-10-11 02:33:22,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:22,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433185317] [2021-10-11 02:33:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:22,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433185317] [2021-10-11 02:33:22,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564321518] [2021-10-11 02:33:22,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-11 02:33:22,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682436945] [2021-10-11 02:33:23,218 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:23,218 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:23,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:23,219 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:23,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:23,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:23,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:23,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:23,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:23,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:23,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:23,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:23,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:24,094 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-10-11 02:33:24,419 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:24,596 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:24,841 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:25,198 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:25,399 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:25,595 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:25,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:25,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:25,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2021-10-11 02:33:25,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20050524] [2021-10-11 02:33:25,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-10-11 02:33:25,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-11 02:33:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-10-11 02:33:25,712 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 27 states. [2021-10-11 02:33:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:26,195 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-10-11 02:33:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-11 02:33:26,195 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 23 [2021-10-11 02:33:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:26,196 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:33:26,196 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:33:26,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2021-10-11 02:33:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:33:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-10-11 02:33:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:33:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-11 02:33:26,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2021-10-11 02:33:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:26,200 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-11 02:33:26,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-10-11 02:33:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-11 02:33:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:33:26,201 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:26,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-10-11 02:33:26,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:26,402 INFO L429 AbstractCegarLoop]: === Iteration 13 === [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]=== [2021-10-11 02:33:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash 808197993, now seen corresponding path program 5 times [2021-10-11 02:33:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:26,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040233511] [2021-10-11 02:33:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:26,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040233511] [2021-10-11 02:33:26,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900266250] [2021-10-11 02:33:26,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:26,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-11 02:33:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-11 02:33:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:26,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:27,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909550291] [2021-10-11 02:33:27,058 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:27,058 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:27,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:27,059 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:27,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:27,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:27,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:27,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:27,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:27,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:27,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:27,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:27,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:28,188 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:28,337 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:28,531 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:28,899 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:29,045 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:29,245 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:29,395 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:29,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:29,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2021-10-11 02:33:29,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398852542] [2021-10-11 02:33:29,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-10-11 02:33:29,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:29,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-11 02:33:29,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-10-11 02:33:29,398 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2021-10-11 02:33:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:29,843 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-10-11 02:33:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:33:29,845 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 25 [2021-10-11 02:33:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:29,846 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:33:29,846 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 02:33:29,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-10-11 02:33:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 02:33:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-10-11 02:33:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-10-11 02:33:29,851 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2021-10-11 02:33:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:29,851 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-10-11 02:33:29,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-10-11 02:33:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-10-11 02:33:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 02:33:29,852 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:29,852 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-10-11 02:33:30,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:30,066 INFO L429 AbstractCegarLoop]: === Iteration 14 === [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]=== [2021-10-11 02:33:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1548312133, now seen corresponding path program 6 times [2021-10-11 02:33:30,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:30,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132154449] [2021-10-11 02:33:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:30,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132154449] [2021-10-11 02:33:30,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152182985] [2021-10-11 02:33:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:30,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:33:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-11 02:33:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:30,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:30,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2028352382] [2021-10-11 02:33:30,638 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:30,638 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:30,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:30,639 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:30,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:30,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:30,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:30,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:30,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:31,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:31,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:31,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:31,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:31,786 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:31,988 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:32,204 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:32,598 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:32,749 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:32,921 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:33,155 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:33,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:33,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2021-10-11 02:33:33,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160398225] [2021-10-11 02:33:33,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-10-11 02:33:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-11 02:33:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-11 02:33:33,158 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 22 states. [2021-10-11 02:33:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:33,689 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-10-11 02:33:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 02:33:33,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2021-10-11 02:33:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:33,691 INFO L225 Difference]: With dead ends: 59 [2021-10-11 02:33:33,691 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:33:33,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-10-11 02:33:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:33:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-10-11 02:33:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-11 02:33:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-10-11 02:33:33,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2021-10-11 02:33:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:33,696 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-10-11 02:33:33,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-10-11 02:33:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-10-11 02:33:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-11 02:33:33,697 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:33,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2021-10-11 02:33:33,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-10-11 02:33:33,902 INFO L429 AbstractCegarLoop]: === Iteration 15 === [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]=== [2021-10-11 02:33:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:33,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1642423942, now seen corresponding path program 7 times [2021-10-11 02:33:33,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:33,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613174290] [2021-10-11 02:33:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:34,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613174290] [2021-10-11 02:33:34,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484345706] [2021-10-11 02:33:34,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-11 02:33:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:34,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:34,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541462593] [2021-10-11 02:33:34,419 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:34,419 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:34,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:34,420 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:34,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:34,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:34,798 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:34,944 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:35,288 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:35,457 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:35,603 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:35,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:35,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-10-11 02:33:35,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875604272] [2021-10-11 02:33:35,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-10-11 02:33:35,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-11 02:33:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-10-11 02:33:35,605 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 24 states. [2021-10-11 02:33:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:36,021 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-10-11 02:33:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 02:33:36,021 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2021-10-11 02:33:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:36,022 INFO L225 Difference]: With dead ends: 48 [2021-10-11 02:33:36,022 INFO L226 Difference]: Without dead ends: 48 [2021-10-11 02:33:36,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2021-10-11 02:33:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-11 02:33:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-10-11 02:33:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-11 02:33:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-10-11 02:33:36,027 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 32 [2021-10-11 02:33:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:36,028 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-10-11 02:33:36,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-10-11 02:33:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-10-11 02:33:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-11 02:33:36,029 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:36,029 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2021-10-11 02:33:36,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-10-11 02:33:36,234 INFO L429 AbstractCegarLoop]: === Iteration 16 === [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]=== [2021-10-11 02:33:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:36,235 INFO L82 PathProgramCache]: Analyzing trace with hash -147962690, now seen corresponding path program 8 times [2021-10-11 02:33:36,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:36,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218277160] [2021-10-11 02:33:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:36,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218277160] [2021-10-11 02:33:36,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823377117] [2021-10-11 02:33:36,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:36,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-11 02:33:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:36,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-11 02:33:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:36,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:37,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1289505126] [2021-10-11 02:33:37,057 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:37,057 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:37,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:37,058 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:37,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:37,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:37,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:37,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:37,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:37,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:37,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:37,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:37,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:38,033 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:38,198 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:38,439 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:38,796 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:38,950 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:39,145 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:39,410 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:39,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:39,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-10-11 02:33:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358135309] [2021-10-11 02:33:39,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-10-11 02:33:39,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:39,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-11 02:33:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2021-10-11 02:33:39,412 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 28 states. [2021-10-11 02:33:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:40,316 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-10-11 02:33:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-11 02:33:40,316 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2021-10-11 02:33:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:40,317 INFO L225 Difference]: With dead ends: 73 [2021-10-11 02:33:40,317 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 02:33:40,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=213, Invalid=2139, Unknown=0, NotChecked=0, Total=2352 [2021-10-11 02:33:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 02:33:40,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-10-11 02:33:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 02:33:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-10-11 02:33:40,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 37 [2021-10-11 02:33:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:40,321 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-10-11 02:33:40,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-10-11 02:33:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-10-11 02:33:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-11 02:33:40,330 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:40,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2021-10-11 02:33:40,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:40,542 INFO L429 AbstractCegarLoop]: === Iteration 17 === [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]=== [2021-10-11 02:33:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:40,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1328125331, now seen corresponding path program 9 times [2021-10-11 02:33:40,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:40,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009194743] [2021-10-11 02:33:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009194743] [2021-10-11 02:33:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218030275] [2021-10-11 02:33:40,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:40,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:33:40,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:40,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-11 02:33:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:41,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:41,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671465406] [2021-10-11 02:33:41,650 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:41,651 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:41,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:41,651 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:41,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:41,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:41,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:41,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:41,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:42,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:42,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:42,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:42,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:42,620 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:42,816 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:43,038 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:43,407 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:43,567 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:43,758 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:44,039 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:44,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:44,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2021-10-11 02:33:44,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671623059] [2021-10-11 02:33:44,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-10-11 02:33:44,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:44,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-11 02:33:44,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-10-11 02:33:44,042 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 41 states. [2021-10-11 02:33:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:44,644 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-10-11 02:33:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 02:33:44,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 39 [2021-10-11 02:33:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:44,645 INFO L225 Difference]: With dead ends: 56 [2021-10-11 02:33:44,645 INFO L226 Difference]: Without dead ends: 56 [2021-10-11 02:33:44,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-10-11 02:33:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-11 02:33:44,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-10-11 02:33:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-10-11 02:33:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-10-11 02:33:44,650 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2021-10-11 02:33:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:44,651 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-10-11 02:33:44,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-10-11 02:33:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-10-11 02:33:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-11 02:33:44,652 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:44,652 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2021-10-11 02:33:44,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:44,862 INFO L429 AbstractCegarLoop]: === Iteration 18 === [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]=== [2021-10-11 02:33:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:44,862 INFO L82 PathProgramCache]: Analyzing trace with hash -27363887, now seen corresponding path program 10 times [2021-10-11 02:33:44,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:44,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641013386] [2021-10-11 02:33:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 67 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:45,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641013386] [2021-10-11 02:33:45,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15948994] [2021-10-11 02:33:45,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-11 02:33:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:45,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:46,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451021928] [2021-10-11 02:33:46,271 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:46,271 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:46,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:46,272 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:46,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:46,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:46,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:46,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:46,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:46,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:46,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:46,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:46,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:47,212 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:47,385 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:47,608 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:47,996 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:48,170 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:48,364 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:48,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:48,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:48,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2021-10-11 02:33:48,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856326837] [2021-10-11 02:33:48,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-10-11 02:33:48,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:48,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-11 02:33:48,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1836, Unknown=0, NotChecked=0, Total=1980 [2021-10-11 02:33:48,715 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 39 states. [2021-10-11 02:33:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:50,246 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2021-10-11 02:33:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-11 02:33:50,247 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2021-10-11 02:33:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:50,248 INFO L225 Difference]: With dead ends: 87 [2021-10-11 02:33:50,248 INFO L226 Difference]: Without dead ends: 54 [2021-10-11 02:33:50,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 93 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=366, Invalid=3666, Unknown=0, NotChecked=0, Total=4032 [2021-10-11 02:33:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-11 02:33:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-10-11 02:33:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-10-11 02:33:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-11 02:33:50,253 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 44 [2021-10-11 02:33:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:50,253 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-11 02:33:50,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-10-11 02:33:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-11 02:33:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-11 02:33:50,254 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:50,254 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2021-10-11 02:33:50,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1258 [2021-10-11 02:33:50,482 INFO L429 AbstractCegarLoop]: === Iteration 19 === [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]=== [2021-10-11 02:33:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:50,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1838974116, now seen corresponding path program 11 times [2021-10-11 02:33:50,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:50,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636983603] [2021-10-11 02:33:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:50,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636983603] [2021-10-11 02:33:50,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820275563] [2021-10-11 02:33:50,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:50,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-11 02:33:50,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:50,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-11 02:33:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-11 02:33:51,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-11 02:33:51,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980683223] [2021-10-11 02:33:51,563 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:51,563 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:51,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:51,563 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:51,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:51,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:51,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:51,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:51,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:51,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:51,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:52,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:52,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:52,562 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:52,726 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-10-11 02:33:52,937 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-10-11 02:33:53,328 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-10-11 02:33:53,495 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-10-11 02:33:53,681 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-10-11 02:33:53,963 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:53,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:53,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 27 [2021-10-11 02:33:53,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387383294] [2021-10-11 02:33:53,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-10-11 02:33:53,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-11 02:33:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-10-11 02:33:53,966 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 29 states. [2021-10-11 02:33:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:55,340 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-10-11 02:33:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-11 02:33:55,341 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2021-10-11 02:33:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:55,341 INFO L225 Difference]: With dead ends: 64 [2021-10-11 02:33:55,341 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:33:55,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=783, Invalid=3249, Unknown=0, NotChecked=0, Total=4032 [2021-10-11 02:33:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:33:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:33:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:33:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:33:55,342 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-10-11 02:33:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:55,343 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:33:55,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-10-11 02:33:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:33:55,343 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:33:55,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1403,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:55,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:55 BoogieIcfgContainer [2021-10-11 02:33:55,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:55,547 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:55,547 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:55,547 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:55,548 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:07" (3/4) ... [2021-10-11 02:33:55,550 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:33:55,558 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-11 02:33:55,559 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-11 02:33:55,559 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:33:55,600 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_100df7f2-8dce-4222-9f51-53397d7f46ce/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:55,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:55,601 INFO L168 Benchmark]: Toolchain (without parser) took 48953.57 ms. Allocated memory was 100.7 MB in the beginning and 446.7 MB in the end (delta: 346.0 MB). Free memory was 67.1 MB in the beginning and 356.7 MB in the end (delta: -289.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:55,601 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 33.7 MB in the beginning and 33.7 MB in the end (delta: 41.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:55,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 620.48 ms. Allocated memory is still 100.7 MB. Free memory was 66.9 MB in the beginning and 66.4 MB in the end (delta: 504.1 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:55,602 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.75 ms. Allocated memory is still 100.7 MB. Free memory was 65.9 MB in the beginning and 64.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:55,602 INFO L168 Benchmark]: Boogie Preprocessor took 56.90 ms. Allocated memory is still 100.7 MB. Free memory was 64.1 MB in the beginning and 62.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:55,602 INFO L168 Benchmark]: RCFGBuilder took 512.44 ms. Allocated memory is still 100.7 MB. Free memory was 62.7 MB in the beginning and 38.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:55,603 INFO L168 Benchmark]: TraceAbstraction took 47638.88 ms. Allocated memory was 100.7 MB in the beginning and 446.7 MB in the end (delta: 346.0 MB). Free memory was 37.5 MB in the beginning and 359.9 MB in the end (delta: -322.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:55,603 INFO L168 Benchmark]: Witness Printer took 53.26 ms. Allocated memory is still 446.7 MB. Free memory was 359.9 MB in the beginning and 356.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:55,605 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 33.7 MB in the beginning and 33.7 MB in the end (delta: 41.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 620.48 ms. Allocated memory is still 100.7 MB. Free memory was 66.9 MB in the beginning and 66.4 MB in the end (delta: 504.1 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.75 ms. Allocated memory is still 100.7 MB. Free memory was 65.9 MB in the beginning and 64.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.90 ms. Allocated memory is still 100.7 MB. Free memory was 64.1 MB in the beginning and 62.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 512.44 ms. Allocated memory is still 100.7 MB. Free memory was 62.7 MB in the beginning and 38.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47638.88 ms. Allocated memory was 100.7 MB in the beginning and 446.7 MB in the end (delta: 346.0 MB). Free memory was 37.5 MB in the beginning and 359.9 MB in the end (delta: -322.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. * Witness Printer took 53.26 ms. Allocated memory is still 446.7 MB. Free memory was 359.9 MB in the beginning and 356.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 47.5s, OverallIterations: 19, TraceHistogramMax: 6, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 229 SDtfs, 2453 SDslu, 1402 SDs, 0 SdLazy, 3676 SolverSat, 737 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1236 GetRequests, 671 SyntacticMatches, 62 SemanticMatches, 503 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 24.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=18, 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, 19 MinimizatonAttempts, 76 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 685 NumberOfCodeBlocks, 685 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 968 ConstructedInterpolants, 92 QuantifiedInterpolants, 350055 SizeOfPredicates, 140 NumberOfNonLiveVariables, 1775 ConjunctsInSsa, 397 ConjunctsInUnsatCore, 43 InterpolantComputations, 7 PerfectInterpolantSequences, 542/1618 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...