./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 03:21:36,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 03:21:36,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 03:21:36,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 03:21:36,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 03:21:36,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 03:21:36,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 03:21:36,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 03:21:36,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 03:21:36,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 03:21:36,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 03:21:36,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 03:21:36,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 03:21:36,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 03:21:36,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 03:21:36,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 03:21:36,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 03:21:36,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 03:21:36,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 03:21:36,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 03:21:36,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 03:21:36,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 03:21:36,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 03:21:36,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 03:21:36,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 03:21:36,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 03:21:36,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 03:21:36,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 03:21:36,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 03:21:36,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 03:21:36,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 03:21:36,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 03:21:36,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 03:21:36,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 03:21:36,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 03:21:36,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 03:21:36,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 03:21:36,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 03:21:36,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 03:21:36,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 03:21:36,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 03:21:36,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 03:21:36,408 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 03:21:36,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 03:21:36,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 03:21:36,410 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 03:21:36,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 03:21:36,411 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 03:21:36,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 03:21:36,411 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 03:21:36,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 03:21:36,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 03:21:36,412 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 03:21:36,412 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 03:21:36,413 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 03:21:36,413 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 03:21:36,413 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 03:21:36,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 03:21:36,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 03:21:36,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 03:21:36,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 03:21:36,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 03:21:36,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 03:21:36,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 03:21:36,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 03:21:36,417 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 03:21:36,417 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 03:21:36,417 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 03:21:36,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 03:21:36,418 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 03:21:36,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 03:21:36,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 03:21:36,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 03:21:36,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 03:21:36,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 03:21:36,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:21:36,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 03:21:36,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 03:21:36,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 03:21:36,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 03:21:36,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 03:21:36,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 03:21:36,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2020-11-30 03:21:36,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 03:21:36,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 03:21:36,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 03:21:36,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 03:21:36,818 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 03:21:36,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-30 03:21:36,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/data/df01f500d/70470543319440a7a70bfb5d9a8bdbd1/FLAGd631f2167 [2020-11-30 03:21:37,593 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 03:21:37,594 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-30 03:21:37,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/data/df01f500d/70470543319440a7a70bfb5d9a8bdbd1/FLAGd631f2167 [2020-11-30 03:21:37,853 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/data/df01f500d/70470543319440a7a70bfb5d9a8bdbd1 [2020-11-30 03:21:37,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 03:21:37,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 03:21:37,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 03:21:37,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 03:21:37,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 03:21:37,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:21:37" (1/1) ... [2020-11-30 03:21:37,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa2b591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:37, skipping insertion in model container [2020-11-30 03:21:37,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:21:37" (1/1) ... [2020-11-30 03:21:37,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 03:21:37,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 03:21:38,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:21:38,355 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 03:21:38,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:21:38,507 INFO L208 MainTranslator]: Completed translation [2020-11-30 03:21:38,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38 WrapperNode [2020-11-30 03:21:38,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 03:21:38,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 03:21:38,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 03:21:38,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 03:21:38,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 03:21:38,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 03:21:38,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 03:21:38,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 03:21:38,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... [2020-11-30 03:21:38,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 03:21:38,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 03:21:38,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 03:21:38,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 03:21:38,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:21:38,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 03:21:38,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 03:21:38,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 03:21:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 03:21:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 03:21:38,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 03:21:39,431 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 03:21:39,432 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 03:21:39,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:21:39 BoogieIcfgContainer [2020-11-30 03:21:39,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 03:21:39,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 03:21:39,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 03:21:39,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 03:21:39,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 03:21:37" (1/3) ... [2020-11-30 03:21:39,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70614d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:21:39, skipping insertion in model container [2020-11-30 03:21:39,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:21:38" (2/3) ... [2020-11-30 03:21:39,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70614d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:21:39, skipping insertion in model container [2020-11-30 03:21:39,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:21:39" (3/3) ... [2020-11-30 03:21:39,446 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2020-11-30 03:21:39,457 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 03:21:39,463 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-30 03:21:39,483 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-30 03:21:39,530 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 03:21:39,531 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 03:21:39,531 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 03:21:39,532 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 03:21:39,532 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 03:21:39,532 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 03:21:39,533 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 03:21:39,533 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 03:21:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-30 03:21:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 03:21:39,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:39,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 03:21:39,565 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:39,577 INFO L82 PathProgramCache]: Analyzing trace with hash 108370, now seen corresponding path program 1 times [2020-11-30 03:21:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:39,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609003305] [2020-11-30 03:21:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609003305] [2020-11-30 03:21:39,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:39,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 03:21:39,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306301463] [2020-11-30 03:21:39,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 03:21:39,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:39,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 03:21:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:21:39,861 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-11-30 03:21:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:39,937 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-11-30 03:21:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 03:21:39,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 03:21:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:39,947 INFO L225 Difference]: With dead ends: 16 [2020-11-30 03:21:39,948 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 03:21:39,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:21:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 03:21:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 03:21:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 03:21:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-30 03:21:39,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2020-11-30 03:21:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:39,987 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-30 03:21:39,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 03:21:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-30 03:21:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 03:21:39,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:39,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 03:21:39,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 03:21:39,989 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash 108371, now seen corresponding path program 1 times [2020-11-30 03:21:39,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:39,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806804310] [2020-11-30 03:21:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:40,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806804310] [2020-11-30 03:21:40,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:40,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 03:21:40,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309627698] [2020-11-30 03:21:40,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:21:40,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:21:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:21:40,131 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-30 03:21:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:40,262 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-30 03:21:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:21:40,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-30 03:21:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:40,264 INFO L225 Difference]: With dead ends: 28 [2020-11-30 03:21:40,264 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 03:21:40,265 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 [2020-11-30 03:21:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 03:21:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2020-11-30 03:21:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 03:21:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-30 03:21:40,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2020-11-30 03:21:40,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:40,270 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-30 03:21:40,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:21:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-30 03:21:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 03:21:40,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:40,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 03:21:40,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 03:21:40,271 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:40,272 INFO L82 PathProgramCache]: Analyzing trace with hash 110085, now seen corresponding path program 1 times [2020-11-30 03:21:40,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:40,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883064029] [2020-11-30 03:21:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883064029] [2020-11-30 03:21:40,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:40,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 03:21:40,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538105648] [2020-11-30 03:21:40,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 03:21:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 03:21:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:21:40,349 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-11-30 03:21:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:40,376 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-11-30 03:21:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 03:21:40,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 03:21:40,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:40,379 INFO L225 Difference]: With dead ends: 16 [2020-11-30 03:21:40,379 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 03:21:40,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:21:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 03:21:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-30 03:21:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 03:21:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-11-30 03:21:40,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 3 [2020-11-30 03:21:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:40,384 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-11-30 03:21:40,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 03:21:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-11-30 03:21:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 03:21:40,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:40,385 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-30 03:21:40,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 03:21:40,385 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash 104192359, now seen corresponding path program 1 times [2020-11-30 03:21:40,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:40,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701622920] [2020-11-30 03:21:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701622920] [2020-11-30 03:21:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551093300] [2020-11-30 03:21:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:21:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 03:21:40,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:21:40,680 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 03:21:40,681 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 03:21:40,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 03:21:40,725 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 03:21:40,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-30 03:21:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:40,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:21:40,935 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 03:21:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:40,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344023612] [2020-11-30 03:21:41,023 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-30 03:21:41,024 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:21:41,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 03:21:41,036 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 03:21:41,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 03:21:41,292 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-30 03:21:41,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:21:41,643 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 03:21:41,808 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-30 03:21:42,081 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-11-30 03:21:42,084 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:21:42,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:21:42,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-11-30 03:21:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102616504] [2020-11-30 03:21:42,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 03:21:42,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 03:21:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-11-30 03:21:42,087 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 9 states. [2020-11-30 03:21:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:42,312 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-11-30 03:21:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 03:21:42,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-11-30 03:21:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:42,314 INFO L225 Difference]: With dead ends: 36 [2020-11-30 03:21:42,315 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 03:21:42,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-30 03:21:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 03:21:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 13. [2020-11-30 03:21:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 03:21:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-30 03:21:42,319 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2020-11-30 03:21:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:42,320 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-30 03:21:42,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 03:21:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-30 03:21:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 03:21:42,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:42,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 03:21:42,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-11-30 03:21:42,547 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:42,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1014372349, now seen corresponding path program 1 times [2020-11-30 03:21:42,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:42,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64518813] [2020-11-30 03:21:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:42,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64518813] [2020-11-30 03:21:42,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:42,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 03:21:42,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956162007] [2020-11-30 03:21:42,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 03:21:42,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:42,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 03:21:42,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:21:42,598 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-11-30 03:21:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:42,622 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-11-30 03:21:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 03:21:42,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-30 03:21:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:42,623 INFO L225 Difference]: With dead ends: 12 [2020-11-30 03:21:42,624 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 03:21:42,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:21:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 03:21:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 03:21:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 03:21:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-30 03:21:42,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2020-11-30 03:21:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:42,627 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-30 03:21:42,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 03:21:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-30 03:21:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 03:21:42,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:42,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 03:21:42,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-30 03:21:42,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1014372348, now seen corresponding path program 1 times [2020-11-30 03:21:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:42,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733825422] [2020-11-30 03:21:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:42,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733825422] [2020-11-30 03:21:42,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:42,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 03:21:42,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133623101] [2020-11-30 03:21:42,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:21:42,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:21:42,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:21:42,723 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-11-30 03:21:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:42,782 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-30 03:21:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:21:42,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 03:21:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:42,784 INFO L225 Difference]: With dead ends: 19 [2020-11-30 03:21:42,784 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 03:21:42,785 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 [2020-11-30 03:21:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 03:21:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-11-30 03:21:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 03:21:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-30 03:21:42,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 6 [2020-11-30 03:21:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:42,788 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-30 03:21:42,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:21:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-11-30 03:21:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 03:21:42,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:42,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:21:42,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-30 03:21:42,790 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:42,790 INFO L82 PathProgramCache]: Analyzing trace with hash 145937565, now seen corresponding path program 1 times [2020-11-30 03:21:42,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890917123] [2020-11-30 03:21:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:42,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890917123] [2020-11-30 03:21:42,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:42,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 03:21:42,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412613976] [2020-11-30 03:21:42,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 03:21:42,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 03:21:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:21:42,956 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2020-11-30 03:21:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:43,044 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-11-30 03:21:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 03:21:43,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-30 03:21:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:43,045 INFO L225 Difference]: With dead ends: 19 [2020-11-30 03:21:43,045 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 03:21:43,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 03:21:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 03:21:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-11-30 03:21:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 03:21:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-30 03:21:43,052 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2020-11-30 03:21:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:43,052 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-30 03:21:43,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 03:21:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-30 03:21:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 03:21:43,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:43,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:21:43,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-30 03:21:43,054 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash 224103215, now seen corresponding path program 1 times [2020-11-30 03:21:43,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:43,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741194670] [2020-11-30 03:21:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:43,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741194670] [2020-11-30 03:21:43,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:43,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 03:21:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009296091] [2020-11-30 03:21:43,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:21:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:21:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:21:43,155 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-30 03:21:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:43,175 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-30 03:21:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:21:43,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 03:21:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:43,176 INFO L225 Difference]: With dead ends: 14 [2020-11-30 03:21:43,176 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 03:21:43,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:21:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 03:21:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 03:21:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 03:21:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-30 03:21:43,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-11-30 03:21:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:43,180 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-30 03:21:43,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:21:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-30 03:21:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 03:21:43,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:43,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 03:21:43,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-30 03:21:43,181 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:43,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1642260829, now seen corresponding path program 1 times [2020-11-30 03:21:43,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:43,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084257906] [2020-11-30 03:21:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:43,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084257906] [2020-11-30 03:21:43,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:21:43,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 03:21:43,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679456103] [2020-11-30 03:21:43,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 03:21:43,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 03:21:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 03:21:43,308 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-11-30 03:21:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:43,433 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-30 03:21:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 03:21:43,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 03:21:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:43,434 INFO L225 Difference]: With dead ends: 20 [2020-11-30 03:21:43,434 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 03:21:43,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-30 03:21:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 03:21:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-30 03:21:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 03:21:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-30 03:21:43,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-11-30 03:21:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:43,437 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-30 03:21:43,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 03:21:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-30 03:21:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 03:21:43,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:43,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:21:43,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-30 03:21:43,439 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash 230958607, now seen corresponding path program 1 times [2020-11-30 03:21:43,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:43,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050695097] [2020-11-30 03:21:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:43,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050695097] [2020-11-30 03:21:43,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179232522] [2020-11-30 03:21:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:21:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 03:21:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:21:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:43,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:21:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:43,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579304247] [2020-11-30 03:21:43,925 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 03:21:43,925 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:21:43,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 03:21:43,925 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 03:21:43,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 03:21:44,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:21:44,686 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 03:21:44,963 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-30 03:21:45,092 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-30 03:21:45,238 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-11-30 03:21:45,390 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-11-30 03:21:46,200 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-11-30 03:21:47,177 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-11-30 03:21:47,857 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-11-30 03:21:48,027 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-30 03:21:48,029 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:21:48,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:21:48,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2020-11-30 03:21:48,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293046321] [2020-11-30 03:21:48,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 03:21:48,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 03:21:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-11-30 03:21:48,031 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 13 states. [2020-11-30 03:21:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:48,268 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-30 03:21:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 03:21:48,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-30 03:21:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:48,270 INFO L225 Difference]: With dead ends: 19 [2020-11-30 03:21:48,270 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 03:21:48,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-11-30 03:21:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 03:21:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-11-30 03:21:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 03:21:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-30 03:21:48,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-11-30 03:21:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:48,273 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-30 03:21:48,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 03:21:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-30 03:21:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 03:21:48,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:21:48,274 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 03:21:48,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-30 03:21:48,484 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 03:21:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:21:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1516021970, now seen corresponding path program 2 times [2020-11-30 03:21:48,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:21:48,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347339846] [2020-11-30 03:21:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:21:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:21:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:21:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347339846] [2020-11-30 03:21:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435536057] [2020-11-30 03:21:48,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:21:48,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 03:21:48,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 03:21:48,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 03:21:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:21:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 03:21:49,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:21:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 03:21:49,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675202705] [2020-11-30 03:21:49,686 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 03:21:49,686 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:21:49,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 03:21:49,687 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 03:21:49,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 03:21:49,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:21:50,382 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 03:21:50,683 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-30 03:21:50,838 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-30 03:21:51,006 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-11-30 03:21:51,891 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-11-30 03:21:52,678 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-11-30 03:21:53,338 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-11-30 03:21:53,507 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-30 03:21:53,509 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:21:53,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:21:53,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2020-11-30 03:21:53,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676846650] [2020-11-30 03:21:53,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 03:21:53,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:21:53,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 03:21:53,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-11-30 03:21:53,511 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2020-11-30 03:21:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:21:54,256 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-30 03:21:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 03:21:54,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-11-30 03:21:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:21:54,257 INFO L225 Difference]: With dead ends: 28 [2020-11-30 03:21:54,258 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 03:21:54,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 03:21:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 03:21:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 03:21:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 03:21:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 03:21:54,262 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-30 03:21:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:21:54,263 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 03:21:54,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 03:21:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 03:21:54,263 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 03:21:54,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-30 03:21:54,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 03:21:54 BoogieIcfgContainer [2020-11-30 03:21:54,467 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 03:21:54,468 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 03:21:54,468 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 03:21:54,468 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 03:21:54,469 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:21:39" (3/4) ... [2020-11-30 03:21:54,472 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 03:21:54,480 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-30 03:21:54,481 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 03:21:54,481 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 03:21:54,539 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_94836ae9-2f81-4658-be28-afe3c3c8371b/bin/utaipan/witness.graphml [2020-11-30 03:21:54,540 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 03:21:54,541 INFO L168 Benchmark]: Toolchain (without parser) took 16683.38 ms. Allocated memory was 92.3 MB in the beginning and 174.1 MB in the end (delta: 81.8 MB). Free memory was 58.0 MB in the beginning and 77.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 62.6 MB. Max. memory is 16.1 GB. [2020-11-30 03:21:54,542 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 73.4 MB. Free memory was 31.3 MB in the beginning and 31.3 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:21:54,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.20 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 57.9 MB in the end (delta: -17.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 03:21:54,543 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.43 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 56.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:21:54,543 INFO L168 Benchmark]: Boogie Preprocessor took 69.20 ms. Allocated memory is still 92.3 MB. Free memory was 56.1 MB in the beginning and 54.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:21:54,544 INFO L168 Benchmark]: RCFGBuilder took 771.70 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 54.8 MB in the beginning and 94.3 MB in the end (delta: -39.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2020-11-30 03:21:54,544 INFO L168 Benchmark]: TraceAbstraction took 15030.60 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 93.3 MB in the beginning and 80.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.1 GB. [2020-11-30 03:21:54,545 INFO L168 Benchmark]: Witness Printer took 72.22 ms. Allocated memory is still 174.1 MB. Free memory was 80.0 MB in the beginning and 77.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:21:54,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 73.4 MB. Free memory was 31.3 MB in the beginning and 31.3 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 646.20 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 57.9 MB in the end (delta: -17.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.43 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 56.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.20 ms. Allocated memory is still 92.3 MB. Free memory was 56.1 MB in the beginning and 54.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 771.70 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 54.8 MB in the beginning and 94.3 MB in the end (delta: -39.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15030.60 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 93.3 MB in the beginning and 80.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.1 GB. * Witness Printer took 72.22 ms. Allocated memory is still 174.1 MB. Free memory was 80.0 MB in the beginning and 77.2 MB in the end (delta: 2.8 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: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 254 SDslu, 158 SDs, 0 SdLazy, 296 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 45 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 130 ConstructedInterpolants, 14 QuantifiedInterpolants, 14660 SizeOfPredicates, 26 NumberOfNonLiveVariables, 216 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 18/54 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...