./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_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/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 [2020-11-28 07:27:59,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:27:59,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:27:59,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:27:59,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:27:59,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:27:59,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:27:59,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:27:59,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:27:59,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:27:59,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:27:59,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:27:59,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:27:59,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:27:59,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:27:59,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:27:59,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:27:59,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:27:59,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:27:59,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:27:59,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:27:59,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:27:59,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:27:59,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:27:59,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:27:59,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:27:59,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:27:59,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:27:59,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:27:59,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:27:59,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:27:59,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:27:59,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:27:59,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:27:59,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:27:59,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:27:59,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:27:59,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:27:59,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:27:59,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:27:59,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:27:59,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:27:59,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:27:59,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:27:59,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:27:59,454 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:27:59,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:27:59,454 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:27:59,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:27:59,455 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:27:59,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:27:59,455 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:27:59,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:27:59,456 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:27:59,457 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:27:59,457 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:27:59,457 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:27:59,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:27:59,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:27:59,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:27:59,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:27:59,459 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:27:59,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:27:59,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:27:59,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:27:59,460 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:27:59,460 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:27:59,460 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:27:59,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:27:59,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:27:59,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:27:59,463 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:27:59,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:27:59,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:27:59,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:27:59,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:27:59,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:27:59,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:27:59,464 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:27:59,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:27:59,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:27:59,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:27:59,471 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_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2020-11-28 07:27:59,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:27:59,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:27:59,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:27:59,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:27:59,755 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:27:59,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-28 07:27:59,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/data/08a780b82/9975d9b7ad3a4f1d8a26aeba085b009e/FLAG68bab04e8 [2020-11-28 07:28:00,399 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:28:00,400 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-11-28 07:28:00,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/data/08a780b82/9975d9b7ad3a4f1d8a26aeba085b009e/FLAG68bab04e8 [2020-11-28 07:28:00,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/data/08a780b82/9975d9b7ad3a4f1d8a26aeba085b009e [2020-11-28 07:28:00,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:28:00,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:28:00,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:28:00,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:28:00,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:28:00,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:28:00" (1/1) ... [2020-11-28 07:28:00,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fea450a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:00, skipping insertion in model container [2020-11-28 07:28:00,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:28:00" (1/1) ... [2020-11-28 07:28:00,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:28:00,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:28:01,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:28:01,132 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:28:01,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:28:01,249 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:28:01,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01 WrapperNode [2020-11-28 07:28:01,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:28:01,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:28:01,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:28:01,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:28:01,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:28:01,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:28:01,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:28:01,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:28:01,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... [2020-11-28 07:28:01,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:28:01,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:28:01,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:28:01,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:28:01,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:28:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:28:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:28:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:28:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:28:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:28:01,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:28:01,970 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:28:01,971 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-28 07:28:01,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:28:01 BoogieIcfgContainer [2020-11-28 07:28:01,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:28:01,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:28:01,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:28:01,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:28:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:28:00" (1/3) ... [2020-11-28 07:28:01,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d94fc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:28:01, skipping insertion in model container [2020-11-28 07:28:01,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:28:01" (2/3) ... [2020-11-28 07:28:01,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d94fc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:28:01, skipping insertion in model container [2020-11-28 07:28:01,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:28:01" (3/3) ... [2020-11-28 07:28:01,991 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2020-11-28 07:28:02,000 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:28:02,004 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 07:28:02,015 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 07:28:02,034 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:28:02,034 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:28:02,034 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:28:02,034 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:28:02,034 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:28:02,034 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:28:02,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:28:02,035 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:28:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-28 07:28:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:28:02,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:02,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:28:02,053 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]=== [2020-11-28 07:28:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:02,058 INFO L82 PathProgramCache]: Analyzing trace with hash 108370, now seen corresponding path program 1 times [2020-11-28 07:28:02,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:02,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633877155] [2020-11-28 07:28:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:02,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633877155] [2020-11-28 07:28:02,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:02,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:28:02,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35943010] [2020-11-28 07:28:02,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:28:02,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:28:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:28:02,222 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-11-28 07:28:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:02,271 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-11-28 07:28:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:28:02,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:28:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:02,279 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:28:02,279 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:28:02,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:28:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:28:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 07:28:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:28:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-28 07:28:02,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2020-11-28 07:28:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:02,327 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-28 07:28:02,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:28:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-28 07:28:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:28:02,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:02,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:28:02,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:28:02,329 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]=== [2020-11-28 07:28:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 108371, now seen corresponding path program 1 times [2020-11-28 07:28:02,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:02,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749688442] [2020-11-28 07:28:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:02,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749688442] [2020-11-28 07:28:02,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:02,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:28:02,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017843281] [2020-11-28 07:28:02,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:28:02,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:02,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:28:02,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:28:02,445 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-28 07:28:02,588 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-28 07:28:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:02,652 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-28 07:28:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:28:02,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:28:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:02,653 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:28:02,654 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 07:28:02,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:28:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 07:28:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2020-11-28 07:28:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 07:28:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-28 07:28:02,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2020-11-28 07:28:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:02,659 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-28 07:28:02,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:28:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-28 07:28:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:28:02,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:02,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:28:02,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:28:02,660 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]=== [2020-11-28 07:28:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:02,661 INFO L82 PathProgramCache]: Analyzing trace with hash 110085, now seen corresponding path program 1 times [2020-11-28 07:28:02,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:02,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534536227] [2020-11-28 07:28:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:02,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534536227] [2020-11-28 07:28:02,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:02,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:28:02,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085601161] [2020-11-28 07:28:02,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:28:02,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:02,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:28:02,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:28:02,710 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-11-28 07:28:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:02,733 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-11-28 07:28:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:28:02,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:28:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:02,734 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:28:02,734 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 07:28:02,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:28:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 07:28:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 07:28:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 07:28:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-11-28 07:28:02,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 3 [2020-11-28 07:28:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:02,738 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-11-28 07:28:02,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:28:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-11-28 07:28:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:28:02,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:02,739 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-28 07:28:02,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:28:02,740 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]=== [2020-11-28 07:28:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash 104192359, now seen corresponding path program 1 times [2020-11-28 07:28:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:02,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952393297] [2020-11-28 07:28:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:02,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952393297] [2020-11-28 07:28:02,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995793445] [2020-11-28 07:28:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:28:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:02,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:28:02,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:28:02,991 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 07:28:02,991 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:28:03,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:28:03,021 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:28:03,021 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 07:28:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:03,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:28:03,152 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-28 07:28:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:03,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198646223] [2020-11-28 07:28:03,237 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-28 07:28:03,237 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:28:03,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:28:03,251 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:28:03,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:28:03,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:28:03,851 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:28:04,159 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:28:04,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:28:04,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-11-28 07:28:04,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003327321] [2020-11-28 07:28:04,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:28:04,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:04,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:28:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:28:04,162 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 9 states. [2020-11-28 07:28:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:04,328 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-11-28 07:28:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:28:04,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-11-28 07:28:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:04,332 INFO L225 Difference]: With dead ends: 36 [2020-11-28 07:28:04,332 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 07:28:04,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:28:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 07:28:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 13. [2020-11-28 07:28:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:28:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-28 07:28:04,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2020-11-28 07:28:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:04,336 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-28 07:28:04,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:28:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-28 07:28:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:28:04,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:04,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:28:04,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-11-28 07:28:04,561 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]=== [2020-11-28 07:28:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1014372349, now seen corresponding path program 1 times [2020-11-28 07:28:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:04,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775391142] [2020-11-28 07:28:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:04,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775391142] [2020-11-28 07:28:04,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:04,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:28:04,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63199591] [2020-11-28 07:28:04,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:28:04,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:04,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:28:04,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:28:04,596 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-11-28 07:28:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:04,613 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-11-28 07:28:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:28:04,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 07:28:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:04,615 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:28:04,615 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:28:04,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:28:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:28:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:28:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:28:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-28 07:28:04,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2020-11-28 07:28:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:04,617 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-28 07:28:04,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:28:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-28 07:28:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:28:04,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:04,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:28:04,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-28 07:28:04,618 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]=== [2020-11-28 07:28:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1014372348, now seen corresponding path program 1 times [2020-11-28 07:28:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:04,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334398261] [2020-11-28 07:28:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:04,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334398261] [2020-11-28 07:28:04,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:04,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:28:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141797425] [2020-11-28 07:28:04,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:28:04,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:28:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:28:04,690 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-11-28 07:28:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:04,737 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-28 07:28:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:28:04,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:28:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:04,738 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:28:04,738 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 07:28:04,739 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 [2020-11-28 07:28:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 07:28:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-11-28 07:28:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:28:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-28 07:28:04,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 6 [2020-11-28 07:28:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:04,741 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-28 07:28:04,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:28:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-11-28 07:28:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:28:04,742 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:04,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:28:04,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-28 07:28:04,742 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]=== [2020-11-28 07:28:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:04,743 INFO L82 PathProgramCache]: Analyzing trace with hash 145937565, now seen corresponding path program 1 times [2020-11-28 07:28:04,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:04,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852440487] [2020-11-28 07:28:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:04,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852440487] [2020-11-28 07:28:04,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:04,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:28:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511623212] [2020-11-28 07:28:04,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:28:04,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:28:04,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:28:04,858 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2020-11-28 07:28:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:04,936 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-11-28 07:28:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:28:04,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 07:28:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:04,936 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:28:04,937 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 07:28:04,937 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 [2020-11-28 07:28:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 07:28:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-11-28 07:28:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:28:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-28 07:28:04,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2020-11-28 07:28:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:04,939 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-28 07:28:04,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:28:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-28 07:28:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:28:04,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:04,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:28:04,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-28 07:28:04,944 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]=== [2020-11-28 07:28:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash 224103215, now seen corresponding path program 1 times [2020-11-28 07:28:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:04,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099252170] [2020-11-28 07:28:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:05,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099252170] [2020-11-28 07:28:05,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:05,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:28:05,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216119295] [2020-11-28 07:28:05,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:28:05,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:05,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:28:05,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:28:05,058 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-28 07:28:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:05,076 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-28 07:28:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:28:05,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:28:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:05,078 INFO L225 Difference]: With dead ends: 14 [2020-11-28 07:28:05,078 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:28:05,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:28:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:28:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:28:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:28:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-28 07:28:05,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-11-28 07:28:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:05,080 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-28 07:28:05,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:28:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-28 07:28:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:28:05,081 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:05,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:28:05,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-28 07:28:05,081 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]=== [2020-11-28 07:28:05,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:05,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1642260829, now seen corresponding path program 1 times [2020-11-28 07:28:05,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:05,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672254963] [2020-11-28 07:28:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:05,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672254963] [2020-11-28 07:28:05,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:28:05,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:28:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724221329] [2020-11-28 07:28:05,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:28:05,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:28:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:28:05,199 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-11-28 07:28:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:05,301 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-28 07:28:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:28:05,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 07:28:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:05,302 INFO L225 Difference]: With dead ends: 20 [2020-11-28 07:28:05,302 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:28:05,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:28:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:28:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-28 07:28:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:28:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-28 07:28:05,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-11-28 07:28:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:05,304 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-28 07:28:05,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:28:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-28 07:28:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:28:05,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:05,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:28:05,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-28 07:28:05,305 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]=== [2020-11-28 07:28:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:05,306 INFO L82 PathProgramCache]: Analyzing trace with hash 230958607, now seen corresponding path program 1 times [2020-11-28 07:28:05,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:05,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134437616] [2020-11-28 07:28:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:05,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134437616] [2020-11-28 07:28:05,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873452564] [2020-11-28 07:28:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:28:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 07:28:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:28:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:05,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:28:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:05,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775906319] [2020-11-28 07:28:05,732 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:28:05,732 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:28:05,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:28:05,736 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:28:05,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:28:05,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:28:06,360 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:28:06,586 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-28 07:28:06,825 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-11-28 07:28:07,668 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-11-28 07:28:08,382 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-11-28 07:28:08,988 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-11-28 07:28:09,186 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-28 07:28:09,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:28:09,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:28:09,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2020-11-28 07:28:09,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348254253] [2020-11-28 07:28:09,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:28:09,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:28:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-11-28 07:28:09,189 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 13 states. [2020-11-28 07:28:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:09,374 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-28 07:28:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:28:09,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-28 07:28:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:09,375 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:28:09,375 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 07:28:09,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-11-28 07:28:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 07:28:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-11-28 07:28:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 07:28:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-28 07:28:09,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-11-28 07:28:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:09,378 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-28 07:28:09,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:28:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-28 07:28:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:28:09,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:28:09,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:28:09,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-28 07:28:09,580 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]=== [2020-11-28 07:28:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:28:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1516021970, now seen corresponding path program 2 times [2020-11-28 07:28:09,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:28:09,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102225437] [2020-11-28 07:28:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:28:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:28:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:28:09,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102225437] [2020-11-28 07:28:09,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206817082] [2020-11-28 07:28:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:28:09,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 07:28:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:28:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 07:28:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:28:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 07:28:10,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:28:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 07:28:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679168467] [2020-11-28 07:28:10,668 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:28:10,668 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:28:10,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:28:10,669 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:28:10,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:28:10,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:28:11,241 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:28:11,469 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-28 07:28:12,425 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-11-28 07:28:13,217 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-11-28 07:28:13,885 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-11-28 07:28:14,050 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-28 07:28:14,052 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:28:14,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:28:14,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2020-11-28 07:28:14,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823132483] [2020-11-28 07:28:14,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-28 07:28:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:28:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 07:28:14,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-11-28 07:28:14,054 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2020-11-28 07:28:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:28:14,596 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-28 07:28:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 07:28:14,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-11-28 07:28:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:28:14,597 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:28:14,597 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:28:14,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2020-11-28 07:28:14,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:28:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:28:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:28:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:28:14,598 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-28 07:28:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:28:14,598 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:28:14,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-28 07:28:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:28:14,599 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:28:14,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-28 07:28:14,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:28:14 BoogieIcfgContainer [2020-11-28 07:28:14,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:28:14,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:28:14,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:28:14,804 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:28:14,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:28:01" (3/4) ... [2020-11-28 07:28:14,807 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:28:14,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-28 07:28:14,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-28 07:28:14,820 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:28:14,866 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4b2e2bde-c4a0-4c18-8f06-16f4328a5233/bin/utaipan/witness.graphml [2020-11-28 07:28:14,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:28:14,868 INFO L168 Benchmark]: Toolchain (without parser) took 14162.48 ms. Allocated memory was 92.3 MB in the beginning and 243.3 MB in the end (delta: 151.0 MB). Free memory was 56.9 MB in the beginning and 91.8 MB in the end (delta: -34.9 MB). Peak memory consumption was 115.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:28:14,868 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 30.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:28:14,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 531.47 ms. Allocated memory is still 92.3 MB. Free memory was 56.7 MB in the beginning and 58.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:28:14,871 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.00 ms. Allocated memory is still 92.3 MB. Free memory was 58.1 MB in the beginning and 56.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:28:14,871 INFO L168 Benchmark]: Boogie Preprocessor took 23.64 ms. Allocated memory is still 92.3 MB. Free memory was 56.3 MB in the beginning and 55.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:28:14,872 INFO L168 Benchmark]: RCFGBuilder took 657.19 ms. Allocated memory is still 92.3 MB. Free memory was 55.1 MB in the beginning and 67.6 MB in the end (delta: -12.5 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:28:14,872 INFO L168 Benchmark]: TraceAbstraction took 12828.47 ms. Allocated memory was 92.3 MB in the beginning and 243.3 MB in the end (delta: 151.0 MB). Free memory was 67.6 MB in the beginning and 95.0 MB in the end (delta: -27.4 MB). Peak memory consumption was 122.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:28:14,873 INFO L168 Benchmark]: Witness Printer took 62.96 ms. Allocated memory is still 243.3 MB. Free memory was 95.0 MB in the beginning and 91.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:28:14,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 30.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 531.47 ms. Allocated memory is still 92.3 MB. Free memory was 56.7 MB in the beginning and 58.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.00 ms. Allocated memory is still 92.3 MB. Free memory was 58.1 MB in the beginning and 56.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.64 ms. Allocated memory is still 92.3 MB. Free memory was 56.3 MB in the beginning and 55.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 657.19 ms. Allocated memory is still 92.3 MB. Free memory was 55.1 MB in the beginning and 67.6 MB in the end (delta: -12.5 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12828.47 ms. Allocated memory was 92.3 MB in the beginning and 243.3 MB in the end (delta: 151.0 MB). Free memory was 67.6 MB in the beginning and 95.0 MB in the end (delta: -27.4 MB). Peak memory consumption was 122.0 MB. Max. memory is 16.1 GB. * Witness Printer took 62.96 ms. Allocated memory is still 243.3 MB. Free memory was 95.0 MB in the beginning and 91.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 12.7s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.4s, 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, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 7.9s 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, 0.2s SatisfiabilityAnalysisTime, 2.1s 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...