./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/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 10bdb405bd6bca2bddb8b686c44dad291e109402 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:37:47,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:37:47,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:37:47,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:37:47,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:37:47,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:37:47,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:37:47,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:37:47,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:37:47,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:37:47,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:37:47,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:37:47,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:37:47,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:37:47,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:37:47,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:37:47,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:37:47,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:37:47,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:37:47,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:37:47,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:37:47,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:37:47,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:37:47,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:37:47,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:37:47,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:37:47,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:37:47,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:37:47,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:37:47,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:37:47,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:37:47,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:37:47,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:37:47,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:37:47,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:37:47,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:37:47,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:37:47,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:37:47,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:37:47,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:37:47,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:37:47,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-03 12:37:47,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:37:47,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:37:47,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:37:47,254 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:37:47,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:37:47,255 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:37:47,255 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:37:47,255 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:37:47,255 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:37:47,256 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:37:47,256 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:37:47,256 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:37:47,257 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:37:47,257 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:37:47,257 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:37:47,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:37:47,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:37:47,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:37:47,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:37:47,259 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:37:47,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:37:47,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:37:47,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:37:47,260 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:37:47,260 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:37:47,260 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:37:47,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:37:47,261 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:37:47,261 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:37:47,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:37:47,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:37:47,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:37:47,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:37:47,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:37:47,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:37:47,263 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:37:47,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:37:47,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:37:47,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:37:47,264 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_743062c7-eb99-4469-8866-ec3b147e9e41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10bdb405bd6bca2bddb8b686c44dad291e109402 [2020-12-03 12:37:47,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:37:47,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:37:47,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:37:47,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:37:47,515 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:37:47,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-03 12:37:47,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/data/a34e3d651/2b1b7aee159944fb8c326b93235ba7e8/FLAG9be98d4bc [2020-12-03 12:37:48,075 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:37:48,076 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-03 12:37:48,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/data/a34e3d651/2b1b7aee159944fb8c326b93235ba7e8/FLAG9be98d4bc [2020-12-03 12:37:48,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/data/a34e3d651/2b1b7aee159944fb8c326b93235ba7e8 [2020-12-03 12:37:48,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:37:48,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:37:48,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:37:48,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:37:48,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:37:48,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c292f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48, skipping insertion in model container [2020-12-03 12:37:48,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:37:48,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:37:48,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:37:48,855 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:37:48,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:37:48,941 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:37:48,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48 WrapperNode [2020-12-03 12:37:48,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:37:48,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:37:48,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:37:48,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:37:48,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:37:48,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:37:48,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:37:48,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:37:48,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:48,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:49,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:49,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... [2020-12-03 12:37:49,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:37:49,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:37:49,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:37:49,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:37:49,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/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 [2020-12-03 12:37:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:37:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:37:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:37:49,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:37:49,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:37:49,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:37:49,554 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-03 12:37:49,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:49 BoogieIcfgContainer [2020-12-03 12:37:49,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:37:49,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:37:49,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:37:49,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:37:49,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:37:48" (1/3) ... [2020-12-03 12:37:49,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57942b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:37:49, skipping insertion in model container [2020-12-03 12:37:49,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:48" (2/3) ... [2020-12-03 12:37:49,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57942b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:37:49, skipping insertion in model container [2020-12-03 12:37:49,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:49" (3/3) ... [2020-12-03 12:37:49,578 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2020-12-03 12:37:49,591 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:37:49,594 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-03 12:37:49,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-03 12:37:49,624 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:37:49,624 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:37:49,624 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:37:49,625 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:37:49,625 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:37:49,625 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:37:49,625 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:37:49,625 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:37:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-03 12:37:49,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:37:49,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:49,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:37:49,644 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-03 12:37:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2609821, now seen corresponding path program 1 times [2020-12-03 12:37:49,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:49,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021969748] [2020-12-03 12:37:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:49,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021969748] [2020-12-03 12:37:49,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:49,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:37:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732500650] [2020-12-03 12:37:49,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:37:49,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:37:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:37:49,953 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2020-12-03 12:37:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:50,035 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-12-03 12:37:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:37:50,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-03 12:37:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:50,047 INFO L225 Difference]: With dead ends: 11 [2020-12-03 12:37:50,047 INFO L226 Difference]: Without dead ends: 10 [2020-12-03 12:37:50,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:37:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-03 12:37:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-03 12:37:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-03 12:37:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-03 12:37:50,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2020-12-03 12:37:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:50,082 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-03 12:37:50,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:37:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-03 12:37:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:37:50,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:50,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:37:50,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:37:50,083 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-03 12:37:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2609822, now seen corresponding path program 1 times [2020-12-03 12:37:50,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:50,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087561292] [2020-12-03 12:37:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:50,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087561292] [2020-12-03 12:37:50,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:50,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:37:50,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310110611] [2020-12-03 12:37:50,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:37:50,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:50,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:37:50,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:37:50,222 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2020-12-03 12:37:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:50,324 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-03 12:37:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:37:50,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-03 12:37:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:50,325 INFO L225 Difference]: With dead ends: 14 [2020-12-03 12:37:50,326 INFO L226 Difference]: Without dead ends: 14 [2020-12-03 12:37:50,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:37:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-03 12:37:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2020-12-03 12:37:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-03 12:37:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-03 12:37:50,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2020-12-03 12:37:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:50,333 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-03 12:37:50,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:37:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-03 12:37:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:37:50,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:50,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:37:50,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:37:50,335 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-03 12:37:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2629898, now seen corresponding path program 1 times [2020-12-03 12:37:50,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:50,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263857671] [2020-12-03 12:37:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:50,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263857671] [2020-12-03 12:37:50,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:50,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:37:50,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808323164] [2020-12-03 12:37:50,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:37:50,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:50,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:37:50,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:37:50,477 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2020-12-03 12:37:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:50,491 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-03 12:37:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:37:50,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:37:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:50,492 INFO L225 Difference]: With dead ends: 11 [2020-12-03 12:37:50,492 INFO L226 Difference]: Without dead ends: 11 [2020-12-03 12:37:50,493 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 [2020-12-03 12:37:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-03 12:37:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-03 12:37:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-03 12:37:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-03 12:37:50,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-12-03 12:37:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:50,495 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-03 12:37:50,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:37:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-03 12:37:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:37:50,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:50,496 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-03 12:37:50,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:37:50,497 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-03 12:37:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash 440602860, now seen corresponding path program 1 times [2020-12-03 12:37:50,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:50,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914094063] [2020-12-03 12:37:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:50,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914094063] [2020-12-03 12:37:50,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039847382] [2020-12-03 12:37:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/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 [2020-12-03 12:37:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:50,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-03 12:37:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:50,961 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-03 12:37:50,962 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:37:50,971 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:37:50,972 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:37:50,973 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-03 12:37:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:51,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:51,402 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:37:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:51,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410738083] [2020-12-03 12:37:51,524 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-03 12:37:51,524 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:51,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:51,533 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:51,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:52,420 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:52,840 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-03 12:37:53,226 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-03 12:37:53,581 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-03 12:37:53,665 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:37:53,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:53,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2020-12-03 12:37:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263969488] [2020-12-03 12:37:53,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-03 12:37:53,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:53,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-03 12:37:53,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-12-03 12:37:53,671 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2020-12-03 12:37:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:53,985 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-12-03 12:37:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:37:53,986 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 7 [2020-12-03 12:37:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:53,987 INFO L225 Difference]: With dead ends: 14 [2020-12-03 12:37:53,987 INFO L226 Difference]: Without dead ends: 14 [2020-12-03 12:37:53,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-12-03 12:37:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-03 12:37:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-03 12:37:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-03 12:37:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-03 12:37:53,992 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2020-12-03 12:37:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:53,993 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-03 12:37:53,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-03 12:37:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-03 12:37:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:37:53,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:53,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:37:54,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-12-03 12:37:54,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-03 12:37:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:54,202 INFO L82 PathProgramCache]: Analyzing trace with hash 440601794, now seen corresponding path program 1 times [2020-12-03 12:37:54,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:54,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547843414] [2020-12-03 12:37:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:54,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547843414] [2020-12-03 12:37:54,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:54,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:37:54,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309080728] [2020-12-03 12:37:54,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:37:54,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:37:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:37:54,252 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-12-03 12:37:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:54,262 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-12-03 12:37:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:37:54,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-03 12:37:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:54,263 INFO L225 Difference]: With dead ends: 13 [2020-12-03 12:37:54,263 INFO L226 Difference]: Without dead ends: 11 [2020-12-03 12:37:54,264 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 [2020-12-03 12:37:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-03 12:37:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-03 12:37:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-03 12:37:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-03 12:37:54,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2020-12-03 12:37:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:54,271 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-03 12:37:54,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:37:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-03 12:37:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:37:54,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:54,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-12-03 12:37:54,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-03 12:37:54,273 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-03 12:37:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash 580552670, now seen corresponding path program 2 times [2020-12-03 12:37:54,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:54,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313358530] [2020-12-03 12:37:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:54,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313358530] [2020-12-03 12:37:54,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515367421] [2020-12-03 12:37:54,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/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 [2020-12-03 12:37:54,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-03 12:37:54,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:37:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-03 12:37:54,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:54,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:55,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780782158] [2020-12-03 12:37:55,533 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-03 12:37:55,533 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:55,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:55,533 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:55,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:56,030 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:56,397 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-03 12:37:56,783 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-03 12:37:57,141 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-03 12:37:57,233 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:37:57,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:57,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2020-12-03 12:37:57,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265322367] [2020-12-03 12:37:57,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-03 12:37:57,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-03 12:37:57,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-12-03 12:37:57,235 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 26 states. [2020-12-03 12:37:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:58,238 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-03 12:37:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-03 12:37:58,238 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 10 [2020-12-03 12:37:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:58,239 INFO L225 Difference]: With dead ends: 20 [2020-12-03 12:37:58,239 INFO L226 Difference]: Without dead ends: 20 [2020-12-03 12:37:58,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2020-12-03 12:37:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-03 12:37:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-03 12:37:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:37:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-03 12:37:58,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-12-03 12:37:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:58,242 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-03 12:37:58,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-03 12:37:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-03 12:37:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-03 12:37:58,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:58,243 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2020-12-03 12:37:58,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:58,445 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-03 12:37:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1511687788, now seen corresponding path program 3 times [2020-12-03 12:37:58,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:58,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125294466] [2020-12-03 12:37:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:58,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125294466] [2020-12-03 12:37:58,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921428075] [2020-12-03 12:37:58,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/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 [2020-12-03 12:37:59,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:37:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:37:59,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-03 12:37:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:59,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:00,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782511853] [2020-12-03 12:38:00,792 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-03 12:38:00,792 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:00,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:00,793 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:00,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:01,432 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:38:01,809 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-03 12:38:02,073 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-03 12:38:02,444 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-03 12:38:02,752 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-03 12:38:02,876 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:38:02,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:02,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2020-12-03 12:38:02,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576016142] [2020-12-03 12:38:02,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-03 12:38:02,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-03 12:38:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2020-12-03 12:38:02,879 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 41 states. [2020-12-03 12:38:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:04,678 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-03 12:38:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-03 12:38:04,679 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 19 [2020-12-03 12:38:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:04,679 INFO L225 Difference]: With dead ends: 22 [2020-12-03 12:38:04,679 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:38:04,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=475, Invalid=3815, Unknown=0, NotChecked=0, Total=4290 [2020-12-03 12:38:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:38:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:38:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:38:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:38:04,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-12-03 12:38:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:04,683 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:38:04,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-03 12:38:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:38:04,683 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:38:04,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:04,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:38:04 BoogieIcfgContainer [2020-12-03 12:38:04,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:38:04,902 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:38:04,902 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:38:04,903 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:38:04,903 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:49" (3/4) ... [2020-12-03 12:38:04,906 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:38:04,916 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-12-03 12:38:04,916 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-03 12:38:04,917 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-03 12:38:04,955 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_743062c7-eb99-4469-8866-ec3b147e9e41/bin/utaipan/witness.graphml [2020-12-03 12:38:04,955 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:38:04,956 INFO L168 Benchmark]: Toolchain (without parser) took 16533.35 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 87.3 MB in the beginning and 214.3 MB in the end (delta: -127.1 MB). Peak memory consumption was 45.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:04,956 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 47.7 MB in the beginning and 47.6 MB in the end (delta: 61.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:04,957 INFO L168 Benchmark]: CACSL2BoogieTranslator took 518.94 ms. Allocated memory is still 113.2 MB. Free memory was 87.0 MB in the beginning and 78.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:04,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.84 ms. Allocated memory is still 113.2 MB. Free memory was 78.1 MB in the beginning and 76.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:04,957 INFO L168 Benchmark]: Boogie Preprocessor took 22.98 ms. Allocated memory is still 113.2 MB. Free memory was 76.2 MB in the beginning and 75.3 MB in the end (delta: 946.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:04,958 INFO L168 Benchmark]: RCFGBuilder took 549.54 ms. Allocated memory is still 113.2 MB. Free memory was 75.3 MB in the beginning and 52.5 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:04,958 INFO L168 Benchmark]: TraceAbstraction took 15336.19 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 89.5 MB in the beginning and 217.0 MB in the end (delta: -127.5 MB). Peak memory consumption was 44.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:04,959 INFO L168 Benchmark]: Witness Printer took 52.90 ms. Allocated memory is still 285.2 MB. Free memory was 217.0 MB in the beginning and 214.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:04,962 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 47.7 MB in the beginning and 47.6 MB in the end (delta: 61.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 518.94 ms. Allocated memory is still 113.2 MB. Free memory was 87.0 MB in the beginning and 78.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.84 ms. Allocated memory is still 113.2 MB. Free memory was 78.1 MB in the beginning and 76.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.98 ms. Allocated memory is still 113.2 MB. Free memory was 76.2 MB in the beginning and 75.3 MB in the end (delta: 946.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 549.54 ms. Allocated memory is still 113.2 MB. Free memory was 75.3 MB in the beginning and 52.5 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15336.19 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 89.5 MB in the beginning and 217.0 MB in the end (delta: -127.5 MB). Peak memory consumption was 44.4 MB. Max. memory is 16.1 GB. * Witness Printer took 52.90 ms. Allocated memory is still 285.2 MB. Free memory was 217.0 MB in the beginning and 214.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 523]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.2s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 22 SDslu, 55 SDs, 0 SdLazy, 684 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 26994 SizeOfPredicates, 39 NumberOfNonLiveVariables, 318 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 15/147 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...