./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c --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_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/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 a6853fb9e064ccfef5e54a8bac94eb86beeed80f ............................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:38:13,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:38:13,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:38:13,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:38:13,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:38:13,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:38:13,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:38:13,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:38:13,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:38:13,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:38:13,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:38:13,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:38:13,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:38:13,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:38:13,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:38:13,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:38:13,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:38:13,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:38:13,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:38:13,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:38:13,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:38:13,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:38:13,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:38:13,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:38:13,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:38:13,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:38:13,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:38:13,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:38:13,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:38:13,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:38:13,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:38:13,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:38:13,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:38:13,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:38:13,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:38:13,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:38:13,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:38:13,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:38:13,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:38:13,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:38:13,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:38:13,246 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-03 12:38:13,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:38:13,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:38:13,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:38:13,273 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:38:13,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:38:13,273 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:38:13,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:38:13,274 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:38:13,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:38:13,274 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:38:13,274 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:38:13,275 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:38:13,275 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:38:13,275 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:38:13,275 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:38:13,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:38:13,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:38:13,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:38:13,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:38:13,277 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:38:13,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:38:13,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:38:13,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:38:13,278 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:38:13,278 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:38:13,278 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:38:13,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:38:13,279 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:38:13,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:38:13,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:38:13,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:38:13,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:38:13,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:38:13,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:38:13,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:38:13,280 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:38:13,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:38:13,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:38:13,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:38:13,281 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_2f306615-0de0-4167-881f-0b5372e9291b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6853fb9e064ccfef5e54a8bac94eb86beeed80f [2020-12-03 12:38:13,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:38:13,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:38:13,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:38:13,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:38:13,575 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:38:13,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2020-12-03 12:38:13,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/data/caa705342/5fd8bd8b2cda451c8aba96a3bd8983df/FLAGf2bcb1958 [2020-12-03 12:38:14,106 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:38:14,109 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2020-12-03 12:38:14,121 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/data/caa705342/5fd8bd8b2cda451c8aba96a3bd8983df/FLAGf2bcb1958 [2020-12-03 12:38:14,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/data/caa705342/5fd8bd8b2cda451c8aba96a3bd8983df [2020-12-03 12:38:14,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:38:14,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:38:14,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:14,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:38:14,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:38:14,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d355f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14, skipping insertion in model container [2020-12-03 12:38:14,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:38:14,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:38:14,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:14,687 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:38:14,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:14,720 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:38:14,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14 WrapperNode [2020-12-03 12:38:14,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:14,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:14,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:38:14,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:38:14,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:14,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:38:14,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:38:14,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:38:14,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... [2020-12-03 12:38:14,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:38:14,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:38:14,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:38:14,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:38:14,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/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 12:38:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:38:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:38:14,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:38:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:38:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:38:14,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:38:15,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:38:15,528 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-03 12:38:15,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:15 BoogieIcfgContainer [2020-12-03 12:38:15,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:38:15,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:38:15,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:38:15,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:38:15,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:38:14" (1/3) ... [2020-12-03 12:38:15,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ae80e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:15, skipping insertion in model container [2020-12-03 12:38:15,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:14" (2/3) ... [2020-12-03 12:38:15,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ae80e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:15, skipping insertion in model container [2020-12-03 12:38:15,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:15" (3/3) ... [2020-12-03 12:38:15,546 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-write.c [2020-12-03 12:38:15,561 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:38:15,565 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-12-03 12:38:15,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-12-03 12:38:15,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:38:15,596 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:38:15,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:38:15,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:38:15,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:38:15,596 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:38:15,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:38:15,597 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:38:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-03 12:38:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:38:15,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:15,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:38:15,622 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:38:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash 3894484, now seen corresponding path program 1 times [2020-12-03 12:38:15,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:15,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481013701] [2020-12-03 12:38:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:15,819 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 12:38:15,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481013701] [2020-12-03 12:38:15,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:15,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:15,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658014446] [2020-12-03 12:38:15,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:15,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:15,850 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-03 12:38:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:15,918 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-03 12:38:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:15,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:38:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:15,929 INFO L225 Difference]: With dead ends: 39 [2020-12-03 12:38:15,930 INFO L226 Difference]: Without dead ends: 38 [2020-12-03 12:38:15,931 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 12:38:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-03 12:38:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-12-03 12:38:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:38:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-03 12:38:15,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2020-12-03 12:38:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:15,966 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-03 12:38:15,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-03 12:38:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:38:15,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:15,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:38:15,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:38:15,968 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:38:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:15,968 INFO L82 PathProgramCache]: Analyzing trace with hash 3793645, now seen corresponding path program 1 times [2020-12-03 12:38:15,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:15,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718540196] [2020-12-03 12:38:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:16,068 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 12:38:16,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718540196] [2020-12-03 12:38:16,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:16,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:16,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280785416] [2020-12-03 12:38:16,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:38:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:38:16,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:38:16,077 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-12-03 12:38:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:16,138 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-03 12:38:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:38:16,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:38:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:16,140 INFO L225 Difference]: With dead ends: 22 [2020-12-03 12:38:16,140 INFO L226 Difference]: Without dead ends: 22 [2020-12-03 12:38:16,141 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 [2020-12-03 12:38:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-03 12:38:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-03 12:38:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-03 12:38:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-03 12:38:16,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2020-12-03 12:38:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:16,145 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-03 12:38:16,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:38:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-03 12:38:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:38:16,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:16,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:38:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:38:16,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:38:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 3793646, now seen corresponding path program 1 times [2020-12-03 12:38:16,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:16,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651411928] [2020-12-03 12:38:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:16,215 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 12:38:16,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651411928] [2020-12-03 12:38:16,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:16,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:16,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720020953] [2020-12-03 12:38:16,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:38:16,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:38:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:38:16,218 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-12-03 12:38:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:16,335 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-03 12:38:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:38:16,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:38:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:16,336 INFO L225 Difference]: With dead ends: 51 [2020-12-03 12:38:16,337 INFO L226 Difference]: Without dead ends: 51 [2020-12-03 12:38:16,337 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 [2020-12-03 12:38:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-03 12:38:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 24. [2020-12-03 12:38:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:38:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-03 12:38:16,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 4 [2020-12-03 12:38:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:16,343 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-03 12:38:16,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:38:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-03 12:38:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:38:16,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:16,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:38:16,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:38:16,344 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:38:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:16,345 INFO L82 PathProgramCache]: Analyzing trace with hash 117602987, now seen corresponding path program 1 times [2020-12-03 12:38:16,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:16,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383167155] [2020-12-03 12:38:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:16,382 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 12:38:16,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383167155] [2020-12-03 12:38:16,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:16,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:16,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851270718] [2020-12-03 12:38:16,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:16,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:16,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:16,389 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-12-03 12:38:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:16,419 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-03 12:38:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:16,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:38:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:16,420 INFO L225 Difference]: With dead ends: 23 [2020-12-03 12:38:16,420 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:38:16,421 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 12:38:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:38:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-03 12:38:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:38:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-03 12:38:16,425 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2020-12-03 12:38:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:16,425 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-03 12:38:16,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-03 12:38:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:38:16,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:16,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:38:16,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:38:16,427 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:38:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash 117602988, now seen corresponding path program 1 times [2020-12-03 12:38:16,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:16,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434783888] [2020-12-03 12:38:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:38:16,451 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:38:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:38:16,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:38:16,497 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:38:16,497 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:38:16,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:38:16,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:38:16 BoogieIcfgContainer [2020-12-03 12:38:16,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:38:16,516 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:38:16,516 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:38:16,516 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:38:16,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:15" (3/4) ... [2020-12-03 12:38:16,518 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:38:16,551 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2f306615-0de0-4167-881f-0b5372e9291b/bin/utaipan/witness.graphml [2020-12-03 12:38:16,552 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:38:16,553 INFO L168 Benchmark]: Toolchain (without parser) took 2077.14 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 70.8 MB in the beginning and 79.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:16,554 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 100.7 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:16,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.07 ms. Allocated memory is still 100.7 MB. Free memory was 70.8 MB in the beginning and 76.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:16,555 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.09 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 74.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:16,556 INFO L168 Benchmark]: Boogie Preprocessor took 55.82 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:16,557 INFO L168 Benchmark]: RCFGBuilder took 693.33 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 73.8 MB in the beginning and 102.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:16,557 INFO L168 Benchmark]: TraceAbstraction took 982.60 ms. Allocated memory is still 127.9 MB. Free memory was 101.4 MB in the beginning and 80.1 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:16,558 INFO L168 Benchmark]: Witness Printer took 36.03 ms. Allocated memory is still 127.9 MB. Free memory was 80.1 MB in the beginning and 79.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:16,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 100.7 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 244.07 ms. Allocated memory is still 100.7 MB. Free memory was 70.8 MB in the beginning and 76.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.09 ms. Allocated memory is still 100.7 MB. Free memory was 76.5 MB in the beginning and 74.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.82 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 693.33 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 73.8 MB in the beginning and 102.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 982.60 ms. Allocated memory is still 127.9 MB. Free memory was 101.4 MB in the beginning and 80.1 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. * Witness Printer took 36.03 ms. Allocated memory is still 127.9 MB. Free memory was 80.1 MB in the beginning and 79.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 [L33] COND TRUE i < 100 [L21] int a[n], i; [L22] i = 0 [L22] COND TRUE i < size [L23] EXPR b[i] [L23] a[i] = b[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 96 SDslu, 36 SDs, 0 SdLazy, 100 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...