./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/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 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-28 07:42:57,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:42:57,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:42:57,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:42:57,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:42:57,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:42:57,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:42:57,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:42:57,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:42:57,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:42:57,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:42:57,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:42:57,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:42:57,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:42:57,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:42:57,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:42:57,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:42:57,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:42:57,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:42:57,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:42:57,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:42:57,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:42:57,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:42:57,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:42:57,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:42:57,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:42:57,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:42:57,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:42:57,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:42:57,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:42:57,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:42:57,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:42:57,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:42:57,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:42:57,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:42:57,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:42:57,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:42:57,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:42:57,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:42:57,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:42:57,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:42:57,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:42:57,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:42:57,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:42:57,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:42:57,479 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:42:57,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:42:57,480 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:42:57,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:42:57,480 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:42:57,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:42:57,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:42:57,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:42:57,481 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:42:57,481 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:42:57,481 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:42:57,482 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:42:57,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:42:57,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:42:57,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:42:57,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:42:57,483 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:42:57,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:42:57,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:42:57,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:42:57,484 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:42:57,484 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:42:57,484 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:42:57,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:42:57,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:42:57,485 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:42:57,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:42:57,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:42:57,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:42:57,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:42:57,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:57,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:42:57,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:42:57,486 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:42:57,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:42:57,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:42:57,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:42:57,487 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_b0123910-bc74-46ea-af6d-ed224f500b74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2020-11-28 07:42:57,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:42:57,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:42:57,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:42:57,777 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:42:57,778 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:42:57,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-11-28 07:42:57,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/data/c40d5017f/5610d0e02a204d86acbd1b0c97f7dc3b/FLAGc1cbcd58c [2020-11-28 07:42:58,356 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:42:58,356 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-11-28 07:42:58,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/data/c40d5017f/5610d0e02a204d86acbd1b0c97f7dc3b/FLAGc1cbcd58c [2020-11-28 07:42:58,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/data/c40d5017f/5610d0e02a204d86acbd1b0c97f7dc3b [2020-11-28 07:42:58,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:42:58,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:42:58,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:58,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:42:58,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:42:58,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:58" (1/1) ... [2020-11-28 07:42:58,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598750b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:58, skipping insertion in model container [2020-11-28 07:42:58,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:58" (1/1) ... [2020-11-28 07:42:58,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:42:58,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:42:59,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:59,011 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:42:59,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:59,110 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:42:59,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59 WrapperNode [2020-11-28 07:42:59,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:59,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:59,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:42:59,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:42:59,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:59,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:42:59,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:42:59,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:42:59,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... [2020-11-28 07:42:59,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:42:59,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:42:59,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:42:59,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:42:59,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:42:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:42:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:42:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:42:59,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:42:59,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:43:00,011 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:43:00,012 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 07:43:00,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:00 BoogieIcfgContainer [2020-11-28 07:43:00,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:43:00,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:43:00,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:43:00,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:43:00,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:42:58" (1/3) ... [2020-11-28 07:43:00,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9d1b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:00, skipping insertion in model container [2020-11-28 07:43:00,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:59" (2/3) ... [2020-11-28 07:43:00,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9d1b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:00, skipping insertion in model container [2020-11-28 07:43:00,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:00" (3/3) ... [2020-11-28 07:43:00,023 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2020-11-28 07:43:00,034 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:43:00,038 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-11-28 07:43:00,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-11-28 07:43:00,075 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:43:00,076 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:43:00,076 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:43:00,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:43:00,076 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:43:00,077 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:43:00,077 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:43:00,077 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:43:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-28 07:43:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:43:00,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:00,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:43:00,098 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:43:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash 157381, now seen corresponding path program 1 times [2020-11-28 07:43:00,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:00,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090363497] [2020-11-28 07:43:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:00,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090363497] [2020-11-28 07:43:00,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:00,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:43:00,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022755259] [2020-11-28 07:43:00,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:00,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:00,347 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-11-28 07:43:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:00,439 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-28 07:43:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:00,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:43:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:00,448 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:43:00,448 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 07:43:00,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 07:43:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-28 07:43:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 07:43:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-11-28 07:43:00,493 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 3 [2020-11-28 07:43:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:00,494 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-11-28 07:43:00,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-11-28 07:43:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:43:00,495 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:00,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:43:00,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:43:00,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:43:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash 157382, now seen corresponding path program 1 times [2020-11-28 07:43:00,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:00,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18698716] [2020-11-28 07:43:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:00,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18698716] [2020-11-28 07:43:00,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:00,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715200151] [2020-11-28 07:43:00,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:43:00,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:43:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:43:00,616 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 4 states. [2020-11-28 07:43:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:00,741 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-28 07:43:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:00,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:43:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:00,742 INFO L225 Difference]: With dead ends: 40 [2020-11-28 07:43:00,742 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 07:43:00,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:43:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 07:43:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-28 07:43:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 07:43:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-28 07:43:00,748 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 3 [2020-11-28 07:43:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:00,748 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-28 07:43:00,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:43:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-28 07:43:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:43:00,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:00,749 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-28 07:43:00,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:43:00,749 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:43:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash 151338058, now seen corresponding path program 1 times [2020-11-28 07:43:00,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:00,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530187030] [2020-11-28 07:43:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:00,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530187030] [2020-11-28 07:43:00,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163203798] [2020-11-28 07:43:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:43:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:01,007 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-11-28 07:43:01,007 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:43:01,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:43:01,015 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:43:01,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2020-11-28 07:43:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:01,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:01,154 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-28 07:43:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613389332] [2020-11-28 07:43:01,227 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-28 07:43:01,228 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:43:01,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:43:01,241 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:43:01,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:43:01,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:01,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:01,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:01,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:01,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:01,965 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:43:02,360 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-11-28 07:43:02,480 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:43:02,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:43:02,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2020-11-28 07:43:02,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095099958] [2020-11-28 07:43:02,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:43:02,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:43:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:43:02,483 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2020-11-28 07:43:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:02,775 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-28 07:43:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:43:02,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2020-11-28 07:43:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:02,776 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:43:02,776 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 07:43:02,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:43:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 07:43:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-28 07:43:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 07:43:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-11-28 07:43:02,782 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 5 [2020-11-28 07:43:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:02,782 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-11-28 07:43:02,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:43:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-11-28 07:43:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:43:02,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:02,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:43:02,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:43:02,998 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:43:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash 396616665, now seen corresponding path program 1 times [2020-11-28 07:43:02,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:02,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140806885] [2020-11-28 07:43:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:03,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140806885] [2020-11-28 07:43:03,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49652676] [2020-11-28 07:43:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:43:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:03,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:03,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638716788] [2020-11-28 07:43:03,225 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:43:03,225 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:43:03,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:43:03,226 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:43:03,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:43:03,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:03,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:03,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:03,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:03,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:43:03,782 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:43:04,079 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-11-28 07:43:04,409 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-11-28 07:43:04,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:43:04,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4] total 10 [2020-11-28 07:43:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943422522] [2020-11-28 07:43:04,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:43:04,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:43:04,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:43:04,412 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2020-11-28 07:43:04,607 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-11-28 07:43:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:04,870 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-11-28 07:43:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:43:04,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-28 07:43:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:04,873 INFO L225 Difference]: With dead ends: 73 [2020-11-28 07:43:04,873 INFO L226 Difference]: Without dead ends: 73 [2020-11-28 07:43:04,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:43:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-28 07:43:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2020-11-28 07:43:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 07:43:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-11-28 07:43:04,879 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2020-11-28 07:43:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:04,879 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-11-28 07:43:04,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:43:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-11-28 07:43:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:43:04,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:04,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:05,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-28 07:43:05,106 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:43:05,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:05,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2120707428, now seen corresponding path program 1 times [2020-11-28 07:43:05,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:05,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865213624] [2020-11-28 07:43:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:43:05,136 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:43:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:43:05,154 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:43:05,177 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:43:05,178 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:43:05,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-28 07:43:05,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:43:05 BoogieIcfgContainer [2020-11-28 07:43:05,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:43:05,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:43:05,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:43:05,201 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:43:05,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:00" (3/4) ... [2020-11-28 07:43:05,204 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:43:05,239 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b0123910-bc74-46ea-af6d-ed224f500b74/bin/utaipan/witness.graphml [2020-11-28 07:43:05,239 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:43:05,240 INFO L168 Benchmark]: Toolchain (without parser) took 6570.04 ms. Allocated memory was 107.0 MB in the beginning and 167.8 MB in the end (delta: 60.8 MB). Free memory was 78.6 MB in the beginning and 81.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:05,241 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 64.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:43:05,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.10 ms. Allocated memory is still 107.0 MB. Free memory was 78.3 MB in the beginning and 73.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:05,242 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.59 ms. Allocated memory is still 107.0 MB. Free memory was 73.0 MB in the beginning and 71.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:05,242 INFO L168 Benchmark]: Boogie Preprocessor took 28.07 ms. Allocated memory is still 107.0 MB. Free memory was 71.0 MB in the beginning and 69.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:05,243 INFO L168 Benchmark]: RCFGBuilder took 820.57 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 69.5 MB in the beginning and 100.0 MB in the end (delta: -30.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:05,243 INFO L168 Benchmark]: TraceAbstraction took 5184.47 ms. Allocated memory was 138.4 MB in the beginning and 167.8 MB in the end (delta: 29.4 MB). Free memory was 99.6 MB in the beginning and 83.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:05,244 INFO L168 Benchmark]: Witness Printer took 38.73 ms. Allocated memory is still 167.8 MB. Free memory was 83.4 MB in the beginning and 81.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:05,246 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 64.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 439.10 ms. Allocated memory is still 107.0 MB. Free memory was 78.3 MB in the beginning and 73.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.59 ms. Allocated memory is still 107.0 MB. Free memory was 73.0 MB in the beginning and 71.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.07 ms. Allocated memory is still 107.0 MB. Free memory was 71.0 MB in the beginning and 69.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 820.57 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 69.5 MB in the beginning and 100.0 MB in the end (delta: -30.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5184.47 ms. Allocated memory was 138.4 MB in the beginning and 167.8 MB in the end (delta: 29.4 MB). Free memory was 99.6 MB in the beginning and 83.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. * Witness Printer took 38.73 ms. Allocated memory is still 167.8 MB. Free memory was 83.4 MB in the beginning and 81.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND FALSE !(length < 1) [L518] COND FALSE !(length % 2 == 0) [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() [L521] i++ [L521] COND FALSE !(i < length) [L526] i=0 [L526] COND TRUE i