./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs --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 f9f8e12a96bbd82b23d1fc92b67fc377b3c783a366d4cad2924c946b146eff3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:15:26,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:15:26,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:15:26,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:15:26,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:15:26,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:15:26,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:15:26,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:15:26,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:15:26,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:15:26,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:15:26,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:15:26,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:15:26,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:15:26,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:15:26,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:15:26,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:15:26,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:15:26,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:15:26,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:15:26,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:15:26,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:15:26,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:15:26,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:15:26,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:15:26,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:15:26,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:15:26,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:15:26,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:15:26,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:15:26,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:15:26,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:15:26,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:15:26,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:15:26,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:15:26,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:15:26,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:15:26,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:15:26,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:15:26,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:15:26,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:15:26,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-19 14:15:27,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:15:27,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:15:27,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:15:27,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:15:27,043 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:15:27,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:15:27,043 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:15:27,043 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:15:27,044 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:15:27,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:15:27,045 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:15:27,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:15:27,046 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:15:27,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:15:27,047 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:15:27,047 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:15:27,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 14:15:27,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 14:15:27,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:15:27,049 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:15:27,049 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 14:15:27,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:15:27,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:15:27,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:15:27,050 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 14:15:27,050 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 14:15:27,052 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 14:15:27,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:15:27,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:15:27,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:15:27,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:15:27,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:15:27,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:15:27,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:15:27,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:15:27,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:15:27,056 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:15:27,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:15:27,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:15:27,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:15:27,057 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_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9f8e12a96bbd82b23d1fc92b67fc377b3c783a366d4cad2924c946b146eff3f [2021-11-19 14:15:27,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:15:27,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:15:27,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:15:27,539 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:15:27,540 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:15:27,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2021-11-19 14:15:27,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/data/88d8cce04/8373d0b265f94bc59980ad2bb7c05617/FLAG1bfb06f0b [2021-11-19 14:15:28,336 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:15:28,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2021-11-19 14:15:28,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/data/88d8cce04/8373d0b265f94bc59980ad2bb7c05617/FLAG1bfb06f0b [2021-11-19 14:15:28,605 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/data/88d8cce04/8373d0b265f94bc59980ad2bb7c05617 [2021-11-19 14:15:28,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:15:28,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:15:28,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:15:28,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:15:28,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:15:28,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:15:28" (1/1) ... [2021-11-19 14:15:28,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d493d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:28, skipping insertion in model container [2021-11-19 14:15:28,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:15:28" (1/1) ... [2021-11-19 14:15:28,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:15:28,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:15:29,113 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:15:29,128 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:15:29,241 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:15:29,294 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:15:29,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29 WrapperNode [2021-11-19 14:15:29,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:15:29,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:15:29,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:15:29,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:15:29,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,396 INFO L137 Inliner]: procedures = 115, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2021-11-19 14:15:29,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:15:29,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:15:29,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:15:29,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:15:29,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:15:29,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:15:29,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:15:29,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:15:29,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (1/1) ... [2021-11-19 14:15:29,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:15:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:29,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:15:29,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:15:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 14:15:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 14:15:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:15:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:15:29,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:15:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:15:29,647 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:15:29,649 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:15:29,839 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:15:29,897 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:15:29,898 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 14:15:29,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:15:29 BoogieIcfgContainer [2021-11-19 14:15:29,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:15:29,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:15:29,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:15:29,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:15:29,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:15:28" (1/3) ... [2021-11-19 14:15:29,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb88552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:15:29, skipping insertion in model container [2021-11-19 14:15:29,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:15:29" (2/3) ... [2021-11-19 14:15:29,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb88552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:15:29, skipping insertion in model container [2021-11-19 14:15:29,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:15:29" (3/3) ... [2021-11-19 14:15:29,912 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down_unsafe.i [2021-11-19 14:15:29,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:15:29,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-19 14:15:29,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:15:30,021 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:15:30,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-19 14:15:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 2.272727272727273) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-19 14:15:30,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:30,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-19 14:15:30,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 14:15:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash 115767, now seen corresponding path program 1 times [2021-11-19 14:15:30,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:15:30,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407319967] [2021-11-19 14:15:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:30,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:15:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:30,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:15:30,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407319967] [2021-11-19 14:15:30,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407319967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:30,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:30,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:15:30,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885103058] [2021-11-19 14:15:30,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:30,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:15:30,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:15:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:15:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:15:30,331 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 2.272727272727273) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:30,390 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-19 14:15:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:15:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-19 14:15:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:30,403 INFO L225 Difference]: With dead ends: 21 [2021-11-19 14:15:30,404 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 14:15:30,406 INFO L932 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 [2021-11-19 14:15:30,411 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:30,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 6 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:15:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 14:15:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-19 14:15:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 2.0) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-19 14:15:30,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 3 [2021-11-19 14:15:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:30,454 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-19 14:15:30,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-19 14:15:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:15:30,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:30,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:15:30,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:15:30,481 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 14:15:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:30,483 INFO L85 PathProgramCache]: Analyzing trace with hash 3591225, now seen corresponding path program 1 times [2021-11-19 14:15:30,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:15:30,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055867738] [2021-11-19 14:15:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:30,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:15:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:30,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:15:30,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055867738] [2021-11-19 14:15:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055867738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:30,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:30,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-19 14:15:30,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077806708] [2021-11-19 14:15:30,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:30,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:15:30,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:15:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:15:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:15:30,546 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:30,576 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-19 14:15:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:15:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-19 14:15:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:30,578 INFO L225 Difference]: With dead ends: 16 [2021-11-19 14:15:30,578 INFO L226 Difference]: Without dead ends: 16 [2021-11-19 14:15:30,579 INFO L932 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 [2021-11-19 14:15:30,581 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:30,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 5 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:15:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-19 14:15:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-19 14:15:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-19 14:15:30,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 4 [2021-11-19 14:15:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:30,587 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-19 14:15:30,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-19 14:15:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:15:30,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:30,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:15:30,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:15:30,590 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 14:15:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:30,591 INFO L85 PathProgramCache]: Analyzing trace with hash 3591226, now seen corresponding path program 1 times [2021-11-19 14:15:30,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:15:30,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605818058] [2021-11-19 14:15:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:30,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:15:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:15:30,623 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:15:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:15:30,703 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:15:30,704 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:15:30,705 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (8 of 9 remaining) [2021-11-19 14:15:30,709 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (7 of 9 remaining) [2021-11-19 14:15:30,710 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (6 of 9 remaining) [2021-11-19 14:15:30,711 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 9 remaining) [2021-11-19 14:15:30,711 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (4 of 9 remaining) [2021-11-19 14:15:30,712 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (3 of 9 remaining) [2021-11-19 14:15:30,712 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (2 of 9 remaining) [2021-11-19 14:15:30,713 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (1 of 9 remaining) [2021-11-19 14:15:30,714 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2021-11-19 14:15:30,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:15:30,724 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-19 14:15:30,729 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:15:30,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:15:30 BoogieIcfgContainer [2021-11-19 14:15:30,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:15:30,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:15:30,764 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:15:30,765 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:15:30,765 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:15:29" (3/4) ... [2021-11-19 14:15:30,768 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 14:15:30,836 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98dcaea5-447e-4cfe-8763-d79e7d912506/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 14:15:30,837 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:15:30,838 INFO L158 Benchmark]: Toolchain (without parser) took 2228.07ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 48.7MB in the beginning and 78.3MB in the end (delta: -29.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:15:30,839 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 83.9MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:15:30,840 INFO L158 Benchmark]: CACSL2BoogieTranslator took 683.15ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 48.5MB in the beginning and 83.3MB in the end (delta: -34.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 14:15:30,841 INFO L158 Benchmark]: Boogie Procedure Inliner took 101.28ms. Allocated memory is still 113.2MB. Free memory was 83.3MB in the beginning and 81.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:15:30,841 INFO L158 Benchmark]: Boogie Preprocessor took 37.62ms. Allocated memory is still 113.2MB. Free memory was 81.6MB in the beginning and 80.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:15:30,842 INFO L158 Benchmark]: RCFGBuilder took 464.51ms. Allocated memory is still 113.2MB. Free memory was 80.1MB in the beginning and 67.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:15:30,843 INFO L158 Benchmark]: TraceAbstraction took 860.09ms. Allocated memory is still 113.2MB. Free memory was 67.0MB in the beginning and 79.9MB in the end (delta: -12.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:15:30,843 INFO L158 Benchmark]: Witness Printer took 73.03ms. Allocated memory is still 113.2MB. Free memory was 79.9MB in the beginning and 78.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:15:30,850 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 83.9MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 683.15ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 48.5MB in the beginning and 83.3MB in the end (delta: -34.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 101.28ms. Allocated memory is still 113.2MB. Free memory was 83.3MB in the beginning and 81.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.62ms. Allocated memory is still 113.2MB. Free memory was 81.6MB in the beginning and 80.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 464.51ms. Allocated memory is still 113.2MB. Free memory was 80.1MB in the beginning and 67.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 860.09ms. Allocated memory is still 113.2MB. Free memory was 67.0MB in the beginning and 79.9MB in the end (delta: -12.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 73.03ms. Allocated memory is still 113.2MB. Free memory was 79.9MB in the beginning and 78.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 524]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int val; [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) [L517] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={2:0}, arr={2:0}, length=1] [L518] COND FALSE !(!arr) [L519] i=0 VAL [__builtin_alloca (length)={2:0}, arr={2:0}, i=0, length=1] [L519] COND TRUE i