./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/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 0.2.0-7b2dab5 [2020-12-09 04:38:01,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:38:01,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:38:01,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:38:01,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:38:01,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:38:01,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:38:01,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:38:01,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:38:01,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:38:01,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:38:01,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:38:01,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:38:01,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:38:01,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:38:01,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:38:01,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:38:01,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:38:01,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:38:01,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:38:01,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:38:01,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:38:01,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:38:01,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:38:01,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:38:01,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:38:01,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:38:01,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:38:01,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:38:01,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:38:01,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:38:01,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:38:01,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:38:01,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:38:01,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:38:01,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:38:01,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:38:01,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:38:01,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:38:01,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:38:01,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:38:01,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 04:38:01,900 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:38:01,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:38:01,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:38:01,901 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:38:01,901 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:38:01,901 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:38:01,902 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:38:01,902 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:38:01,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:38:01,902 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:38:01,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:38:01,902 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:38:01,903 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:38:01,903 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:38:01,903 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:38:01,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 04:38:01,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 04:38:01,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:38:01,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:38:01,904 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 04:38:01,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:38:01,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:38:01,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:38:01,905 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 04:38:01,905 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 04:38:01,905 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 04:38:01,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:38:01,906 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:38:01,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:38:01,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:38:01,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:38:01,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:38:01,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:38:01,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:38:01,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:38:01,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:38:01,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:38:01,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:38:01,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:38:01,908 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_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2020-12-09 04:38:02,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:38:02,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:38:02,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:38:02,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:38:02,096 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:38:02,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-12-09 04:38:02,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/data/ade8ec5fd/062f64aa196146b1a040e682dc15056c/FLAG71f08c681 [2020-12-09 04:38:02,535 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:38:02,536 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-12-09 04:38:02,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/data/ade8ec5fd/062f64aa196146b1a040e682dc15056c/FLAG71f08c681 [2020-12-09 04:38:02,557 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/data/ade8ec5fd/062f64aa196146b1a040e682dc15056c [2020-12-09 04:38:02,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:38:02,559 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:38:02,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:38:02,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:38:02,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:38:02,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea11937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02, skipping insertion in model container [2020-12-09 04:38:02,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:38:02,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:38:02,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:38:02,785 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:38:02,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:38:02,843 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:38:02,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02 WrapperNode [2020-12-09 04:38:02,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:38:02,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:38:02,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:38:02,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:38:02,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:38:02,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:38:02,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:38:02,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:38:02,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... [2020-12-09 04:38:02,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:38:02,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:38:02,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:38:02,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:38:02,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:38:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 04:38:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 04:38:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:38:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 04:38:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:38:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:38:03,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:38:03,331 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 04:38:03,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:38:03 BoogieIcfgContainer [2020-12-09 04:38:03,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:38:03,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:38:03,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:38:03,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:38:03,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:38:02" (1/3) ... [2020-12-09 04:38:03,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61320bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:38:03, skipping insertion in model container [2020-12-09 04:38:03,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:38:02" (2/3) ... [2020-12-09 04:38:03,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61320bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:38:03, skipping insertion in model container [2020-12-09 04:38:03,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:38:03" (3/3) ... [2020-12-09 04:38:03,342 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2020-12-09 04:38:03,355 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:38:03,357 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-12-09 04:38:03,365 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-12-09 04:38:03,382 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:38:03,383 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 04:38:03,383 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:38:03,383 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:38:03,383 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:38:03,383 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:38:03,383 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:38:03,383 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:38:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-09 04:38:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 04:38:03,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:38:03,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 04:38:03,400 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]=== [2020-12-09 04:38:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:38:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash 157381, now seen corresponding path program 1 times [2020-12-09 04:38:03,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:38:03,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183145093] [2020-12-09 04:38:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:38:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:38:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:03,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183145093] [2020-12-09 04:38:03,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:38:03,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 04:38:03,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794116597] [2020-12-09 04:38:03,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:38:03,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:38:03,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:38:03,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:38:03,534 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-12-09 04:38:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:38:03,577 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-09 04:38:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:38:03,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 04:38:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:38:03,584 INFO L225 Difference]: With dead ends: 39 [2020-12-09 04:38:03,584 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 04:38:03,585 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 [2020-12-09 04:38:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 04:38:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-09 04:38:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 04:38:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-09 04:38:03,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 3 [2020-12-09 04:38:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:38:03,608 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-09 04:38:03,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:38:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-09 04:38:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 04:38:03,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:38:03,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 04:38:03,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:38:03,609 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]=== [2020-12-09 04:38:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:38:03,610 INFO L82 PathProgramCache]: Analyzing trace with hash 157382, now seen corresponding path program 1 times [2020-12-09 04:38:03,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:38:03,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052637999] [2020-12-09 04:38:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:38:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:38:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:03,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052637999] [2020-12-09 04:38:03,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:38:03,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:38:03,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591154503] [2020-12-09 04:38:03,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:38:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:38:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:38:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:38:03,659 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 4 states. [2020-12-09 04:38:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:38:03,719 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-09 04:38:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:38:03,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-09 04:38:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:38:03,720 INFO L225 Difference]: With dead ends: 40 [2020-12-09 04:38:03,720 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 04:38:03,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:38:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 04:38:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 04:38:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 04:38:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-12-09 04:38:03,725 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 3 [2020-12-09 04:38:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:38:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-12-09 04:38:03,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:38:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-12-09 04:38:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 04:38:03,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:38:03,726 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 04:38:03,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 04:38:03,726 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]=== [2020-12-09 04:38:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:38:03,727 INFO L82 PathProgramCache]: Analyzing trace with hash 151338058, now seen corresponding path program 1 times [2020-12-09 04:38:03,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:38:03,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648197661] [2020-12-09 04:38:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:38:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:38:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648197661] [2020-12-09 04:38:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309653869] [2020-12-09 04:38:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:38:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:38:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:38:03,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:38:03,878 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-12-09 04:38:03,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 04:38:03,884 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 04:38:03,885 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 04:38:03,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2020-12-09 04:38:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:03,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:38:03,964 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 04:38:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:03,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431468381] [2020-12-09 04:38:04,009 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 04:38:04,009 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:38:04,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:38:04,016 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:38:04,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:38:04,370 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:38:04,580 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:38:04,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:38:04,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2020-12-09 04:38:04,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207975575] [2020-12-09 04:38:04,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 04:38:04,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:38:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 04:38:04,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-09 04:38:04,582 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2020-12-09 04:38:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:38:04,711 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-09 04:38:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:38:04,712 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2020-12-09 04:38:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:38:04,712 INFO L225 Difference]: With dead ends: 39 [2020-12-09 04:38:04,712 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 04:38:04,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-12-09 04:38:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 04:38:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-09 04:38:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 04:38:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-09 04:38:04,716 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 5 [2020-12-09 04:38:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:38:04,716 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-09 04:38:04,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 04:38:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-09 04:38:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 04:38:04,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:38:04,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 04:38:04,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 04:38:04,917 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]=== [2020-12-09 04:38:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:38:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash 396616665, now seen corresponding path program 1 times [2020-12-09 04:38:04,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:38:04,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815239039] [2020-12-09 04:38:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:38:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:38:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:04,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815239039] [2020-12-09 04:38:04,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492615190] [2020-12-09 04:38:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:38:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:38:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:38:04,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:38:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:05,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:38:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:38:05,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810688015] [2020-12-09 04:38:05,035 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 04:38:05,036 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:38:05,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:38:05,036 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:38:05,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:38:05,355 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:38:05,506 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-12-09 04:38:05,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:38:05,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4, 4] total 11 [2020-12-09 04:38:05,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100749431] [2020-12-09 04:38:05,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:38:05,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:38:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:38:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:38:05,674 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2020-12-09 04:38:05,813 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-12-09 04:38:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:38:05,968 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-12-09 04:38:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:38:05,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 04:38:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:38:05,970 INFO L225 Difference]: With dead ends: 73 [2020-12-09 04:38:05,970 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 04:38:05,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 04:38:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 04:38:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2020-12-09 04:38:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 04:38:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-09 04:38:05,974 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2020-12-09 04:38:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:38:05,975 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-09 04:38:05,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:38:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-09 04:38:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 04:38:05,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:38:05,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:38:06,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:38:06,177 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]=== [2020-12-09 04:38:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:38:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2120707428, now seen corresponding path program 1 times [2020-12-09 04:38:06,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:38:06,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447642222] [2020-12-09 04:38:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:38:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:38:06,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:38:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:38:06,240 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:38:06,251 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 04:38:06,252 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:38:06,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-12-09 04:38:06,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:38:06 BoogieIcfgContainer [2020-12-09 04:38:06,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:38:06,267 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:38:06,267 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:38:06,267 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:38:06,267 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:38:03" (3/4) ... [2020-12-09 04:38:06,268 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:38:06,292 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0cb20e4a-2632-4b62-a5ca-f37d5954e08b/bin/utaipan/witness.graphml [2020-12-09 04:38:06,292 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:38:06,293 INFO L168 Benchmark]: Toolchain (without parser) took 3732.95 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 63.4 MB in the beginning and 82.9 MB in the end (delta: -19.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:38:06,293 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 102.8 MB. Free memory is still 80.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:38:06,293 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.82 ms. Allocated memory is still 102.8 MB. Free memory was 63.2 MB in the beginning and 69.0 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:38:06,294 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 102.8 MB. Free memory was 69.0 MB in the beginning and 66.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:38:06,294 INFO L168 Benchmark]: Boogie Preprocessor took 19.58 ms. Allocated memory is still 102.8 MB. Free memory was 66.9 MB in the beginning and 65.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:38:06,295 INFO L168 Benchmark]: RCFGBuilder took 439.30 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 65.6 MB in the beginning and 91.0 MB in the end (delta: -25.5 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:38:06,295 INFO L168 Benchmark]: TraceAbstraction took 2931.08 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 90.3 MB in the beginning and 85.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:38:06,295 INFO L168 Benchmark]: Witness Printer took 25.29 ms. Allocated memory is still 148.9 MB. Free memory was 85.0 MB in the beginning and 82.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:38:06,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 102.8 MB. Free memory is still 80.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.82 ms. Allocated memory is still 102.8 MB. Free memory was 63.2 MB in the beginning and 69.0 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 102.8 MB. Free memory was 69.0 MB in the beginning and 66.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.58 ms. Allocated memory is still 102.8 MB. Free memory was 66.9 MB in the beginning and 65.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 439.30 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 65.6 MB in the beginning and 91.0 MB in the end (delta: -25.5 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2931.08 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 90.3 MB in the beginning and 85.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. * Witness Printer took 25.29 ms. Allocated memory is still 148.9 MB. Free memory was 85.0 MB in the beginning and 82.9 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