./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test26-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test26-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5617f713954d7209d6b7210dc855bccb3ec884121999fe1b009aa3de39a1bff --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:33:32,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:33:32,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:33:32,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:33:32,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:33:32,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:33:32,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:33:32,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:33:32,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:33:32,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:33:32,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:33:32,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:33:32,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:33:32,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:33:32,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:33:32,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:33:32,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:33:32,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:33:32,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:33:32,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:33:32,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:33:32,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:33:32,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:33:32,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:33:32,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:33:32,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:33:32,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:33:32,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:33:32,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:33:32,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:33:32,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:33:32,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:33:32,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:33:33,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:33:33,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:33:33,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:33:33,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:33:33,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:33:33,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:33:33,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:33:33,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:33:33,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:33:33,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:33:33,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:33:33,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:33:33,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:33:33,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:33:33,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:33:33,067 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:33:33,067 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:33:33,068 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:33:33,068 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:33:33,069 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:33:33,069 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:33:33,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:33:33,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:33:33,070 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:33:33,071 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:33:33,071 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:33:33,071 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:33:33,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:33:33,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:33:33,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:33:33,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:33:33,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:33:33,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:33:33,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:33:33,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:33:33,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:33:33,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:33:33,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:33:33,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:33:33,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:33:33,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:33:33,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:33:33,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:33:33,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:33:33,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:33:33,079 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:33:33,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:33:33,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:33:33,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:33:33,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:33:33,080 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_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5617f713954d7209d6b7210dc855bccb3ec884121999fe1b009aa3de39a1bff [2021-11-23 17:33:33,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:33:33,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:33:33,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:33:33,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:33:33,497 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:33:33,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/ldv-regression/test26-2.c [2021-11-23 17:33:33,591 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/data/ebb7b2ee7/3c1e9546276841638c65421bf9f65bb5/FLAG7c4076934 [2021-11-23 17:33:34,219 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:33:34,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/sv-benchmarks/c/ldv-regression/test26-2.c [2021-11-23 17:33:34,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/data/ebb7b2ee7/3c1e9546276841638c65421bf9f65bb5/FLAG7c4076934 [2021-11-23 17:33:34,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/data/ebb7b2ee7/3c1e9546276841638c65421bf9f65bb5 [2021-11-23 17:33:34,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:33:34,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:33:34,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:33:34,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:33:34,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:33:34,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:34,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e5ff8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34, skipping insertion in model container [2021-11-23 17:33:34,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:34,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:33:34,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:33:34,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/sv-benchmarks/c/ldv-regression/test26-2.c[493,506] [2021-11-23 17:33:34,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:33:34,916 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:33:34,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/sv-benchmarks/c/ldv-regression/test26-2.c[493,506] [2021-11-23 17:33:34,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:33:34,955 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:33:34,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34 WrapperNode [2021-11-23 17:33:34,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:33:34,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:33:34,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:33:34,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:33:34,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:34,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,004 INFO L137 Inliner]: procedures = 12, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2021-11-23 17:33:35,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:33:35,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:33:35,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:33:35,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:33:35,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:33:35,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:33:35,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:33:35,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:33:35,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (1/1) ... [2021-11-23 17:33:35,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:33:35,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:35,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:33:35,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:33:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:33:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:33:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:33:35,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:33:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:33:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:33:35,241 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:33:35,243 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:33:35,403 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:33:35,432 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:33:35,432 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:33:35,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:33:35 BoogieIcfgContainer [2021-11-23 17:33:35,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:33:35,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:33:35,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:33:35,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:33:35,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:33:34" (1/3) ... [2021-11-23 17:33:35,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:33:35, skipping insertion in model container [2021-11-23 17:33:35,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:33:34" (2/3) ... [2021-11-23 17:33:35,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:33:35, skipping insertion in model container [2021-11-23 17:33:35,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:33:35" (3/3) ... [2021-11-23 17:33:35,452 INFO L111 eAbstractionObserver]: Analyzing ICFG test26-2.c [2021-11-23 17:33:35,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:33:35,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:33:35,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:33:35,549 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-23 17:33:35,549 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:33:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-23 17:33:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 17:33:35,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:35,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 17:33:35,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:35,597 INFO L85 PathProgramCache]: Analyzing trace with hash 46356, now seen corresponding path program 1 times [2021-11-23 17:33:35,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 17:33:35,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180314237] [2021-11-23 17:33:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:35,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 17:33:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 17:33:35,790 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 17:33:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 17:33:35,864 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 17:33:35,866 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 17:33:35,868 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 17:33:35,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 17:33:35,876 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 17:33:35,880 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 17:33:35,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 05:33:35 BoogieIcfgContainer [2021-11-23 17:33:35,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 17:33:35,917 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 17:33:35,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 17:33:35,918 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 17:33:35,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:33:35" (3/4) ... [2021-11-23 17:33:35,921 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 17:33:35,977 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/witness.graphml [2021-11-23 17:33:35,978 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 17:33:35,979 INFO L158 Benchmark]: Toolchain (without parser) took 1386.94ms. Allocated memory is still 98.6MB. Free memory was 56.1MB in the beginning and 45.6MB in the end (delta: 10.5MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2021-11-23 17:33:35,983 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 72.0MB in the end (delta: 51.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:33:35,987 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.31ms. Allocated memory is still 98.6MB. Free memory was 55.9MB in the beginning and 73.3MB in the end (delta: -17.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 17:33:35,987 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.28ms. Allocated memory is still 98.6MB. Free memory was 73.3MB in the beginning and 71.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:33:35,989 INFO L158 Benchmark]: Boogie Preprocessor took 43.62ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 70.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:33:35,989 INFO L158 Benchmark]: RCFGBuilder took 391.60ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 61.4MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:33:35,990 INFO L158 Benchmark]: TraceAbstraction took 470.44ms. Allocated memory is still 98.6MB. Free memory was 60.8MB in the beginning and 47.4MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:33:35,991 INFO L158 Benchmark]: Witness Printer took 60.34ms. Allocated memory is still 98.6MB. Free memory was 47.4MB in the beginning and 45.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:33:35,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 72.0MB in the end (delta: 51.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.31ms. Allocated memory is still 98.6MB. Free memory was 55.9MB in the beginning and 73.3MB in the end (delta: -17.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.28ms. Allocated memory is still 98.6MB. Free memory was 73.3MB in the beginning and 71.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.62ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 70.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 391.60ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 61.4MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 470.44ms. Allocated memory is still 98.6MB. Free memory was 60.8MB in the beginning and 47.4MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 60.34ms. Allocated memory is still 98.6MB. Free memory was 47.4MB in the beginning and 45.8MB in the end (delta: 1.5MB). 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: 26]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L5-L7] struct dummy { int a, b; } global = {0, 1}; [L16] struct dummy *pd = &global; [L18] CALL assign(&pd->b, &pd->b) [L11] EXPR \read(*pb) [L11] *pa = *pb [L18] RET assign(&pd->b, &pd->b) [L20] EXPR pd->a [L20] EXPR global.b VAL [global={4:0}, global.b=1, pd={4:0}, pd->a=0] [L20] COND TRUE pd->a != global.b [L26] reach_error() VAL [global={4:0}, pd={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 17:33:36,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d15c538-6e71-4ea3-ace3-3142418ca468/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE