./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs --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 4f7670ede459996daea4f0d5b6d4f8f7722cb2c07f35d54c8d0ca4957e40998d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:49:26,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:49:26,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:49:26,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:49:26,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:49:26,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:49:26,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:49:26,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:49:26,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:49:26,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:49:26,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:49:26,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:49:26,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:49:26,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:49:26,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:49:26,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:49:26,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:49:26,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:49:26,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:49:26,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:49:26,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:49:26,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:49:26,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:49:26,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:49:26,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:49:26,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:49:26,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:49:26,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:49:26,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:49:26,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:49:26,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:49:26,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:49:26,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:49:26,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:49:26,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:49:26,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:49:26,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:49:26,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:49:26,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:49:26,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:49:26,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:49:26,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:49:27,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:49:27,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:49:27,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:49:27,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:49:27,026 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:49:27,026 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:49:27,027 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:49:27,027 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:49:27,027 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:49:27,028 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:49:27,028 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:49:27,028 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:49:27,029 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:49:27,029 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:49:27,029 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:49:27,030 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:49:27,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:49:27,031 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:49:27,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:49:27,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:49:27,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:49:27,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:49:27,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:49:27,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:49:27,033 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:49:27,033 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:49:27,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:49:27,034 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:49:27,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:49:27,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:49:27,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:49:27,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:49:27,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:49:27,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:49:27,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:49:27,037 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:49:27,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:49:27,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:49:27,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:49:27,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:49:27,038 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_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7670ede459996daea4f0d5b6d4f8f7722cb2c07f35d54c8d0ca4957e40998d [2021-11-19 15:49:27,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:49:27,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:49:27,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:49:27,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:49:27,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:49:27,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-11-19 15:49:27,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/data/cddb7b58c/e2a63ba9d0ab41d58e6d4a602134e8f6/FLAGa3d06732d [2021-11-19 15:49:27,983 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:49:27,984 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-11-19 15:49:27,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/data/cddb7b58c/e2a63ba9d0ab41d58e6d4a602134e8f6/FLAGa3d06732d [2021-11-19 15:49:28,327 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/data/cddb7b58c/e2a63ba9d0ab41d58e6d4a602134e8f6 [2021-11-19 15:49:28,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:49:28,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:49:28,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:49:28,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:49:28,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:49:28,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1563d108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28, skipping insertion in model container [2021-11-19 15:49:28,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:49:28,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:49:28,614 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_221de459-31f9-4560-95cd-45356ee7f193/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-11-19 15:49:28,639 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:49:28,651 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:49:28,670 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_221de459-31f9-4560-95cd-45356ee7f193/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-11-19 15:49:28,677 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:49:28,698 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:49:28,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28 WrapperNode [2021-11-19 15:49:28,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:49:28,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:49:28,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:49:28,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:49:28,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,751 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2021-11-19 15:49:28,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:49:28,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:49:28,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:49:28,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:49:28,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:49:28,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:49:28,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:49:28,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:49:28,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (1/1) ... [2021-11-19 15:49:28,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:49:28,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:49:28,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:49:28,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:49:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:49:28,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 15:49:28,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:49:28,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:49:28,989 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:49:28,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:49:29,162 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:49:29,204 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:49:29,208 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:49:29,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:49:29 BoogieIcfgContainer [2021-11-19 15:49:29,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:49:29,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:49:29,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:49:29,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:49:29,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:49:28" (1/3) ... [2021-11-19 15:49:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a675ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:49:29, skipping insertion in model container [2021-11-19 15:49:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:28" (2/3) ... [2021-11-19 15:49:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a675ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:49:29, skipping insertion in model container [2021-11-19 15:49:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:49:29" (3/3) ... [2021-11-19 15:49:29,226 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2021-11-19 15:49:29,232 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:49:29,233 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:49:29,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:49:29,303 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 [2021-11-19 15:49:29,303 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:49:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 15:49:29,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:29,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 15:49:29,328 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 2067881, now seen corresponding path program 1 times [2021-11-19 15:49:29,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:29,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894920972] [2021-11-19 15:49:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:29,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:29,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:29,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894920972] [2021-11-19 15:49:29,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894920972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:29,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:29,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:49:29,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62944596] [2021-11-19 15:49:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:29,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:49:29,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:49:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:49:29,686 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:29,769 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-19 15:49:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:49:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-19 15:49:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:29,781 INFO L225 Difference]: With dead ends: 15 [2021-11-19 15:49:29,781 INFO L226 Difference]: Without dead ends: 6 [2021-11-19 15:49:29,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:49:29,805 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:29,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:49:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-19 15:49:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-19 15:49:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) 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) [2021-11-19 15:49:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-19 15:49:29,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-19 15:49:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:29,866 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-19 15:49:29,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-19 15:49:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 15:49:29,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:29,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 15:49:29,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 15:49:29,868 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash 64062952, now seen corresponding path program 1 times [2021-11-19 15:49:29,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:29,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000421370] [2021-11-19 15:49:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:29,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:30,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:30,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000421370] [2021-11-19 15:49:30,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000421370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:49:30,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867525036] [2021-11-19 15:49:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:30,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:49:30,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:49:30,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:49:30,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 15:49:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:49:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:30,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:30,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867525036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:49:30,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158302129] [2021-11-19 15:49:30,808 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-19 15:49:30,809 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 15:49:30,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 15:49:30,822 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 15:49:30,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 15:49:30,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:49:30,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-19 15:49:30,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:49:30,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-19 15:49:30,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:30,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:30,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:30,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:30,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:30,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:30,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:31,016 INFO L180 QuantifierPusher]: treesize reduction 10, result has 84.1 percent of original size [2021-11-19 15:49:31,026 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:49:31,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:49:31,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-19 15:49:31,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-19 15:49:31,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:31,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:31,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:31,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:31,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:31,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:49:31,125 INFO L180 QuantifierPusher]: treesize reduction 10, result has 83.3 percent of original size [2021-11-19 15:49:31,138 INFO L185 QuantifierPusher]: treesize reduction 8, result has 81.8 percent of original size 36 [2021-11-19 15:49:31,149 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 15:49:31,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 15:49:31,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:49:31,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-19 15:49:31,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228469252] [2021-11-19 15:49:31,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 15:49:31,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:49:31,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:31,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:49:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:49:31,386 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:31,646 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-11-19 15:49:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:49:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-19 15:49:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:31,649 INFO L225 Difference]: With dead ends: 14 [2021-11-19 15:49:31,649 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 15:49:31,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:49:31,651 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:31,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:49:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 15:49:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 15:49:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-19 15:49:31,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-19 15:49:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:31,661 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-19 15:49:31,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-19 15:49:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 15:49:31,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:31,663 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-19 15:49:31,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 15:49:31,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:49:31,888 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1492854121, now seen corresponding path program 2 times [2021-11-19 15:49:31,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:31,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995164440] [2021-11-19 15:49:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:31,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 15:49:31,936 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 15:49:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 15:49:31,991 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 15:49:31,991 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 15:49:31,993 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 15:49:31,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 15:49:32,000 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-19 15:49:32,003 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 15:49:32,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 03:49:32 BoogieIcfgContainer [2021-11-19 15:49:32,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 15:49:32,031 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 15:49:32,031 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 15:49:32,032 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 15:49:32,032 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:49:29" (3/4) ... [2021-11-19 15:49:32,035 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 15:49:32,078 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 15:49:32,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 15:49:32,079 INFO L158 Benchmark]: Toolchain (without parser) took 3745.11ms. Allocated memory was 96.5MB in the beginning and 130.0MB in the end (delta: 33.6MB). Free memory was 74.1MB in the beginning and 97.6MB in the end (delta: -23.6MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-11-19 15:49:32,080 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 96.5MB. Free memory was 69.5MB in the beginning and 69.4MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:49:32,080 INFO L158 Benchmark]: CACSL2BoogieTranslator took 359.05ms. Allocated memory is still 96.5MB. Free memory was 74.1MB in the beginning and 71.4MB in the end (delta: 2.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 15:49:32,081 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.38ms. Allocated memory is still 96.5MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 15:49:32,082 INFO L158 Benchmark]: Boogie Preprocessor took 49.35ms. Allocated memory is still 96.5MB. Free memory was 69.8MB in the beginning and 69.0MB in the end (delta: 790.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:49:32,082 INFO L158 Benchmark]: RCFGBuilder took 411.44ms. Allocated memory is still 96.5MB. Free memory was 68.8MB in the beginning and 59.1MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 15:49:32,083 INFO L158 Benchmark]: TraceAbstraction took 2812.89ms. Allocated memory was 96.5MB in the beginning and 130.0MB in the end (delta: 33.6MB). Free memory was 58.6MB in the beginning and 99.7MB in the end (delta: -41.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:49:32,083 INFO L158 Benchmark]: Witness Printer took 47.01ms. Allocated memory is still 130.0MB. Free memory was 99.7MB in the beginning and 97.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 15:49:32,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 96.5MB. Free memory was 69.5MB in the beginning and 69.4MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 359.05ms. Allocated memory is still 96.5MB. Free memory was 74.1MB in the beginning and 71.4MB in the end (delta: 2.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.38ms. Allocated memory is still 96.5MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.35ms. Allocated memory is still 96.5MB. Free memory was 69.8MB in the beginning and 69.0MB in the end (delta: 790.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 411.44ms. Allocated memory is still 96.5MB. Free memory was 68.8MB in the beginning and 59.1MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2812.89ms. Allocated memory was 96.5MB in the beginning and 130.0MB in the end (delta: 33.6MB). Free memory was 58.6MB in the beginning and 99.7MB in the end (delta: -41.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 47.01ms. Allocated memory is still 130.0MB. Free memory was 99.7MB in the beginning and 97.6MB in the end (delta: 2.1MB). 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: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ VAL [i=2, n=2, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ VAL [i=3, n=4, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ VAL [i=4, n=6, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ VAL [i=5, n=-10, n=4] [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38 IncrementalHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 4 mSDtfsCounter, 38 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 125 SizeOfPredicates, 5 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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! [2021-11-19 15:49:32,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_221de459-31f9-4560-95cd-45356ee7f193/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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