./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test22-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test22-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P --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 0ac3f9dde39c1c30daf84e7d2d3f68c4363e658cdbd9aae18974f8ff3d9b4fc7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:11:26,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:11:26,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:11:26,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:11:26,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:11:26,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:11:26,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:11:26,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:11:26,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:11:26,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:11:26,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:11:26,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:11:26,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:11:26,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:11:26,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:11:26,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:11:26,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:11:26,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:11:26,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:11:26,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:11:26,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:11:26,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:11:26,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:11:26,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:11:26,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:11:26,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:11:26,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:11:26,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:11:26,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:11:26,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:11:26,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:11:26,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:11:26,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:11:26,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:11:26,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:11:26,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:11:26,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:11:26,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:11:26,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:11:26,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:11:26,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:11:26,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:11:26,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:11:26,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:11:26,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:11:26,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:11:26,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:11:26,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:11:26,399 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:11:26,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:11:26,400 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:11:26,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:11:26,401 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:11:26,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:11:26,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:11:26,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:11:26,402 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:11:26,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:11:26,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:11:26,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:11:26,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:11:26,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:11:26,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:11:26,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:11:26,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:11:26,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:11:26,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:11:26,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:11:26,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:11:26,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:11:26,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:11:26,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:11:26,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:11:26,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:11:26,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:11:26,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:11:26,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:11:26,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:11:26,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:11:26,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:11:26,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:11:26,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:11:26,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:11:26,413 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_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ac3f9dde39c1c30daf84e7d2d3f68c4363e658cdbd9aae18974f8ff3d9b4fc7 [2021-11-21 01:11:26,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:11:26,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:11:26,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:11:26,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:11:26,757 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:11:26,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-regression/test22-2.c [2021-11-21 01:11:26,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/data/145ee13cf/34ee56cb287b4588ace76ad6730b36a3/FLAG6ce044caf [2021-11-21 01:11:27,365 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:11:27,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/sv-benchmarks/c/ldv-regression/test22-2.c [2021-11-21 01:11:27,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/data/145ee13cf/34ee56cb287b4588ace76ad6730b36a3/FLAG6ce044caf [2021-11-21 01:11:27,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/data/145ee13cf/34ee56cb287b4588ace76ad6730b36a3 [2021-11-21 01:11:27,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:11:27,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:11:27,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:11:27,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:11:27,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:11:27,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d84b8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:27, skipping insertion in model container [2021-11-21 01:11:27,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:11:27" (1/1) ... [2021-11-21 01:11:27,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:11:27,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:11:27,950 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_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/sv-benchmarks/c/ldv-regression/test22-2.c[1029,1042] [2021-11-21 01:11:27,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:11:27,979 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:11:28,017 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_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/sv-benchmarks/c/ldv-regression/test22-2.c[1029,1042] [2021-11-21 01:11:28,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:11:28,041 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:11:28,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28 WrapperNode [2021-11-21 01:11:28,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:11:28,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:11:28,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:11:28,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:11:28,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,117 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 85 [2021-11-21 01:11:28,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:11:28,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:11:28,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:11:28,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:11:28,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:11:28,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:11:28,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:11:28,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:11:28,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (1/1) ... [2021-11-21 01:11:28,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:11:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:11:28,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:11:28,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:11:28,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:11:28,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:11:28,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:11:28,283 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2021-11-21 01:11:28,283 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2021-11-21 01:11:28,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:11:28,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:11:28,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:11:28,397 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:11:28,399 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:11:28,580 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:11:28,652 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:11:28,653 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:11:28,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:11:28 BoogieIcfgContainer [2021-11-21 01:11:28,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:11:28,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:11:28,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:11:28,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:11:28,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:11:27" (1/3) ... [2021-11-21 01:11:28,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fd2e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:11:28, skipping insertion in model container [2021-11-21 01:11:28,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:28" (2/3) ... [2021-11-21 01:11:28,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fd2e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:11:28, skipping insertion in model container [2021-11-21 01:11:28,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:11:28" (3/3) ... [2021-11-21 01:11:28,665 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-2.c [2021-11-21 01:11:28,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:11:28,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:11:28,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:11:28,738 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 [2021-11-21 01:11:28,738 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:11:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:11:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:11:28,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:28,773 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:28,774 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash -469408496, now seen corresponding path program 1 times [2021-11-21 01:11:28,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:28,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332182918] [2021-11-21 01:11:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:28,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:11:29,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:29,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332182918] [2021-11-21 01:11:29,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332182918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:29,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:29,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:11:29,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626423585] [2021-11-21 01:11:29,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:29,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:11:29,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:11:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:11:29,096 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:11:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:29,138 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-21 01:11:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:11:29,148 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2021-11-21 01:11:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:29,162 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:11:29,163 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:11:29,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:11:29,171 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:29,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:11:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:11:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-21 01:11:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:11:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-21 01:11:29,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 18 [2021-11-21 01:11:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:29,216 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-21 01:11:29,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:11:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-21 01:11:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:11:29,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:29,219 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:29,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:11:29,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1674130630, now seen corresponding path program 1 times [2021-11-21 01:11:29,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:29,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185686091] [2021-11-21 01:11:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:29,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:11:29,342 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:11:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:11:29,454 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:11:29,454 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:11:29,456 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:11:29,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:11:29,463 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-21 01:11:29,466 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:11:29,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:11:29 BoogieIcfgContainer [2021-11-21 01:11:29,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:11:29,509 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:11:29,510 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:11:29,510 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:11:29,510 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:11:28" (3/4) ... [2021-11-21 01:11:29,513 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 01:11:29,582 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:11:29,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:11:29,583 INFO L158 Benchmark]: Toolchain (without parser) took 1863.56ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 82.4MB in the beginning and 106.5MB in the end (delta: -24.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-11-21 01:11:29,584 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 113.2MB. Free memory is still 67.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:11:29,585 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.22ms. Allocated memory is still 113.2MB. Free memory was 82.1MB in the beginning and 87.0MB in the end (delta: -4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 01:11:29,585 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.30ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 85.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:11:29,586 INFO L158 Benchmark]: Boogie Preprocessor took 58.21ms. Allocated memory is still 113.2MB. Free memory was 85.3MB in the beginning and 84.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:11:29,587 INFO L158 Benchmark]: RCFGBuilder took 477.34ms. Allocated memory is still 113.2MB. Free memory was 84.0MB in the beginning and 71.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 01:11:29,588 INFO L158 Benchmark]: TraceAbstraction took 850.89ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 71.0MB in the beginning and 108.6MB in the end (delta: -37.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:11:29,588 INFO L158 Benchmark]: Witness Printer took 72.86ms. Allocated memory is still 146.8MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:11:29,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 113.2MB. Free memory is still 67.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.22ms. Allocated memory is still 113.2MB. Free memory was 82.1MB in the beginning and 87.0MB in the end (delta: -4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.30ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 85.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 58.21ms. Allocated memory is still 113.2MB. Free memory was 85.3MB in the beginning and 84.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 477.34ms. Allocated memory is still 113.2MB. Free memory was 84.0MB in the beginning and 71.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 850.89ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 71.0MB in the beginning and 108.6MB in the end (delta: -37.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 72.86ms. Allocated memory is still 146.8MB. Free memory was 108.6MB in the beginning and 106.5MB 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: 50]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] struct dummy d1, d2; [L34] CALL init() [L15] d1.a = __VERIFIER_nondet_int() [L16] d1.b = __VERIFIER_nondet_int() [L18] d2.a = __VERIFIER_nondet_int() [L19] d2.b = __VERIFIER_nondet_int() [L34] RET init() [L35] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}, pd1={4:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={5:0}, pd1={4:0}, pd2={4:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L36] int i = __VERIFIER_nondet_int(); [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L37] EXPR (*pd2).a [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [(*pd2).a=6, d1={4:0}, d2={5:0}, i=-3, pd1={4:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={4:0}, pd3={5:0}] [L37] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L38] int *pa = &pd1->a; [L39] EXPR pd3->a [L39] i = pd3->a - 10 [L40] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=7, pa={4:0}, pd1={4:0}, pd2={4:0}, pd3={5:0}] [L40] COND FALSE !(i < *pa) [L43] CALL, EXPR check(pd2, i) [L29] EXPR s1->a [L29] return s1->a == i; [L43] RET, EXPR check(pd2, i) [L43] COND TRUE !check(pd2, i) [L50] reach_error() VAL [d1={4:0}, d2={5:0}, i=7, pa={4:0}, pd1={4:0}, pd2={4:0}, pd3={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 17 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 17 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 6/6 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! [2021-11-21 01:11:29,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_020f3f1c-13a2-4e5b-bdcf-2758cf56e08d/bin/utaipan-TEXQjIfE4P/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