./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH --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 b074fce96d6429d22c86c96a12ef3525cb358d932fbb69fef81fea7f3a374149 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:10:57,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:10:57,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:10:57,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:10:57,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:10:57,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:10:57,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:10:57,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:10:57,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:10:57,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:10:57,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:10:57,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:10:57,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:10:57,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:10:57,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:10:57,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:10:57,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:10:57,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:10:57,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:10:57,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:10:57,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:10:57,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:10:57,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:10:57,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:10:57,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:10:57,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:10:57,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:10:57,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:10:57,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:10:57,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:10:57,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:10:57,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:10:57,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:10:57,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:10:57,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:10:57,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:10:57,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:10:57,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:10:57,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:10:57,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:10:57,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:10:57,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:10:57,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:10:57,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:10:57,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:10:57,465 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:10:57,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:10:57,465 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:10:57,465 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:10:57,466 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:10:57,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:10:57,466 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:10:57,466 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:10:57,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:10:57,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:10:57,467 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:10:57,467 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:10:57,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:10:57,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:10:57,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:10:57,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:10:57,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:10:57,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:10:57,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:10:57,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:10:57,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:10:57,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:10:57,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:10:57,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:10:57,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:10:57,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:10:57,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:10:57,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:10:57,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:10:57,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:10:57,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:10:57,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:10:57,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:10:57,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:10:57,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:10:57,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:10:57,473 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_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b074fce96d6429d22c86c96a12ef3525cb358d932fbb69fef81fea7f3a374149 [2021-11-03 05:10:57,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:10:57,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:10:57,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:10:57,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:10:57,782 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:10:57,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/eca-rers2012/Problem16_label51.c [2021-11-03 05:10:57,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/data/5a5bda9b9/a9192e67271045acbec10a5ff4243ac5/FLAG789d61560 [2021-11-03 05:10:58,509 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:10:58,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/sv-benchmarks/c/eca-rers2012/Problem16_label51.c [2021-11-03 05:10:58,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/data/5a5bda9b9/a9192e67271045acbec10a5ff4243ac5/FLAG789d61560 [2021-11-03 05:10:58,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/data/5a5bda9b9/a9192e67271045acbec10a5ff4243ac5 [2021-11-03 05:10:58,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:10:58,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:10:58,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:10:58,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:10:58,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:10:58,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:10:58" (1/1) ... [2021-11-03 05:10:58,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194e4e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:58, skipping insertion in model container [2021-11-03 05:10:58,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:10:58" (1/1) ... [2021-11-03 05:10:58,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:10:58,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:10:59,050 WARN L228 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_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/sv-benchmarks/c/eca-rers2012/Problem16_label51.c[1726,1739] [2021-11-03 05:10:59,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:10:59,582 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:10:59,602 WARN L228 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_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/sv-benchmarks/c/eca-rers2012/Problem16_label51.c[1726,1739] [2021-11-03 05:10:59,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:10:59,913 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:10:59,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59 WrapperNode [2021-11-03 05:10:59,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:10:59,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:10:59,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:10:59,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:10:59,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:10:59,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:11:00,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:11:00,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:11:00,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:11:00,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:11:00,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:11:00,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:11:00,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:11:00,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (1/1) ... [2021-11-03 05:11:00,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:11:00,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:11:00,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:11:00,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:11:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:11:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:11:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:11:00,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:12:01,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:12:01,216 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 05:12:01,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:12:01 BoogieIcfgContainer [2021-11-03 05:12:01,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:12:01,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:12:01,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:12:01,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:12:01,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:10:58" (1/3) ... [2021-11-03 05:12:01,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418486de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:12:01, skipping insertion in model container [2021-11-03 05:12:01,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:59" (2/3) ... [2021-11-03 05:12:01,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418486de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:12:01, skipping insertion in model container [2021-11-03 05:12:01,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:12:01" (3/3) ... [2021-11-03 05:12:01,229 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label51.c [2021-11-03 05:12:01,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:12:01,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:12:01,295 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:12:01,306 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 [2021-11-03 05:12:01,306 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:12:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) 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) [2021-11-03 05:12:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:12:01,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:01,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:12:01,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1759716666, now seen corresponding path program 1 times [2021-11-03 05:12:01,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:01,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062152593] [2021-11-03 05:12:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:01,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:01,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062152593] [2021-11-03 05:12:01,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062152593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:01,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:01,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:12:01,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887234955] [2021-11-03 05:12:01,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:01,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:01,623 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-03 05:12:01,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:01,767 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-03 05:12:01,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 [2021-11-03 05:12:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:01,780 INFO L225 Difference]: With dead ends: 23 [2021-11-03 05:12:01,780 INFO L226 Difference]: Without dead ends: 11 [2021-11-03 05:12:01,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-03 05:12:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-03 05:12:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2021-11-03 05:12:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-03 05:12:01,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2021-11-03 05:12:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:01,815 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-03 05:12:01,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-03 05:12:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-03 05:12:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 05:12:01,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:01,816 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-11-03 05:12:01,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:12:01,817 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash -602106947, now seen corresponding path program 1 times [2021-11-03 05:12:01,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:01,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429245778] [2021-11-03 05:12:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:01,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:02,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:02,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429245778] [2021-11-03 05:12:02,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429245778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:12:02,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981737171] [2021-11-03 05:12:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:02,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:12:02,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:12:02,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:12:02,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65339fe2-3fb3-4b8b-99e6-cba7ddf7486e/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:12:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:12:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:22,376 INFO L328 TraceCheckSpWp]: Computing backward predicates...