./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_fib-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_fib-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7 --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 da5783328d73eba8f05689c8b63c9b7f7c1c1eeab4600bb7173d3ddf64fb59e0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:35:29,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:35:29,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:35:29,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:35:29,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:35:29,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:35:29,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:35:29,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:35:29,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:35:29,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:35:29,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:35:29,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:35:29,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:35:29,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:35:29,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:35:29,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:35:29,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:35:29,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:35:29,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:35:30,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:35:30,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:35:30,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:35:30,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:35:30,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:35:30,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:35:30,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:35:30,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:35:30,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:35:30,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:35:30,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:35:30,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:35:30,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:35:30,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:35:30,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:35:30,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:35:30,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:35:30,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:35:30,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:35:30,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:35:30,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:35:30,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:35:30,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:35:30,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:35:30,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:35:30,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:35:30,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:35:30,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:35:30,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:35:30,094 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:35:30,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:35:30,094 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:35:30,094 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:35:30,095 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:35:30,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:35:30,096 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:35:30,096 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:35:30,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:35:30,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:35:30,097 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:35:30,097 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:35:30,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:35:30,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:35:30,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:35:30,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:35:30,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:35:30,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:35:30,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:35:30,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:35:30,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:35:30,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:35:30,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:35:30,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:35:30,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:35:30,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:35:30,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:35:30,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:35:30,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:35:30,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:35:30,103 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:35:30,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:35:30,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:35:30,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:35:30,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:35:30,105 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_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da5783328d73eba8f05689c8b63c9b7f7c1c1eeab4600bb7173d3ddf64fb59e0 [2021-11-25 19:35:30,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:35:30,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:35:30,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:35:30,385 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:35:30,386 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:35:30,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-pthread/cs_fib-1.i [2021-11-25 19:35:30,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/data/b1b698a33/dcae23396e5b4340a56b846539519faf/FLAGf91701f05 [2021-11-25 19:35:31,056 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:35:31,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/sv-benchmarks/c/seq-pthread/cs_fib-1.i [2021-11-25 19:35:31,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/data/b1b698a33/dcae23396e5b4340a56b846539519faf/FLAGf91701f05 [2021-11-25 19:35:31,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/data/b1b698a33/dcae23396e5b4340a56b846539519faf [2021-11-25 19:35:31,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:35:31,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:35:31,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:35:31,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:35:31,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:35:31,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:35:31" (1/1) ... [2021-11-25 19:35:31,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248ccf13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:31, skipping insertion in model container [2021-11-25 19:35:31,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:35:31" (1/1) ... [2021-11-25 19:35:31,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:35:31,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:35:31,776 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_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/sv-benchmarks/c/seq-pthread/cs_fib-1.i[23602,23615] [2021-11-25 19:35:31,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:35:31,904 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:35:31,936 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_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/sv-benchmarks/c/seq-pthread/cs_fib-1.i[23602,23615] [2021-11-25 19:35:32,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:35:32,153 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:35:32,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32 WrapperNode [2021-11-25 19:35:32,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:35:32,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:35:32,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:35:32,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:35:32,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,257 INFO L137 Inliner]: procedures = 144, calls = 352, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 671 [2021-11-25 19:35:32,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:35:32,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:35:32,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:35:32,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:35:32,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:35:32,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:35:32,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:35:32,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:35:32,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (1/1) ... [2021-11-25 19:35:32,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:35:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:32,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:35:32,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6dd98cb-f8ee-418f-a4c7-8e5def9d8949/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:35:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:35:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:35:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:35:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:35:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:35:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:35:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:35:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-11-25 19:35:32,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-11-25 19:35:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:35:32,456 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-25 19:35:32,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-25 19:35:32,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:35:32,456 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-11-25 19:35:32,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-11-25 19:35:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:35:32,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:35:32,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:35:32,638 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:35:32,640 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:35:33,040 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-11-25 19:35:33,041 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:35:33,041 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-11-25 19:35:33,041 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:35:33,043 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L734: SUMMARY for call __CS_cs(); srcloc: null [2021-11-25 19:35:33,044 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L734-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-11-25 19:35:33,044 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L734-1: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:35:36,547 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:35:36,742 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:35:36,742 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 19:35:36,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:35:36 BoogieIcfgContainer [2021-11-25 19:35:36,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:35:36,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:35:36,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:35:36,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:35:36,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:35:31" (1/3) ... [2021-11-25 19:35:36,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329b44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:35:36, skipping insertion in model container [2021-11-25 19:35:36,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:35:32" (2/3) ... [2021-11-25 19:35:36,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329b44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:35:36, skipping insertion in model container [2021-11-25 19:35:36,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:35:36" (3/3) ... [2021-11-25 19:35:36,758 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_fib-1.i [2021-11-25 19:35:36,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:35:36,768 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:35:36,853 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:35:36,871 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 [2021-11-25 19:35:36,883 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:35:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 84 states have (on average 1.25) internal successors, (105), 85 states have internal predecessors, (105), 59 states have call successors, (59), 4 states have call predecessors, (59), 4 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2021-11-25 19:35:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-25 19:35:36,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:36,931 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:35:36,931 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2107347193, now seen corresponding path program 1 times [2021-11-25 19:35:36,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:35:36,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381340709] [2021-11-25 19:35:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:35:36,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms