./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o3.c --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_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 862de3da7324bf897583f86d3cb756f668fc7c871c8791ecf46f087893ee7b09 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:00:40,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:00:40,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:00:40,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:00:40,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:00:40,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:00:40,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:00:40,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:00:40,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:00:40,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:00:40,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:00:40,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:00:40,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:00:40,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:00:40,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:00:40,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:00:40,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:00:40,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:00:40,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:00:40,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:00:40,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:00:40,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:00:40,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:00:40,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:00:40,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:00:40,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:00:40,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:00:40,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:00:40,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:00:40,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:00:40,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:00:40,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:00:40,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:00:40,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:00:40,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:00:40,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:00:40,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:00:40,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:00:40,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:00:40,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:00:40,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:00:40,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:00:40,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:00:40,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:00:40,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:00:40,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:00:40,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:00:40,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:00:40,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:00:40,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:00:40,286 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:00:40,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:00:40,286 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:00:40,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:00:40,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:00:40,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:00:40,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:00:40,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:00:40,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:00:40,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:00:40,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:00:40,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:00:40,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:00:40,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:00:40,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:00:40,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:00:40,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:00:40,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:00:40,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:00:40,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:00:40,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:00:40,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:00:40,289 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:00:40,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:00:40,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:00:40,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:00:40,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 862de3da7324bf897583f86d3cb756f668fc7c871c8791ecf46f087893ee7b09 [2021-12-06 18:00:40,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:00:40,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:00:40,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:00:40,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:00:40,489 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:00:40,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive-simple/id_o3.c [2021-12-06 18:00:40,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/data/826201adf/9697f16d433042a3a9cb1fc3b18c7332/FLAG1e8417e09 [2021-12-06 18:00:40,895 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:00:40,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/sv-benchmarks/c/recursive-simple/id_o3.c [2021-12-06 18:00:40,900 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/data/826201adf/9697f16d433042a3a9cb1fc3b18c7332/FLAG1e8417e09 [2021-12-06 18:00:40,911 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/data/826201adf/9697f16d433042a3a9cb1fc3b18c7332 [2021-12-06 18:00:40,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:00:40,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:00:40,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:00:40,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:00:40,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:00:40,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:00:40" (1/1) ... [2021-12-06 18:00:40,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a241dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:40, skipping insertion in model container [2021-12-06 18:00:40,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:00:40" (1/1) ... [2021-12-06 18:00:40,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:00:40,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:00:41,042 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_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/sv-benchmarks/c/recursive-simple/id_o3.c[514,527] [2021-12-06 18:00:41,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:00:41,053 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:00:41,065 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_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/sv-benchmarks/c/recursive-simple/id_o3.c[514,527] [2021-12-06 18:00:41,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:00:41,075 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:00:41,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41 WrapperNode [2021-12-06 18:00:41,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:00:41,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:00:41,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:00:41,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:00:41,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,103 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2021-12-06 18:00:41,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:00:41,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:00:41,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:00:41,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:00:41,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:00:41,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:00:41,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:00:41,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:00:41,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (1/1) ... [2021-12-06 18:00:41,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:00:41,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:41,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:00:41,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:00:41,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:00:41,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:00:41,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:00:41,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:00:41,187 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-12-06 18:00:41,188 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-12-06 18:00:41,238 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:00:41,240 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:00:41,299 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:00:41,305 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:00:41,305 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 18:00:41,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:00:41 BoogieIcfgContainer [2021-12-06 18:00:41,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:00:41,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:00:41,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:00:41,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:00:41,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:00:40" (1/3) ... [2021-12-06 18:00:41,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be734f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:00:41, skipping insertion in model container [2021-12-06 18:00:41,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:41" (2/3) ... [2021-12-06 18:00:41,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be734f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:00:41, skipping insertion in model container [2021-12-06 18:00:41,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:00:41" (3/3) ... [2021-12-06 18:00:41,315 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o3.c [2021-12-06 18:00:41,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:00:41,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:00:41,359 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:00:41,364 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=PETRI_NET, 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 [2021-12-06 18:00:41,364 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:00:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:00:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:00:41,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:41,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:41,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-12-06 18:00:41,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:41,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341713323] [2021-12-06 18:00:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:41,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:41,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:00:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:41,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341713323] [2021-12-06 18:00:41,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341713323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:41,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:41,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:00:41,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189215546] [2021-12-06 18:00:41,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:41,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:00:41,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:00:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:00:41,578 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:00:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:41,605 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-06 18:00:41,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:00:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-06 18:00:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:41,613 INFO L225 Difference]: With dead ends: 28 [2021-12-06 18:00:41,613 INFO L226 Difference]: Without dead ends: 15 [2021-12-06 18:00:41,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:00:41,619 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:41,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:00:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-06 18:00:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-06 18:00:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:00:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-06 18:00:41,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-12-06 18:00:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:41,647 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-06 18:00:41,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:00:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-06 18:00:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:00:41,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:41,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:41,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:00:41,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-12-06 18:00:41,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:41,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924848123] [2021-12-06 18:00:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:41,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:41,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:00:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:41,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:00:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:00:41,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:41,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924848123] [2021-12-06 18:00:41,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924848123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:41,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341751913] [2021-12-06 18:00:41,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:41,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:41,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:41,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:41,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:00:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:00:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:00:41,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:00:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341751913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:41,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:41,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-06 18:00:41,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541315700] [2021-12-06 18:00:41,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:41,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:00:41,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:00:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:00:41,988 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 18:00:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:42,021 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-12-06 18:00:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:00:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2021-12-06 18:00:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:42,022 INFO L225 Difference]: With dead ends: 27 [2021-12-06 18:00:42,022 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 18:00:42,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:00:42,024 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:42,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:00:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 18:00:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 18:00:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:00:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-06 18:00:42,030 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-12-06 18:00:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:42,030 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-06 18:00:42,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 18:00:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-06 18:00:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:00:42,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:42,031 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:42,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:00:42,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:42,234 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2021-12-06 18:00:42,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:42,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017232884] [2021-12-06 18:00:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:42,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:00:42,327 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 18:00:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:00:42,398 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 18:00:42,399 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 18:00:42,400 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 18:00:42,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:00:42,404 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-12-06 18:00:42,407 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 18:00:42,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 06:00:42 BoogieIcfgContainer [2021-12-06 18:00:42,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 18:00:42,427 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 18:00:42,427 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 18:00:42,427 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 18:00:42,428 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:00:41" (3/4) ... [2021-12-06 18:00:42,429 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 18:00:42,457 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 18:00:42,457 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 18:00:42,457 INFO L158 Benchmark]: Toolchain (without parser) took 1542.47ms. Allocated memory is still 159.4MB. Free memory was 117.7MB in the beginning and 62.1MB in the end (delta: 55.6MB). Peak memory consumption was 52.1MB. Max. memory is 16.1GB. [2021-12-06 18:00:42,458 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 159.4MB. Free memory is still 134.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:00:42,458 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.55ms. Allocated memory is still 159.4MB. Free memory was 117.5MB in the beginning and 132.0MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:00:42,458 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.46ms. Allocated memory is still 159.4MB. Free memory was 131.3MB in the beginning and 130.5MB in the end (delta: 752.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:00:42,459 INFO L158 Benchmark]: Boogie Preprocessor took 15.54ms. Allocated memory is still 159.4MB. Free memory was 130.5MB in the beginning and 129.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:00:42,459 INFO L158 Benchmark]: RCFGBuilder took 186.52ms. Allocated memory is still 159.4MB. Free memory was 129.2MB in the beginning and 120.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 18:00:42,459 INFO L158 Benchmark]: TraceAbstraction took 1117.61ms. Allocated memory is still 159.4MB. Free memory was 120.0MB in the beginning and 64.2MB in the end (delta: 55.9MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2021-12-06 18:00:42,460 INFO L158 Benchmark]: Witness Printer took 29.90ms. Allocated memory is still 159.4MB. Free memory was 64.2MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:00:42,462 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 159.4MB. Free memory is still 134.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 159.55ms. Allocated memory is still 159.4MB. Free memory was 117.5MB in the beginning and 132.0MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.46ms. Allocated memory is still 159.4MB. Free memory was 131.3MB in the beginning and 130.5MB in the end (delta: 752.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.54ms. Allocated memory is still 159.4MB. Free memory was 130.5MB in the beginning and 129.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 186.52ms. Allocated memory is still 159.4MB. Free memory was 129.2MB in the beginning and 120.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1117.61ms. Allocated memory is still 159.4MB. Free memory was 120.0MB in the beginning and 64.2MB in the end (delta: 55.9MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * Witness Printer took 29.90ms. Allocated memory is still 159.4MB. Free memory was 64.2MB in the beginning and 62.1MB 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=3, input=3] [L13] unsigned int result = id(input); [L14] COND TRUE result == 3 VAL [input=3, result=3] [L15] reach_error() VAL [input=3, result=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 156 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 127 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41 IncrementalHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 29 mSDtfsCounter, 41 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 199 SizeOfPredicates, 1 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 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! [2021-12-06 18:00:42,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f92cab5-6e2f-40c8-a11e-40da1d82a8cb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE